Hadi Guna | National University of Malaysia (original) (raw)
Books by Hadi Guna
The field of ‘green technology’ encompasses a continuously evolving group of methods and material... more The field of ‘green technology’ encompasses a continuously evolving group of methods and materials, from techniques for generating energy to non-toxic cleaning products. The present expectation is that this field will bring innovation and changes in daily life of similar magnitude to the ‘information technology’ explosion over the last two decades. In these early stages, it is impossible to predict what ‘green technology’ may eventually encompass (Gupta & Khurana, 2010). According to the recent research report of Ericsson Media Relations, energy costs account for as much as half of a mobile operator’s operating expenses. Therefore, telecommunications applications can have a direct, tangible impact on lowering greenhouse gas emissions, power consumption, and achieve efficient recycling of equipment waste. Moreover, to find radio networking solutions that can greatly improve energy-efficiency as well as resource-efficiency is not only benefit for the global environment but also makes commercial sense for telecommunication operators supporting sustainable and profitable business. Within the framework of ‘green communications’, a number of paradigm-shifting technical approaches can be expected, including but not limited to energy-efficient network architecture & protocols, energy-efficient wireless transmission techniques, cross-layer optimization methods, and opportunistic spectrum sharing without causing harmful interference pollution (Ericsson, 2008).
The green technology wavelength division multiplexing based on polymer optical fiber (GT-WDM-POF) network solution is presented. Green technology polymer optical fiber (GT-POF) splitter has been fabricated by environmental friendly handmade fusion technique, as an effective transmission media to split and recombine a number of different wavelengths. Two different wavelengths from ecologically friendly light emitting diode (LED) were fully utilized to transmit two different sources of systems; ethernat connection and video transmission system. Red LED which in 650nm wavelength capable to download and upload data through Ethernet cable while green LED in 520nm wavelength transmits a video signal. Special filter has been placed between the splitter and receiver-end to ensure GT-WDM-POF network system can select and generate a single signal as desired. Efficiency of both devices and network were observed. The material, fabrication method, system & application approach in this chapter are based on the environment friendly solution to reduce the power consumption & wastage without affecting the system performance. Our GT-POF splitter and GT-WDM-POF network solution proposed in this paper are the first reported up to this time.
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Papers by Hadi Guna
Sains Malaysiana, Jan 1, 2012
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Australian Journal of …, Jan 1, 2011
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intechopen.com
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… (ISBEIA), 2011 IEEE …, Jan 1, 2011
Abstract This paper demonstrate novel coupler 1× N coupler based on polymer optical fiber (POF) w... more Abstract This paper demonstrate novel coupler 1× N coupler based on polymer optical fiber (POF) was fabricated by handwork fusion method using yellow flame burner and metal tube. A new additional process-twisting-effect removal-is demonstrated to enhance fusion quality. For the purpose of performance characterization, LED fiber source with 650 wavelengths was injected into input fiber while optical power in output fibers was measured by optical power meter. The final results showed that the power-splitting performance of the coupler ...
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This study presents second generation low-cost fused tapered (LFT) 1 × 3 splitter (G2) as novel, ... more This study presents second generation low-cost fused tapered (LFT) 1 × 3 splitter (G2) as novel, low-cost and low-losssplitting device made from PMMA-based polymer optical fiber (POF). G2 (short taper, 0.5 - 2.0 cm) was fabricated byreformulated handwork fusion method using candle and metal tube. A new process, twisting-effect removal, is addeed to refineripple surface in fused input fiber. LED fiber source (wavelength 650) was injected into input fiber while optical power in outputfibers was measured by optical power meter. Insertion loss (7 dB) and excess loss (0.53 dB) for G2 are extremely low. G2 arehomogenous splitters since their splitting ratio are very close to 33:33:33% with ± 5% of tolerance.
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This research was conducted to develop a 1×12 optical splitter based on polymer optical fiber (PO... more This research was conducted to develop a 1×12 optical splitter based on polymer optical fiber (POF) made from polymethyl methacrylate (PMMA) material as a high efficiency optical signal transmission medium. Basically, the optical device has 1 POF input port and 12 POF output ports in a bundled fiber form. There are several system available in the market which are able to split or couple optical signals transmitted into some different channels, which are all afflicted with certain constrains. However, these systems are too expensive for most applications. The goal of this research was to develop an economical splitter for multi-purpose application over PMMA-POF. Red LED with 650 nm wavelength was injected into the splitter with the aim to analyze the power efficiency of the splitter. A coupling efficiency of 80% was demonstrated. The performance of these hand-made splitters can be improved gradually through experience and practice.
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A novel WDM-POF technology, a cost-effective and eco-friendly optical data transmission unit is t... more A novel WDM-POF technology, a cost-effective and eco-friendly optical data transmission unit is the most updated and promising innovation that will revolutionize interior automotive infotainment system which all data can be simply sent in visible light format rather than in electrical format at high speed data transmission. Infotainment system is such all-in-one entertainment media system and the latest trend in automotive network in which many appliances such as interactive gaming console, video player, ethernet navigator, camera reverse sensor and many other appliances can be integrated and equipped in car interior in ring topology. With novel WDM-POF technology, all data such can be processed with environment-friendly LED conversion and low-cost multiplexing and filtering method besides the fact that it can extend the number of appliances in car interior. This invention enables simple POF cabling system for delivering each optical data such as video, audio, Ethernet as POF is the most updated cabling technology replacing conventional copper wire for short-haul communication.
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In this paper, we report experimental demonstration of a polymer optical fiber (POF) based soluti... more In this paper, we report experimental demonstration of a polymer optical fiber (POF) based solutions in wavelength division multiplexing (WDM) network and some effects on placement of interference filters as a demultiplexer for the system. Optical signals with different wavelengths can carry different information through one fiber. All the wavelengths will be multiplexed and have to be split at the receiver to regain the information. The main idea is to develop a demultiplexer by employing the principle of WDM. The transmitter will emit three different sources (λ = 470 nm, 520 nm and 665 nm) of light and be multiplexed into single white light. However, the light has to be separated at the receiver in order to recover back the information by using demultiplexer. In this experiment, step index POF fused optical splitter is used to realize the concept of multiplexer. A handmade demultiplexer is realized by using color films for the filter. The specialized designed interference films are used to filter out any other wavelength (color) that is not within the range. It will only allow one wavelength to get through the filter and thus conveyed the data carried at the receiver. Several readings using optical power meter are taken to record the losses and power outputs for efficiency and characterization process. LEDs are injected through the fiber and the demultiplexed signals at the end receiver are analyzed. The efficiency of the demultiplexer is about 70%. Fabrication of the demultiplexer using color filters and epoxy-resin is simple although it needs meticulous concentration for certain parts. The performance shows that the system can be used for short distance data communication in larger bandwidth and faster data rate .
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Optical Fiber made by plastic or polymer, can be and is being used in various fields of applicati... more Optical Fiber made by plastic or polymer, can be and is being used in various fields of application.
Two of the main fields are the automotive and the home networking. polymer optical fiber (POF) here can be seen
as one of the best solutions for small world communication, especially in home networking application. In this
paper, optical 13 fused-taper-twisted POF splitters has been fabricated by a distinguished technique and proposed
to be applied on small world communication application. There several systems available on the market, which can
be split a coupled signal to be transmitted into some different channels, which are all afflicted with certain
disadvantages. But all these solutions have one main constraint; very expensive for most of the applications as
mentioned above. So the goal of this study is to fabricate an economical splitter for small world communication over
POF. Characterization of the splitter was reported. Reach up until 668 nm wavelengths Light Emitting Diode (LED)
has been injected into the splitter to determine and analyze the level of efficiency of the splitter. Final analysis
shows that efficiency of splitter output able to reach up to 80%. The device performance can be improved gradually
through experience and practice. Main point here is the fabrication process is simple, easy and suitable to be used for
household.
Bookmarks Related papers MentionsView impact
The requirements of bandwidth are increasing very fast in communication systems and therefore the... more The requirements of bandwidth are increasing very fast in communication systems and therefore the effective solution is to use the Wavelength Division Multiplexing (WDM) technology, whereby several different wavelengths can carry information over one Polymer Optical Fiber (POF). Wavelength Division Multiplexer is an essential component to combine several different wavelengths before all wavelengths are carried together over single POF. In most instances, the conventional multiplexers are afflicted with certain disadvantages and one major disadvantage is that they are costly for most of the POF applications. Thus, the goal of this study is to develop self-fabricated 1x4 POF coupler as an economical optical multiplexer for WDM transmission over POF. The POF coupler has been fabricated by homemade fusion technique. Red LED with a 650 nm wavelength has been injected into the coupler for the purpose of characterization testing to analyze the level of power efficiency of the splitter. The characterization of POF coupler reveals that the maximum power efficiency could be reached up to 90%. The result exhibits that self-fabricated 1x4 POF coupler has great potential to be applied as optical multiplexer for WDM fiber technology due to the character of high-efficiency and low-cost.
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The requirements of bandwidth are increasing very fast in communication systems and therefore the... more The requirements of bandwidth are increasing very fast in communication systems and therefore the effective solution is to use the Wavelength Division Multiplexing (WDM) technology, whereby several different wavelengths can carry information over one Polymer Optical Fiber (POF). Wavelength Division Multiplexer is an essential component to combine several different wavelengths before all wavelengths are carried together over single POF. In most instances, the conventional multiplexers are afflicted with certain disadvantages and one major disadvantage is that they are costly for most of the POF applications. Thus, the goal of this study is to develop self-fabricated 1x4 POF coupler as an economical optical multiplexer for WDM transmission over POF. The POF coupler has been fabricated by homemade fusion technique. Red LED with a 650 nm wavelength has been injected into the coupler for the purpose of characterization testing to analyze the level of power efficiency of the splitter. The characterization of POF coupler reveals that the minimum insertion loss could reach 2.42 dB. The result exhibits that self-fabricated 1x4 POF coupler has great potential to be applied as optical multiplexer for WDM fiber technology due to the character
of high-efficiency and low-cost.
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Polymer Optical Fiber (POF) can be and are being used in various field of application, especially... more Polymer Optical Fiber (POF) can be and are being used in various field of application, especially for short distance application due to the high-speed data transmission, low power loss and of course have higher bandwidth. Hence, POF here can be seen as one of the best solution for home networking. Home made optical 1x3 fused-taper-twisted polymer optical fiber (POF) splitters has been fabricated by fused technique. Characterization of the splitter for household usage was reported. Red LED with a 650 nm wavelength has been injected into the splitter for the purpose of characterization testing to analyze the level of power efficiency of the splitter. Some parameters, such as optical output power, POFs attenuation characteristics and power losses on the network were observed. Although the maximum output power efficiency of the splitter is about 60% but it can be improved gradually through experience and practice. The goal of this study is to develop an economical splitter for home network application over POF. Main point here is the fabrication process is simple, easy and suitable to be used for household.
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In this paper, we discussed the mechanism of optical fiber break in time division multiplexing pa... more In this paper, we discussed the mechanism of optical fiber break in time division multiplexing passive optical network (TDM-PON) and the upwardly or downwardly monitoring issues with conventional fiber fault localization technique by using optical time domain reflectometer (OTDR). We also studied the previous fault localization technology that had been recommended. Finally, we proposed a centralized inline monitoring and network testing system named as Centralized Failure Detection System (CFDS). CFDS will be installed with optical line terminal (OLT) at
the central office (CO) or network operation center to centrally monitoring each optical fiber line's status and detecting the failure location that occurs in the multi-line drop region of fiber-to-the-home (FTTH) access network downwardly from towards the customer premises to improve the service reliability and reduce the restoration time and maintenance cost.
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Optical 1x12 fused-taper-twisted polymer optical fiber (POF) couplers has been fabricated by a pe... more Optical 1x12 fused-taper-twisted polymer optical fiber (POF) couplers has been fabricated by a perform technique. Characterization of the coupler which proposed to be used in
short haul communication application was reported.
Characterization test on the network were observed. The
maximum output power efficiency of the coupler is about 40%.
Bookmarks Related papers MentionsView impact
The infrastructure that was developed in the village of indigenous people over the utility just l... more The infrastructure that was developed in the village of indigenous people over the utility just like water,
electricity, cooking materials. However, communications with the outside world system is not developed
properly. Telephone, Internet and online entertainment cannot be owned by them. This is due to consideration
of the maintenance work is difficult and cannot be done by the party offering the service. Therefore, this study
proposes a method of development of communication systems can be developed by the user without the use
of complex systems and solutions. This means that the devices and the communication system platform is
developed their own and additionally can be repaired by the users themselves without outside help.
Communications of the proposed green is safe, large capacity data transmission and solutions are
environmentally friendly. Completion of the offer are suitable for facilities in rural population, especially
indigenous people in Malaysia.
Bookmarks Related papers MentionsView impact
Optical Communication Systems is a major course which offered in high-speed communication systems... more Optical Communication Systems is a major course which offered in high-speed communication systems
module in communication engineering program. To ensure the qualities of good teaching and learning, some
activities need to be organized such as embedded laboratory in course. In this laboratory students are required
to make a mini-group project to design an optical communication system of the new millennium. This study
reported a plastic-based communication system in which students are involved with the development of its own
components transmitter, receiver and Plastic Optical Fiber (POF) devices. The Network is developed by using
LED sources which modulated with data at different transmission rates. The proposed system can be classified
as Green Technology because the fabrication process of devices (optical splitter) is done without involving
chemicals and gasses. The outcomes of this study enable the students develop their own communication system
using LED POF communication with high capacity, inexpensive and safe, and practice in their daily lives and
with the environmental friendly awareness.
Bookmarks Related papers MentionsView impact
IJCSNS, Jan 1, 2008
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Journal of Applied …, Jan 1, 2010
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… Conference on Computer …, Jan 1, 2009
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The field of ‘green technology’ encompasses a continuously evolving group of methods and material... more The field of ‘green technology’ encompasses a continuously evolving group of methods and materials, from techniques for generating energy to non-toxic cleaning products. The present expectation is that this field will bring innovation and changes in daily life of similar magnitude to the ‘information technology’ explosion over the last two decades. In these early stages, it is impossible to predict what ‘green technology’ may eventually encompass (Gupta & Khurana, 2010). According to the recent research report of Ericsson Media Relations, energy costs account for as much as half of a mobile operator’s operating expenses. Therefore, telecommunications applications can have a direct, tangible impact on lowering greenhouse gas emissions, power consumption, and achieve efficient recycling of equipment waste. Moreover, to find radio networking solutions that can greatly improve energy-efficiency as well as resource-efficiency is not only benefit for the global environment but also makes commercial sense for telecommunication operators supporting sustainable and profitable business. Within the framework of ‘green communications’, a number of paradigm-shifting technical approaches can be expected, including but not limited to energy-efficient network architecture & protocols, energy-efficient wireless transmission techniques, cross-layer optimization methods, and opportunistic spectrum sharing without causing harmful interference pollution (Ericsson, 2008).
The green technology wavelength division multiplexing based on polymer optical fiber (GT-WDM-POF) network solution is presented. Green technology polymer optical fiber (GT-POF) splitter has been fabricated by environmental friendly handmade fusion technique, as an effective transmission media to split and recombine a number of different wavelengths. Two different wavelengths from ecologically friendly light emitting diode (LED) were fully utilized to transmit two different sources of systems; ethernat connection and video transmission system. Red LED which in 650nm wavelength capable to download and upload data through Ethernet cable while green LED in 520nm wavelength transmits a video signal. Special filter has been placed between the splitter and receiver-end to ensure GT-WDM-POF network system can select and generate a single signal as desired. Efficiency of both devices and network were observed. The material, fabrication method, system & application approach in this chapter are based on the environment friendly solution to reduce the power consumption & wastage without affecting the system performance. Our GT-POF splitter and GT-WDM-POF network solution proposed in this paper are the first reported up to this time.
Bookmarks Related papers MentionsView impact
Sains Malaysiana, Jan 1, 2012
Bookmarks Related papers MentionsView impact
Australian Journal of …, Jan 1, 2011
Bookmarks Related papers MentionsView impact
intechopen.com
Bookmarks Related papers MentionsView impact
… (ISBEIA), 2011 IEEE …, Jan 1, 2011
Abstract This paper demonstrate novel coupler 1× N coupler based on polymer optical fiber (POF) w... more Abstract This paper demonstrate novel coupler 1× N coupler based on polymer optical fiber (POF) was fabricated by handwork fusion method using yellow flame burner and metal tube. A new additional process-twisting-effect removal-is demonstrated to enhance fusion quality. For the purpose of performance characterization, LED fiber source with 650 wavelengths was injected into input fiber while optical power in output fibers was measured by optical power meter. The final results showed that the power-splitting performance of the coupler ...
Bookmarks Related papers MentionsView impact
This study presents second generation low-cost fused tapered (LFT) 1 × 3 splitter (G2) as novel, ... more This study presents second generation low-cost fused tapered (LFT) 1 × 3 splitter (G2) as novel, low-cost and low-losssplitting device made from PMMA-based polymer optical fiber (POF). G2 (short taper, 0.5 - 2.0 cm) was fabricated byreformulated handwork fusion method using candle and metal tube. A new process, twisting-effect removal, is addeed to refineripple surface in fused input fiber. LED fiber source (wavelength 650) was injected into input fiber while optical power in outputfibers was measured by optical power meter. Insertion loss (7 dB) and excess loss (0.53 dB) for G2 are extremely low. G2 arehomogenous splitters since their splitting ratio are very close to 33:33:33% with ± 5% of tolerance.
Bookmarks Related papers MentionsView impact
This research was conducted to develop a 1×12 optical splitter based on polymer optical fiber (PO... more This research was conducted to develop a 1×12 optical splitter based on polymer optical fiber (POF) made from polymethyl methacrylate (PMMA) material as a high efficiency optical signal transmission medium. Basically, the optical device has 1 POF input port and 12 POF output ports in a bundled fiber form. There are several system available in the market which are able to split or couple optical signals transmitted into some different channels, which are all afflicted with certain constrains. However, these systems are too expensive for most applications. The goal of this research was to develop an economical splitter for multi-purpose application over PMMA-POF. Red LED with 650 nm wavelength was injected into the splitter with the aim to analyze the power efficiency of the splitter. A coupling efficiency of 80% was demonstrated. The performance of these hand-made splitters can be improved gradually through experience and practice.
Bookmarks Related papers MentionsView impact
A novel WDM-POF technology, a cost-effective and eco-friendly optical data transmission unit is t... more A novel WDM-POF technology, a cost-effective and eco-friendly optical data transmission unit is the most updated and promising innovation that will revolutionize interior automotive infotainment system which all data can be simply sent in visible light format rather than in electrical format at high speed data transmission. Infotainment system is such all-in-one entertainment media system and the latest trend in automotive network in which many appliances such as interactive gaming console, video player, ethernet navigator, camera reverse sensor and many other appliances can be integrated and equipped in car interior in ring topology. With novel WDM-POF technology, all data such can be processed with environment-friendly LED conversion and low-cost multiplexing and filtering method besides the fact that it can extend the number of appliances in car interior. This invention enables simple POF cabling system for delivering each optical data such as video, audio, Ethernet as POF is the most updated cabling technology replacing conventional copper wire for short-haul communication.
Bookmarks Related papers MentionsView impact
In this paper, we report experimental demonstration of a polymer optical fiber (POF) based soluti... more In this paper, we report experimental demonstration of a polymer optical fiber (POF) based solutions in wavelength division multiplexing (WDM) network and some effects on placement of interference filters as a demultiplexer for the system. Optical signals with different wavelengths can carry different information through one fiber. All the wavelengths will be multiplexed and have to be split at the receiver to regain the information. The main idea is to develop a demultiplexer by employing the principle of WDM. The transmitter will emit three different sources (λ = 470 nm, 520 nm and 665 nm) of light and be multiplexed into single white light. However, the light has to be separated at the receiver in order to recover back the information by using demultiplexer. In this experiment, step index POF fused optical splitter is used to realize the concept of multiplexer. A handmade demultiplexer is realized by using color films for the filter. The specialized designed interference films are used to filter out any other wavelength (color) that is not within the range. It will only allow one wavelength to get through the filter and thus conveyed the data carried at the receiver. Several readings using optical power meter are taken to record the losses and power outputs for efficiency and characterization process. LEDs are injected through the fiber and the demultiplexed signals at the end receiver are analyzed. The efficiency of the demultiplexer is about 70%. Fabrication of the demultiplexer using color filters and epoxy-resin is simple although it needs meticulous concentration for certain parts. The performance shows that the system can be used for short distance data communication in larger bandwidth and faster data rate .
Bookmarks Related papers MentionsView impact
Optical Fiber made by plastic or polymer, can be and is being used in various fields of applicati... more Optical Fiber made by plastic or polymer, can be and is being used in various fields of application.
Two of the main fields are the automotive and the home networking. polymer optical fiber (POF) here can be seen
as one of the best solutions for small world communication, especially in home networking application. In this
paper, optical 13 fused-taper-twisted POF splitters has been fabricated by a distinguished technique and proposed
to be applied on small world communication application. There several systems available on the market, which can
be split a coupled signal to be transmitted into some different channels, which are all afflicted with certain
disadvantages. But all these solutions have one main constraint; very expensive for most of the applications as
mentioned above. So the goal of this study is to fabricate an economical splitter for small world communication over
POF. Characterization of the splitter was reported. Reach up until 668 nm wavelengths Light Emitting Diode (LED)
has been injected into the splitter to determine and analyze the level of efficiency of the splitter. Final analysis
shows that efficiency of splitter output able to reach up to 80%. The device performance can be improved gradually
through experience and practice. Main point here is the fabrication process is simple, easy and suitable to be used for
household.
Bookmarks Related papers MentionsView impact
The requirements of bandwidth are increasing very fast in communication systems and therefore the... more The requirements of bandwidth are increasing very fast in communication systems and therefore the effective solution is to use the Wavelength Division Multiplexing (WDM) technology, whereby several different wavelengths can carry information over one Polymer Optical Fiber (POF). Wavelength Division Multiplexer is an essential component to combine several different wavelengths before all wavelengths are carried together over single POF. In most instances, the conventional multiplexers are afflicted with certain disadvantages and one major disadvantage is that they are costly for most of the POF applications. Thus, the goal of this study is to develop self-fabricated 1x4 POF coupler as an economical optical multiplexer for WDM transmission over POF. The POF coupler has been fabricated by homemade fusion technique. Red LED with a 650 nm wavelength has been injected into the coupler for the purpose of characterization testing to analyze the level of power efficiency of the splitter. The characterization of POF coupler reveals that the maximum power efficiency could be reached up to 90%. The result exhibits that self-fabricated 1x4 POF coupler has great potential to be applied as optical multiplexer for WDM fiber technology due to the character of high-efficiency and low-cost.
Bookmarks Related papers MentionsView impact
The requirements of bandwidth are increasing very fast in communication systems and therefore the... more The requirements of bandwidth are increasing very fast in communication systems and therefore the effective solution is to use the Wavelength Division Multiplexing (WDM) technology, whereby several different wavelengths can carry information over one Polymer Optical Fiber (POF). Wavelength Division Multiplexer is an essential component to combine several different wavelengths before all wavelengths are carried together over single POF. In most instances, the conventional multiplexers are afflicted with certain disadvantages and one major disadvantage is that they are costly for most of the POF applications. Thus, the goal of this study is to develop self-fabricated 1x4 POF coupler as an economical optical multiplexer for WDM transmission over POF. The POF coupler has been fabricated by homemade fusion technique. Red LED with a 650 nm wavelength has been injected into the coupler for the purpose of characterization testing to analyze the level of power efficiency of the splitter. The characterization of POF coupler reveals that the minimum insertion loss could reach 2.42 dB. The result exhibits that self-fabricated 1x4 POF coupler has great potential to be applied as optical multiplexer for WDM fiber technology due to the character
of high-efficiency and low-cost.
Bookmarks Related papers MentionsView impact
Polymer Optical Fiber (POF) can be and are being used in various field of application, especially... more Polymer Optical Fiber (POF) can be and are being used in various field of application, especially for short distance application due to the high-speed data transmission, low power loss and of course have higher bandwidth. Hence, POF here can be seen as one of the best solution for home networking. Home made optical 1x3 fused-taper-twisted polymer optical fiber (POF) splitters has been fabricated by fused technique. Characterization of the splitter for household usage was reported. Red LED with a 650 nm wavelength has been injected into the splitter for the purpose of characterization testing to analyze the level of power efficiency of the splitter. Some parameters, such as optical output power, POFs attenuation characteristics and power losses on the network were observed. Although the maximum output power efficiency of the splitter is about 60% but it can be improved gradually through experience and practice. The goal of this study is to develop an economical splitter for home network application over POF. Main point here is the fabrication process is simple, easy and suitable to be used for household.
Bookmarks Related papers MentionsView impact
In this paper, we discussed the mechanism of optical fiber break in time division multiplexing pa... more In this paper, we discussed the mechanism of optical fiber break in time division multiplexing passive optical network (TDM-PON) and the upwardly or downwardly monitoring issues with conventional fiber fault localization technique by using optical time domain reflectometer (OTDR). We also studied the previous fault localization technology that had been recommended. Finally, we proposed a centralized inline monitoring and network testing system named as Centralized Failure Detection System (CFDS). CFDS will be installed with optical line terminal (OLT) at
the central office (CO) or network operation center to centrally monitoring each optical fiber line's status and detecting the failure location that occurs in the multi-line drop region of fiber-to-the-home (FTTH) access network downwardly from towards the customer premises to improve the service reliability and reduce the restoration time and maintenance cost.
Bookmarks Related papers MentionsView impact
Optical 1x12 fused-taper-twisted polymer optical fiber (POF) couplers has been fabricated by a pe... more Optical 1x12 fused-taper-twisted polymer optical fiber (POF) couplers has been fabricated by a perform technique. Characterization of the coupler which proposed to be used in
short haul communication application was reported.
Characterization test on the network were observed. The
maximum output power efficiency of the coupler is about 40%.
Bookmarks Related papers MentionsView impact
The infrastructure that was developed in the village of indigenous people over the utility just l... more The infrastructure that was developed in the village of indigenous people over the utility just like water,
electricity, cooking materials. However, communications with the outside world system is not developed
properly. Telephone, Internet and online entertainment cannot be owned by them. This is due to consideration
of the maintenance work is difficult and cannot be done by the party offering the service. Therefore, this study
proposes a method of development of communication systems can be developed by the user without the use
of complex systems and solutions. This means that the devices and the communication system platform is
developed their own and additionally can be repaired by the users themselves without outside help.
Communications of the proposed green is safe, large capacity data transmission and solutions are
environmentally friendly. Completion of the offer are suitable for facilities in rural population, especially
indigenous people in Malaysia.
Bookmarks Related papers MentionsView impact
Optical Communication Systems is a major course which offered in high-speed communication systems... more Optical Communication Systems is a major course which offered in high-speed communication systems
module in communication engineering program. To ensure the qualities of good teaching and learning, some
activities need to be organized such as embedded laboratory in course. In this laboratory students are required
to make a mini-group project to design an optical communication system of the new millennium. This study
reported a plastic-based communication system in which students are involved with the development of its own
components transmitter, receiver and Plastic Optical Fiber (POF) devices. The Network is developed by using
LED sources which modulated with data at different transmission rates. The proposed system can be classified
as Green Technology because the fabrication process of devices (optical splitter) is done without involving
chemicals and gasses. The outcomes of this study enable the students develop their own communication system
using LED POF communication with high capacity, inexpensive and safe, and practice in their daily lives and
with the environmental friendly awareness.
Bookmarks Related papers MentionsView impact
IJCSNS, Jan 1, 2008
Bookmarks Related papers MentionsView impact
Journal of Applied …, Jan 1, 2010
Bookmarks Related papers MentionsView impact
… Conference on Computer …, Jan 1, 2009
Bookmarks Related papers MentionsView impact
Australian Journal of …, Jan 1, 2009
Bookmarks Related papers MentionsView impact