Ary Syahriar | Universitas Al Azhar Indonesia (original) (raw)

Papers by Ary Syahriar

Journal of Physics: Conference Series, 2020

Renewable Energy Resources are increasing in a few years, this is due to the increasing increase ... more Renewable Energy Resources are increasing in a few years, this is due to the increasing increase in environmental pollution and fossil fuels which are increasingly depleted. Both bridges and toll roads actually have wind speeds that can be used and used as electricity. But there is a problem to put the power plant on the bridge or the toll road, which is quite limited land, so to install the Horizontal Axis Wind Turbine will be very difficult. Therefore, Vertical Axis Wind Turbine is used as an alternative. VAWT is used to create power plants that can use wind from vehicles on toll roads and bridges to make electricity. To be able to take advantage of the wind around the place, Computational Fluid Dynamics (CFD) is needed to optimize the design of the turbine.

IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, Oct 18, 2020

This paper presents a novel op-amp based LC oscillator circuit design for wireless communications... more This paper presents a novel op-amp based LC oscillator circuit design for wireless communications. This LC oscillator can be classified as a harmonic oscillator. Unlike the Hartley, Colpitts and Clapp oscillators, the resonant tank circuit of the proposed op-amp based LC oscillator is composed of only two components – single-inductor and single-capacitor, in parallel connection. Also, the LC oscillator does not use resistor components. The aim of this paper is to provide a low cost solution for sinusoidal oscillator design, particularly in low power mobile applications, where the power amplifier stage can be eliminated if the RF oscillator has enough output current and output voltage capabilities to supply the antenna load. On the other hand, the digital modulator is also integrated with the RF oscillator. The proposed op-amp based LC oscillator is analyzed and discussed using PSPICE simulation results. To verify the concept, experimental results are given. It can be observed that the simulation results are in line with the experimental results.

We present a numerical comparison of three parallel waveguides coupler characteristics by using t... more We present a numerical comparison of three parallel waveguides coupler characteristics by using the coupled mode theory and the method of lines. We analyzed for cases where a beam is launched into an input waveguide at the center and an outer input in the three waveguide arrangements. The output is then calculated using two methods. In the coupled mode theory we use an analytical solution and compare the results with semi numerical method of lines. The results show that both analytical and numerical scheme give similar result for simple three waveguide coupler structures.

Journal of Multimedia, Oct 25, 2015

Communication technology is one of the fields of interest today. Optical fiber communication (OFC... more Communication technology is one of the fields of interest today. Optical fiber communication (OFC) is the only answer to overcome the rapid increase in bandwidth requirements. The OFC system offers high speeds up to several gigabits per second and also a very high bandwidth. Optical fiber is very light and has the ability to transfer information in large quantities. Unfortunately, optical fiber transmission systems have effects that can increase fiber signals such as attenuation, dispersion and nonlinearity. Optical solitons that can replace dispersive effects offer a better solution to this problem. Soliton communication systems do not widen along links such as non-soliton communication systems. In this paper will discuss the differences in the performance of fibers with solitons and non-soliton fibers. The results obtained based on eye diagram analysis and bit error rate analysis, it can be seen that fiber systems with soli-tons have minimum distortion, and non-soliton fiber systems have noise in the system.

The sensing applications of fiber Bragg gratings (FBGs) offer a high sensitivity, as well as othe... more The sensing applications of fiber Bragg gratings (FBGs) offer a high sensitivity, as well as other important advantages, such as real-time processing, long-term stability, immunity to electromagnetic interference, and convenient multiplexing capabilities. The reflection spectrum of fiber Bragg gratings with a uniform modulation of the refractive index is accompanied by series of sidelobes at the adjacent wavelength. It is very important to minimize and, if possible, eliminate the reflectivity of these sidelobes. The design of fiber Bragg gratings used Coupled Mode Theory. The coupled mode equations were solved by the Transfer Matrix Method since it was considered as good approximation to calculate the spectral response of fiber Bragg gratings. Apodization techniques are used to get optimized reflection spectrum. The uniform FBGs with several types of apodization were modeled in this project It was proven that apodization profile could be reduced the sidelobes. In addition, each profile also has the bandwidth and the maximum reflectivity better than others.

Universal journal of electrical and electronic engineering, Jul 1, 2019

Optical fiber communication has characteristics that really need attention. The characteristics o... more Optical fiber communication has characteristics that really need attention. The characteristics of fiber optic transmission are very important in designing optical fiber networks, one of which is widening pulses called dispersions. Dispersion is the widening of light pulses in optical fibers which reduces data speed, signal to noise ratio and system quality. In addition to dispersion compensation, which is the most important feature needed in fiber-optic communication systems; transmission power needs to be considered to produce optimal signal output. In this paper, we will simulate the optimization effect of power and fiber dispersion compensation on Non Return to Zero (NRZ) and Return to Zero (RZ) modulation on optical transmission systems, with 5 dBm power parameters, 10 dBm 15 dBm and 0 dBm and DCF 5 km, 10 km, 15 km, 20 km and 25 km. Simulation results show that dispersion compensation is very influential on the transmission system. From these two modulations, there are differences in the results between NRZ and RZ. The results of dispersion compensation also affect the input power and DCF length.

As technologies are moving to be faster, smaller, and better, demands for a reliable oscillator d... more As technologies are moving to be faster, smaller, and better, demands for a reliable oscillator design have been increasing. A novel oscillator design using a closed-loop dual comparator circuit (CLDC) has previously been proposed and proven as a good relaxation oscillator for high-performance future applications. In this paper, other configurations of the CLDC circuit will be investigated for voltage regulator and power supply controller applications. The simulation results confirm that CLDC as a controllable switched capacitor for voltage regulator application can provide precise regulation with a peak-to-peak voltage ripple of 5 mV. Furthermore, CLDC is also promising to be used as a voltage mode controller for buck converter and can achieve load regulation and line regulation of 0.00025 mV/mA and 0.0015, respectively. The proposed controller demonstrates a fast load transient response and low dropout voltage despite high variability in the input load. As a result, a lower cost and better performance on-chip voltage regulator can be realized to fulfill the needs of future power supply systems.

we report on the choice of MgF2 as cladding layers on silica-on-silicon optical waveguides fabric... more we report on the choice of MgF2 as cladding layers on silica-on-silicon optical waveguides fabricated by electron beam irradiation. The deposition methods need to be chosen carefully with low temperature as not to damage the low refractive index change during fabrication process. The main consideration is that the refractive index of the cladding layer should be very close to that of silica and it have good transparency, as well as be capable of being deposited at low temperature. The thickness profile then examined using DEKTAK II surface profiler.

Bending waveguide is used to connect two separated optical waveguides. But the bend will produce ... more Bending waveguide is used to connect two separated optical waveguides. But the bend will produce a huge loss. The bending loss can be reduced by designing effective refractive index for the core and cladding, the radiator curvature bend, and S-shaped bend design. In this paper, we will compute radiation loss between two geometrics structure waveguide bend, a back-to-back and sinusoidal on symmetrical slab waveguide. From the simulation result, we can obtain the radiation loss depends on Δn in slab waveguide. Radiation loss will decrease when Δn and length of the waveguide increase. Then we obtain the comparison characteristics of radius curvature and radiation loss of S-bend optical waveguides bend based on back-to-back and sinusoidal.

People's rising concerns about health have fueled research into high-performance biomedical d... more People's rising concerns about health have fueled research into high-performance biomedical devices and circuits, such as sensors and implantable systems on a chip. It is important for these biomedical devices to operate at the same low frequency to treat certain organs and diseases. Thus, the clock generator needs to be able to provide low frequency clock pulses with minimal size and high reliability. These constraints elevate power consumption and production cost within the circuit design to key parameters. One promising candidate is relaxation oscillator which has good on-chip compatibility, and superior frequency stability. This paper proposes a novel relaxation oscillator using closed-loop dual comparator. A frequency in the band of 50Hz to 2.5kHz can be generated by replacing the value of resistors and capacitor in all possible combinations. The simulation and experimental result confirm that closed-loop dual comparator-based relaxation oscillator provides low frequency with lower cost and more simplicity due to fewer components.

Journal of Engineering and Technological Sciences, May 31, 2021

 The method of lines was applied to analyze the wavelength dependence characteristics of directi... more  The method of lines was applied to analyze the wavelength dependence characteristics of directional couplers.  This forward semi numerical and analytical scheme was proven to be a versatile method to simulate simple optical directional couplers.  To prevent mode back reflection propagating near the computational edge, a special absorbing boundary condition was applied to increase the calculation accuracy.  The switching characteristics of optical directional couplers were analyzed to show the versatility of the method of lines.

Advanced Science Letters, Apr 1, 2017

Journal of physics, Mar 1, 2019

Curved waveguides are an important wave guiding structure and have been widely used in building i... more Curved waveguides are an important wave guiding structure and have been widely used in building integrated photonics circuits with various functions including directional couplers, modulators, ring resonators, and Mach-Zehnder interferometers etc. However, curved structure always leads to attenuation of the guided mode as it propagates through the bend region. In practice the bending loss may be negligible if the radius of curvature is large, but the loss increases rapidly at small radii. Amongst curved waveguide structures the S-bend has been widely used, because it is relatively easy to design and can provide a low transition loss between parallel offset waveguides. In this paper we present a new general approach to S-bend optical waveguides by cascading multiple sections of uniformly curved waveguides. The aims are to offer maximize structure that can be used in more powerful beam propagation methods to estimate the loss in bends of continuously-varying curvature. We approach the S shaped bend waveguide by multiple sections such as 2, 6, 14 and 30 sections back to back and calculate the total loss. The convergence of resulting curvature variation are very rapid and the overall loss calculation found good agreement with analytical calculation based on low slope approximation.

Universal journal of electrical and electronic engineering, Jul 1, 2019

Developments in the technology sector are currently experiencing rapid progress, especially in da... more Developments in the technology sector are currently experiencing rapid progress, especially in data transmission technology. The increasing need for fast data traffic in the telecommunications sector requires technology that can send data quickly. Optical fiber has the speed of receiving and sending data at 2.5 Gbps while FSO has a speed of up to 100 Gbps but this depends on Wavelength, the modulation technique used and the distance of the telescope between the transmitter and receiver. The speed of receiving and sending data also depends on the Quality (Q) of the signal, the greater the value of Quality (Q) of the signal, the better the Quality of the signal. FSO is an optical communication system that uses the atmosphere as its propagation medium and Optical Fiber uses silica as its propagation medium. Therefore, in this paper, a performance analysis of Free Space Optics (FSO) and Single Mode Fiber is carried out based on the Quality Factor and Bit Error Rate (BER) of a signal that is carried out using Optical System simulations with a wavelength of 1310 nm, 1380 nm, 1550 nm, 1550 nm and 1560 nm, with 1 km, 3 km and 5 km, respectively. Then, analysis uses an Eye Diagram to analyze the output signal and compare the Factor Q and Bit Rate Error (BER).

Jurnal elektronika dan telekomunikasi, Aug 31, 2017

Transmisi optik nirkabel dengan kecepatan tinggi memiliki berbagai potensi untuk aplikasi jarak p... more Transmisi optik nirkabel dengan kecepatan tinggi memiliki berbagai potensi untuk aplikasi jarak pendek terutama untuk komunikasi di dalam ruangan. Tulisan ini memaparkan perbandingan kinerja transmisi FSO menggunakan beberapa variasi skema modulasi. Pengamatan unjuk kinerja terutama dilakukan menggunakan bit error rate (BER). Gangguan turbulensi atmorferik menjadi bagian dari pemodelan kanal log normal yang digunakan dalam simulasi. Modulasi dasar spasial yang digunakan adalah on-off keying sebagai teknik klasik FSO, beserta pulse position modulation yang merupakan variasi spasialnya. Menelaah penggunaan modulasi baseband untuk sistem optik, disimulasikan PSK 2, 4, 8, 16, serta QAM 4 dan 16. Simulasi dengan data ukuran kecil menghasilkan bahwa BPSK dan 4 QAM menunjukkan unjuk kerja terbaik dengan BER rata-rata sekitar 10-3 pada kondisi gangguan sedang sampai tinggi. Sementara tingkat error pada OOK dan PPM masih di atas 10-0.5 .

Jurnal Sains dan Teknologi Indonesia, Mar 4, 2012

A preliminary research on the roles of information can communication technology for poverty allev... more A preliminary research on the roles of information can communication technology for poverty alleviation has been done. The research based on analysis of secondary data on ICT access and poverty data during the year 200-2006. It was found that there exist paradoxes where ICT infrastructure mainly concentrated in the capital city and other big cities but poverty mainly concentrated in rural area. These have created complex problem to solve poverty by using ICT. This paper is trying to introduce the roles of ICT and its solution in helping to reduce poverty in Indonesia.

Journal of Physics: Conference Series, 2020

Renewable Energy Resources are increasing in a few years, this is due to the increasing increase ... more Renewable Energy Resources are increasing in a few years, this is due to the increasing increase in environmental pollution and fossil fuels which are increasingly depleted. Both bridges and toll roads actually have wind speeds that can be used and used as electricity. But there is a problem to put the power plant on the bridge or the toll road, which is quite limited land, so to install the Horizontal Axis Wind Turbine will be very difficult. Therefore, Vertical Axis Wind Turbine is used as an alternative. VAWT is used to create power plants that can use wind from vehicles on toll roads and bridges to make electricity. To be able to take advantage of the wind around the place, Computational Fluid Dynamics (CFD) is needed to optimize the design of the turbine.

IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, Oct 18, 2020

This paper presents a novel op-amp based LC oscillator circuit design for wireless communications... more This paper presents a novel op-amp based LC oscillator circuit design for wireless communications. This LC oscillator can be classified as a harmonic oscillator. Unlike the Hartley, Colpitts and Clapp oscillators, the resonant tank circuit of the proposed op-amp based LC oscillator is composed of only two components – single-inductor and single-capacitor, in parallel connection. Also, the LC oscillator does not use resistor components. The aim of this paper is to provide a low cost solution for sinusoidal oscillator design, particularly in low power mobile applications, where the power amplifier stage can be eliminated if the RF oscillator has enough output current and output voltage capabilities to supply the antenna load. On the other hand, the digital modulator is also integrated with the RF oscillator. The proposed op-amp based LC oscillator is analyzed and discussed using PSPICE simulation results. To verify the concept, experimental results are given. It can be observed that the simulation results are in line with the experimental results.

We present a numerical comparison of three parallel waveguides coupler characteristics by using t... more We present a numerical comparison of three parallel waveguides coupler characteristics by using the coupled mode theory and the method of lines. We analyzed for cases where a beam is launched into an input waveguide at the center and an outer input in the three waveguide arrangements. The output is then calculated using two methods. In the coupled mode theory we use an analytical solution and compare the results with semi numerical method of lines. The results show that both analytical and numerical scheme give similar result for simple three waveguide coupler structures.

Journal of Multimedia, Oct 25, 2015

Communication technology is one of the fields of interest today. Optical fiber communication (OFC... more Communication technology is one of the fields of interest today. Optical fiber communication (OFC) is the only answer to overcome the rapid increase in bandwidth requirements. The OFC system offers high speeds up to several gigabits per second and also a very high bandwidth. Optical fiber is very light and has the ability to transfer information in large quantities. Unfortunately, optical fiber transmission systems have effects that can increase fiber signals such as attenuation, dispersion and nonlinearity. Optical solitons that can replace dispersive effects offer a better solution to this problem. Soliton communication systems do not widen along links such as non-soliton communication systems. In this paper will discuss the differences in the performance of fibers with solitons and non-soliton fibers. The results obtained based on eye diagram analysis and bit error rate analysis, it can be seen that fiber systems with soli-tons have minimum distortion, and non-soliton fiber systems have noise in the system.

The sensing applications of fiber Bragg gratings (FBGs) offer a high sensitivity, as well as othe... more The sensing applications of fiber Bragg gratings (FBGs) offer a high sensitivity, as well as other important advantages, such as real-time processing, long-term stability, immunity to electromagnetic interference, and convenient multiplexing capabilities. The reflection spectrum of fiber Bragg gratings with a uniform modulation of the refractive index is accompanied by series of sidelobes at the adjacent wavelength. It is very important to minimize and, if possible, eliminate the reflectivity of these sidelobes. The design of fiber Bragg gratings used Coupled Mode Theory. The coupled mode equations were solved by the Transfer Matrix Method since it was considered as good approximation to calculate the spectral response of fiber Bragg gratings. Apodization techniques are used to get optimized reflection spectrum. The uniform FBGs with several types of apodization were modeled in this project It was proven that apodization profile could be reduced the sidelobes. In addition, each profile also has the bandwidth and the maximum reflectivity better than others.

Universal journal of electrical and electronic engineering, Jul 1, 2019

Optical fiber communication has characteristics that really need attention. The characteristics o... more Optical fiber communication has characteristics that really need attention. The characteristics of fiber optic transmission are very important in designing optical fiber networks, one of which is widening pulses called dispersions. Dispersion is the widening of light pulses in optical fibers which reduces data speed, signal to noise ratio and system quality. In addition to dispersion compensation, which is the most important feature needed in fiber-optic communication systems; transmission power needs to be considered to produce optimal signal output. In this paper, we will simulate the optimization effect of power and fiber dispersion compensation on Non Return to Zero (NRZ) and Return to Zero (RZ) modulation on optical transmission systems, with 5 dBm power parameters, 10 dBm 15 dBm and 0 dBm and DCF 5 km, 10 km, 15 km, 20 km and 25 km. Simulation results show that dispersion compensation is very influential on the transmission system. From these two modulations, there are differences in the results between NRZ and RZ. The results of dispersion compensation also affect the input power and DCF length.

As technologies are moving to be faster, smaller, and better, demands for a reliable oscillator d... more As technologies are moving to be faster, smaller, and better, demands for a reliable oscillator design have been increasing. A novel oscillator design using a closed-loop dual comparator circuit (CLDC) has previously been proposed and proven as a good relaxation oscillator for high-performance future applications. In this paper, other configurations of the CLDC circuit will be investigated for voltage regulator and power supply controller applications. The simulation results confirm that CLDC as a controllable switched capacitor for voltage regulator application can provide precise regulation with a peak-to-peak voltage ripple of 5 mV. Furthermore, CLDC is also promising to be used as a voltage mode controller for buck converter and can achieve load regulation and line regulation of 0.00025 mV/mA and 0.0015, respectively. The proposed controller demonstrates a fast load transient response and low dropout voltage despite high variability in the input load. As a result, a lower cost and better performance on-chip voltage regulator can be realized to fulfill the needs of future power supply systems.

we report on the choice of MgF2 as cladding layers on silica-on-silicon optical waveguides fabric... more we report on the choice of MgF2 as cladding layers on silica-on-silicon optical waveguides fabricated by electron beam irradiation. The deposition methods need to be chosen carefully with low temperature as not to damage the low refractive index change during fabrication process. The main consideration is that the refractive index of the cladding layer should be very close to that of silica and it have good transparency, as well as be capable of being deposited at low temperature. The thickness profile then examined using DEKTAK II surface profiler.

Bending waveguide is used to connect two separated optical waveguides. But the bend will produce ... more Bending waveguide is used to connect two separated optical waveguides. But the bend will produce a huge loss. The bending loss can be reduced by designing effective refractive index for the core and cladding, the radiator curvature bend, and S-shaped bend design. In this paper, we will compute radiation loss between two geometrics structure waveguide bend, a back-to-back and sinusoidal on symmetrical slab waveguide. From the simulation result, we can obtain the radiation loss depends on Δn in slab waveguide. Radiation loss will decrease when Δn and length of the waveguide increase. Then we obtain the comparison characteristics of radius curvature and radiation loss of S-bend optical waveguides bend based on back-to-back and sinusoidal.

People's rising concerns about health have fueled research into high-performance biomedical d... more People's rising concerns about health have fueled research into high-performance biomedical devices and circuits, such as sensors and implantable systems on a chip. It is important for these biomedical devices to operate at the same low frequency to treat certain organs and diseases. Thus, the clock generator needs to be able to provide low frequency clock pulses with minimal size and high reliability. These constraints elevate power consumption and production cost within the circuit design to key parameters. One promising candidate is relaxation oscillator which has good on-chip compatibility, and superior frequency stability. This paper proposes a novel relaxation oscillator using closed-loop dual comparator. A frequency in the band of 50Hz to 2.5kHz can be generated by replacing the value of resistors and capacitor in all possible combinations. The simulation and experimental result confirm that closed-loop dual comparator-based relaxation oscillator provides low frequency with lower cost and more simplicity due to fewer components.

Journal of Engineering and Technological Sciences, May 31, 2021

 The method of lines was applied to analyze the wavelength dependence characteristics of directi... more  The method of lines was applied to analyze the wavelength dependence characteristics of directional couplers.  This forward semi numerical and analytical scheme was proven to be a versatile method to simulate simple optical directional couplers.  To prevent mode back reflection propagating near the computational edge, a special absorbing boundary condition was applied to increase the calculation accuracy.  The switching characteristics of optical directional couplers were analyzed to show the versatility of the method of lines.

Advanced Science Letters, Apr 1, 2017

Journal of physics, Mar 1, 2019

Curved waveguides are an important wave guiding structure and have been widely used in building i... more Curved waveguides are an important wave guiding structure and have been widely used in building integrated photonics circuits with various functions including directional couplers, modulators, ring resonators, and Mach-Zehnder interferometers etc. However, curved structure always leads to attenuation of the guided mode as it propagates through the bend region. In practice the bending loss may be negligible if the radius of curvature is large, but the loss increases rapidly at small radii. Amongst curved waveguide structures the S-bend has been widely used, because it is relatively easy to design and can provide a low transition loss between parallel offset waveguides. In this paper we present a new general approach to S-bend optical waveguides by cascading multiple sections of uniformly curved waveguides. The aims are to offer maximize structure that can be used in more powerful beam propagation methods to estimate the loss in bends of continuously-varying curvature. We approach the S shaped bend waveguide by multiple sections such as 2, 6, 14 and 30 sections back to back and calculate the total loss. The convergence of resulting curvature variation are very rapid and the overall loss calculation found good agreement with analytical calculation based on low slope approximation.

Universal journal of electrical and electronic engineering, Jul 1, 2019

Developments in the technology sector are currently experiencing rapid progress, especially in da... more Developments in the technology sector are currently experiencing rapid progress, especially in data transmission technology. The increasing need for fast data traffic in the telecommunications sector requires technology that can send data quickly. Optical fiber has the speed of receiving and sending data at 2.5 Gbps while FSO has a speed of up to 100 Gbps but this depends on Wavelength, the modulation technique used and the distance of the telescope between the transmitter and receiver. The speed of receiving and sending data also depends on the Quality (Q) of the signal, the greater the value of Quality (Q) of the signal, the better the Quality of the signal. FSO is an optical communication system that uses the atmosphere as its propagation medium and Optical Fiber uses silica as its propagation medium. Therefore, in this paper, a performance analysis of Free Space Optics (FSO) and Single Mode Fiber is carried out based on the Quality Factor and Bit Error Rate (BER) of a signal that is carried out using Optical System simulations with a wavelength of 1310 nm, 1380 nm, 1550 nm, 1550 nm and 1560 nm, with 1 km, 3 km and 5 km, respectively. Then, analysis uses an Eye Diagram to analyze the output signal and compare the Factor Q and Bit Rate Error (BER).

Jurnal elektronika dan telekomunikasi, Aug 31, 2017

Transmisi optik nirkabel dengan kecepatan tinggi memiliki berbagai potensi untuk aplikasi jarak p... more Transmisi optik nirkabel dengan kecepatan tinggi memiliki berbagai potensi untuk aplikasi jarak pendek terutama untuk komunikasi di dalam ruangan. Tulisan ini memaparkan perbandingan kinerja transmisi FSO menggunakan beberapa variasi skema modulasi. Pengamatan unjuk kinerja terutama dilakukan menggunakan bit error rate (BER). Gangguan turbulensi atmorferik menjadi bagian dari pemodelan kanal log normal yang digunakan dalam simulasi. Modulasi dasar spasial yang digunakan adalah on-off keying sebagai teknik klasik FSO, beserta pulse position modulation yang merupakan variasi spasialnya. Menelaah penggunaan modulasi baseband untuk sistem optik, disimulasikan PSK 2, 4, 8, 16, serta QAM 4 dan 16. Simulasi dengan data ukuran kecil menghasilkan bahwa BPSK dan 4 QAM menunjukkan unjuk kerja terbaik dengan BER rata-rata sekitar 10-3 pada kondisi gangguan sedang sampai tinggi. Sementara tingkat error pada OOK dan PPM masih di atas 10-0.5 .

Jurnal Sains dan Teknologi Indonesia, Mar 4, 2012

A preliminary research on the roles of information can communication technology for poverty allev... more A preliminary research on the roles of information can communication technology for poverty alleviation has been done. The research based on analysis of secondary data on ICT access and poverty data during the year 200-2006. It was found that there exist paradoxes where ICT infrastructure mainly concentrated in the capital city and other big cities but poverty mainly concentrated in rural area. These have created complex problem to solve poverty by using ICT. This paper is trying to introduce the roles of ICT and its solution in helping to reduce poverty in Indonesia.