Future Generation of Passive Optical Networks (original) (raw)
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Bidirectional OFDM WDM PON System Employing 16 QAM Intensity Modulated OFDM, Photonics Letters
PHOTONICS LETTERS OF POLAND, 2016
We have investigated an orthogonal frequency-division multiplexing (OFDM) wavelength-division-multiplexing (WDM) passive optical network (PON) with centralized lightwave and direct detection. The system was demonstrated for 10 Gbps 16 quadrature amplitude modulation (16-QAM) intensity-modulated OFDM downstream signals and 2.5 Gbps On-off keying (OOK) upstream signals respectively. A wavelength-reuse scheme is employed to carry the upstream data by using a mach-zehnder modulator (MZM) as an intensity modulator at the optical network unit (ONU). The proposed scheme offers a promising solution for future PONs.
Photonics Letters of Poland, 2016
We have investigated an orthogonal frequency-division multiplexing (OFDM) wavelength-division-multiplexing (WDM) passive optical network (PON) with centralized lightwave and direct detection. The system was demonstrated for 10 Gbps 16 quadrature amplitude modulation (16-QAM) intensity-modulated OFDM downstream signals and 2.5 Gbps On-off keying (OOK) upstream signals respectively. A wavelength-reuse scheme is employed to carry the upstream data by using a mach-zehnder modulator (MZM) as an intensity modulator at the optical network unit (ONU). The proposed scheme offers a promising solution for future PONs.
A passive optical network based on centralized wavelength and bandwidth scalable OFDM signals
2009 11th International Conference on Transparent Optical Networks, 2009
In this paper, we propose a simple and cost-effective bandwidth scalable passive optical network (PON) based on orthogonal frequency division multiplexing (BSOFDM-PON). We report performance analysis in terms of the signal-to-noise ratio (SNR), bit-error-rate (BER) and error vector magnitude (EVM) of a PON system accommodating 32 optical network units (ONUs). Our simulations have successfully demonstrated that throughput of 35.5 and 53.2 Gbps can be achieved using 16 and 64 QAM, respectively, within a total distance ranging from 20 to 30 km. It gives throughputs of 1.10 and 1.66 Gbps per ONU.
A bandwidth scalable OFDM passive optical network for future access network
Photonic Network Communications, 2009
In order to reduce the cost for delivering the ever increasing broadband services, network providers need to simplify their network architectures and have a better control of the bandwidth. In this article, we propose a simple and cost-effective bandwidth scalable passive optical network (PON) based on orthogonal frequency division multiplexing (BSOFDM-PON). We report performance analysis in terms of the signal-to-noise ratio (SNR), bit-error-rate (BER), and error vector magnitude (EVM) of a PON system accommodating 32 optical network units (ONUs). Our simulations have successfully demonstrated that throughputs of 35.5 and 53.2 Gbps can be achieved using 16 and 64 QAM, respectively, within a total distance ranging from 20 to 30 km. It gives throughputs of 1.10 and 1.66 Gbps per ONU.
1.6 Tbit/s OFDM WDM-PON system employing RSOA as a colorless transmitter
In this paper, we have evaluated a bidirectional Wavelength Division Multiplexing Passive Optical Network (WDM-PON) employing Intensity Modulated/Direct Detection Optical Orthogonal Frequency Division Multiplexing (IM/DD-OFDM). The proposed system employs 100 Gbps 16 Quadrature Amplitude Modulation (16-QAM) downstream and 5 Gbps On-Off keying (OOK) upstream wavelengths, respectively. The proposed system is considered low-cost as non-coherent IM/DD OFDM technology and a simple Reflective Semiconductor Optical Amplifier (RSOA) colorless transmitter are employed and no Dispersion Compensating Fiber (DCF) is needed. Based on the BER results of WDM signals, the proposed WDM-PON system can achieve up to 1.6 Tbit/s (100 Gbit/s/λ × 16 wavelengths) downstream transmission over a 30 km single mode fiber (SMF).
Emerging Optical Broadband Access Networks from TDM PON to OFDM PON
The bandwidth requirements of the telecommunication network users increased rapidly during the last decades. The emerging optical access technologies must provide the bandwidth demand for each user. The passive optical access networks (PONs) support a maximum data rate of 100 Gbps by using the orthogonal frequency division multiplexing (OFDM) technique in the optical access network. In this paper, the enabling optical broadband access networks with many techniques are presented and compared. The architectures, advantages, disadvantages, and main parameters of these access networks are discussed and reported. A combination of different techniques in a hybrid PON network introduces a cost-effective, reliable and efficient access network. The hybrid optical broadband access technologies are presented which have many advantages to become next-generation broadband access networks. The concept and architecture of the hybrid optical broadband access networks are discussed.
Journal of Optical Communications and Networking, 2011
Extending the reach of traditional passive optical network (PON) to 100 km and increasing the split ratio beyond 1:64 are promising solutions in future optical access networks. These systems can accommodate increased users at longer distances potentially at low-cost. With the increasing demand for higher bandwidths, current networks may soon require the bit-rates upgrade to 100 Gb/s and beyond. However, the traditional on-off-keyed PON cannot be scaled up to such bit rates, as very high speed opto-electronic devices are required that are still maturing. Therefore, to provide a comprehensive solution to these scalability issues of existing PONs, we propose a spectrally efficient (4 bit/s/Hz) 100 Gb/s long-reach PON based on 64quadrature-amplitude-modulation (QAM) and frequency-interleaved directly-detected optical orthogonal-frequency-division-multiplexing (FI-DDO-OFDM). We show that the proposed system may operate effectively over 100 km of single mode fiber with a 1024-way-split and a receiver bandwidth of 25 GHz. It is also shown that the system can be provisioned to support even higher number of users (e.g. 2048, 4096 etc) simply by varying the order of QAM with little compromise in bit rates. Moreover, the effects of various link parameters such as laser linewidths, fiber dispersion, filter profiles etc. are also investigated for proper link dimensioning.
An Experimental Assessment of the BSOFDM-PON Architecture
In this paper, we present experimental investigations of a 6 Gbps passive optical networks (PON) based on bandwidth scalable orthogonal frequency division multiplexing (BSOFDMPON). The BSOFDM-PON architecture is composed by an optical line terminal (OLT) and three optical network units (ONUs) located at distances ranging from 25 to 65 km of standard singlemode fibers (SSMF). The influence of the frequency guard band designed to accommodate intermodulation distortions (IMD) inherit of direct-detection optical OFDM (DDO-OFDM) systems is experimentally evaluated. Our results show that this guard band strongly depends on the received optical power (fiber length) and the subcarrier modulation format. An error free transmission in 65 km of SSMF for a scalable bandwidth of 3 GHz occupying 4096 subcarriers mapped in 4QAM is achieved without the frequency gap of the guard band.