Design of Reflective Semiconductor Optical Amplifier-Based Wavelength-Division-Multiplexed Passive Optical Networks

• Main Authors: Ting-Lin Hsieh, 謝廷霖
• Other Authors: Chun-Liang Yang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/06999704545029191926

碩士 === 淡江大學 === 電機工程學系碩士班 === 97 === Abstract: The latest development in passive optical network systems is evolving toward higher data rates and long-reach transmission distances, where wavelength-division-multiplexed passive optical networks (WDM-PONs) can be very attractive solutions. In order to reduce the cost of WDM-PON system, many WDM-PON architectures with colorless light were proposed. Additionally, an reflective semiconductor optical amplifier (RSOA) is a very popular colorless source to be utilized in an optical network unit (ONU). Thus in this thesis we proposed novel WDM-PON architectures based on RSOAs, which use 10 Gbps directly modulated lasers (DMLs) as the transmitters of an OLT, a single 1.25 Gbps RSOA as a transmitter of an ONU and Fabry-Perot filters as waveform reshapers, whose transmission and reflection filtering can be utilized to achieve the functions of simultaneous extinction ratio enhancement and data erasion. In experiments, the bit-error-rate (BER) measurement verifies the performance enhancement to the downstream and upstream signals. After transmission of 25 km and at the requirement for BER=10-9, for 10-Gbps downstream signal the decrease in the power penalty is better than 1.8 dB and for 1.25-Gbps upstream signal only 0.5 dB power penalty is observed by comparing the result with the re-modulated upstream signals using an additional CW pilot light. Compared to the transmission without data erasion, our scheme reduces the power penalty by about 1.4 dB. Finally we proposed the protection architecture of novel RSOA-based WDM-PON, whose feeder fibers and distribution fibers can be protected simultaneously.