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학술대회 Wavelength Re-use Scheme with Reflective SOA for WDM-PON Link
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유제훈, 김병휘, 김남
International Conference on Advanced Communication Technology (ICACT) 2008, pp.1704-1710
08MR2300, 메트로-액세스 전광 통합망 기술개발, 이상수
Among the various solutions to the optical subscriber network realization, the wavelength-division-multiplexed passive optical network(WDM-PON) has been considered as an ultimate next-generation solution. This article presents the wavelength re-use scheme with the reflective semiconductor optical amplifier(RSOA), which has recently been developed for application to the WDM-PON. The wavelength re-use scheme has a common feature that the optical signal modulated with downstream data is re-used to carry the upstream data through the RSOA in the subscriber-side equipment by a series of processes such as being flattened out, reflected at the rear facet of the RSOA, and then re-modulated with upstream data. The major advantage with the wavelength re-use scheme would be the possibility of realizing the simplest WDM-PON optical link structure, which is directly reflected on cost-effectiveness of the network both in equipment and maintenance costs. The gain saturation scheme is presented here; it uses the fact that the optical gain of RSOA decreases as the injection power into RSOA increases. Experimental results show that it is possible to achieve error-free bidirectional transmission with 1.25 Gbps for upstream and 2.5 Gbps for downstream data rates over 20 km transmission distance.
KSP 제안 키워드
25 Gbps, Bidirectional transmission, Cost-effectiveness, Link structure, Maintenance cost, Next-generation, Optical Gain, Optical signal, Reflective Semiconductor Optical Amplifier, Semiconductor optical amplifiers(SOAs), Transmission distance