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학술지 All-Optical Gain-Clamped EDFA Using External Saturation Signal for Burst-Mode Upstream in TWDM-PONs
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저자
이한협, 이종현, 이상수
발행일
201407
출처
Optics Express, v.22 no.15, pp.18186-18194
ISSN
1094-4087
출판사
Optical Society of America(OSA)
DOI
https://dx.doi.org/10.1364/OE.22.018186
협약과제
14MI9300, (통합)대용량 WDM 액세스망핵심 및 선행기술개발, 이상수
초록
While the gain-transient suppression of erbium-doped fiber amplifiers (EDFAs) has been widely studied, the large interval between upstream burst-mode signals from optical network units (ONUs) in time- and wavelength-division multiplexing passive optical networks (TWDM-PONs) presents new challenges. A non-gain-clamped EDFA acting as a preamplifier does not have the desired overshoot on the burst-mode signal when there are only a few ONUs in operation in the TWDM-PON. To solve this problem, we propose an all-optical gain-clamped EDFA (OGC-EDFA) that uses a distributed feedback laser diode to generate a saturation signal. An OGC-EDFA based on a ring laser configuration was also tested to compare the overshoot performance; the both OGC-EDFAs showed negligible overshoot performance. Given the negligible overshoot and wide input dynamic range of the OGC-EDFA, the proposed amplifier is thought to be a simple, low-cost solution for TWDM-PON applications. © 2014 Optical Society of America.
KSP 제안 키워드
Distributed feedback laser diode, Distributed feedback lasers(DFBs), Laser diode(LD), Low-cost, Optical Gain, Optical network unit(ONU), Passive optical network, TWDM-PON, Wavelength Division Multiplexing(WDM), all-optical, burst mode