A polarization-maintained coupled optoelectronic oscillator（COEO） with its performance significantly improved by a short-length unpumped erbium-doped fiber（EDF） is reported and experimentally investigated.A 10 GHz...A polarization-maintained coupled optoelectronic oscillator（COEO） with its performance significantly improved by a short-length unpumped erbium-doped fiber（EDF） is reported and experimentally investigated.A 10 GHz optical pulse train with a supermode suppression ratio of 61.8 d B and a 10 GHz radio frequency signal with a sidemode suppression ratio of 94 d B and a phase noise of-121.9 d Bc∕Hz at 10 k Hz offset are simultaneously generated. Thanks to saturable absorption of the 1 m unpumped EDF, which introduces relatively large cavity loss to the undesired modes and noise, the supermode suppression ratio and the phase noise are improved by 9.4 and 7.9 d B, respectively.展开更多
基金supported by the National Natural Science Foundation of China(No.61422108)the Natural Science Foundation of Jiangsu Province(No.BK20160082)+1 种基金the Jiangsu Provincial Program for High-level Talents in Six Areas(No.DZXX-030)the Fundamental Research Funds for Central Universities(Nos.NE2017002 and NS2016037)
文摘A polarization-maintained coupled optoelectronic oscillator（COEO） with its performance significantly improved by a short-length unpumped erbium-doped fiber（EDF） is reported and experimentally investigated.A 10 GHz optical pulse train with a supermode suppression ratio of 61.8 d B and a 10 GHz radio frequency signal with a sidemode suppression ratio of 94 d B and a phase noise of-121.9 d Bc∕Hz at 10 k Hz offset are simultaneously generated. Thanks to saturable absorption of the 1 m unpumped EDF, which introduces relatively large cavity loss to the undesired modes and noise, the supermode suppression ratio and the phase noise are improved by 9.4 and 7.9 d B, respectively.
