新型副载波调制EDFA远程在线监控技术的原理论证

从理论和实验上论证了一种用于掺铒光纤放大器 (EDFA)远程在线监控和判断级连EDFA系统级间断点位置的技术方案。该方案利用频移键控 频分复用 (FSK FDM)技术进行声频副载波调制 ,通过光强度调制实现远程在线EDFA监控信息随主信号的传输。实验测得在副载波调制度为 3 %和 15 %时 ,10Gbit s波分复用 (WDM)光传输系统的功率代价分别为 0 16dB和 0 86dB。采用锁相技术 ,成功进行了 3 %调制度的监控信息解调。说明该方案可以实现对 5级EDFA系统的监控

Demonstration on Remote in-Service Supervision for in-Line EDFAs Based on Subcarrier Modulation

A novel scheme for remote supervision of in-line EDFA and fault-location in EDFA cascaded system based on subcarrier modulation is theoretically proposed and experimentally demonstrated. In the scheme, FSK-FDM technique is used in subcarrier modulation, and the EDFA’s supervisory information is transmitted by optical intensity modulation. In this 10 Gbit/s WDM transmission experiments, the system power penalty was 0.16 dB and 0.86 dB, while the subcarrier modulation degree was 3% and 15% respectively. With the technique of phase-lock, demodulation of supervisory information was realized while the modulation degree was 3%. The conclusion comes that this scheme can be applied in a long-haul WDM transmission system with five EDFAs cascaded.