670 W Single-frequency Retrievable Multi-tone All-fiber MOPA
We demonstrated a single-frequency retrievable multi-tone all-fiber laser in master oscillator power-amplification(MOPA)configuration with the highest recorded power of 670 W.The seed laser runs in multi-tone regime by phase modulating a single-frequency fiber laser using a sine wave signal.Power amplification of the multi-tone master oscillator is then implemented by four cascaded all-fiber power amplifier and a power scaling up to 670 W is achieved.A proof-of-concept experiment for retrieving single-frequency laser from the high power multi-tone laser is carried out by implementing a demodulation signal,which is Π phase shift of the modulation signal,on the output laser at a relative low power level.Results indicated that the single-frequency laser can be retrieved with a sideband suppression of more than 20 dB at the power level of 670 W.This method may provide a feasible way for power scaling of single-frequency laser over the SBS limitation in fiber amplifier.
X.L.Wang P.Zhou R.M.Tao R.T.Su X.J.Xu
College of Optoelectronic Science and Engineering National University of Defense Technology(NUDT),Changsha,China
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
2289-2293
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）