Chinese Optics Letters, 2011, 9 (4): 041404, Published Online: Mar. 30, 2011
Phase noise measurement of high-power fiber amplifiers Download: 871次
光纤放大器 相干合成 相位噪声 多抖动法 结构函数 060.2320 Fiber optics amplifiers and oscillators 140.3290 Laser arrays 140.3510 Lasers, fiber
Abstract
We measure the phase fluctuation in a high-power fiber amplifier using a multi-dithering technique. Its fluctuation property is qualitatively analyzed by the power spectral density and integrated spectral density. Low frequency fluctuations caused by the environment are dominant in the phase fluctuations in an amplifier, whereas the high frequency components related to laser power affect the control bandwidth. The bandwidth requirement of the active phase-locking is calculated to be 300 Hz, 670 Hz, 1.6 kHz, and 3.9 kHz under the output power of 25, 55, 125, and 180 W, respectively. The approximately linear relationship between the control bandwidth and laser power needs to be further investigated.
Hu Xiao, Xiaolin Wang, Yanxing Ma, Bing He, Pu Zhou, Jun Zhou, Xiaojun Xu. Phase noise measurement of high-power fiber amplifiers[J]. Chinese Optics Letters, 2011, 9(4): 041404.