Xu S H, Yang Z M, Liu T, Zhang W N, Feng Z M, Zhang Q Y, Jiang Z H
Institute of Optical Communication Materials, South China University of Technology, GuangZhou, P. R. China.
Opt Express. 2010 Jan 18;18(2):1249-54. doi: 10.1364/OE.18.001249.
An efficient single frequency fiber laser by using a newly-developed Er(3+)/Yb(3+) co-doped single mode phosphate glass fiber with the net gain coefficient of 5.2 dB/cm and propagation loss coefficient of 0.04 dB/cm has been demonstrated. Over 300 mW stable continuous -wave single transverse and longitudinal mode seed lasering at 1.5 microm has been achieved from a 2.0 cm-long active fiber. The measured slope efficiency and the calculated quantum efficiency of laser emission are found to be 30.9% and 0.938 +/- 0.081, respectively. It is found that the linewidth of the fiber laser is less than 2 kHz, and the measured relative intensity noise (RIN) is around -120 dB/Hz in the frequency range of 50 to 500 kHz.
利用新研制的净增益系数为5.2 dB/cm、传输损耗系数为0.04 dB/cm的掺铒(3+)/镱(3+)单模磷酸盐玻璃光纤，演示了一种高效单频光纤激光器。从2.0厘米长的有源光纤中实现了超过300毫瓦的稳定连续波单横模和纵模种子激光，波长为1.5微米。测得的激光发射斜率效率和计算出的量子效率分别为30.9%和0.938±0.081。发现该光纤激光器的线宽小于2千赫，在50至500千赫的频率范围内测得的相对强度噪声(RIN)约为-120分贝/赫兹。
