Abstract

A wavelength switchable erbium-doped fiber laser was constructed based on an all-fiber Mach–Zehnder interferometer (MZI) comb filter. The MZI consisted of a fiber with two tapers. An L-band erbium-doped fiber was used as the gain medium, and 1557.92, 1563.2, and 1568.06 nm single-wavelength and dual-wavelength switchable lasers at 1558, 1563.7, and 1570.2 nm were realized by adjusting the polarization controller. During scanning, the maxmin power fluctuations of single- and dual-wavelength lasing were 0.604 and 2.482 dB, respectively. The signal-to-noise ratio was >24.46 dB and the laser’s 3 dB linewidth was <0.39 nm.

摘要

基于全光纤马赫曾德尔干涉仪（MZI）梳状滤波器构造了波长可切换的掺do光纤激光器。MZI由具有两个锥度的光纤组成。使用L波段掺fiber光纤作为增益介质，通过调节偏振控制器，实现了1558.92、1563.2和1568.06 nm的1558、1563.7和1570.2 nm单波长和双波长可切换激光器。在扫描期间，单波长和双波长激光的最大最小功率波动分别为0.604和2.482 dB。信噪比> 24.46 dB，激光器的3 dB线宽<0.39 nm。