Abstract
This Letter presents the results revealing the influence of external optical feedback (EOF) on the alpha factor, or the linewidth enhancement factor, of semiconductor lasers operating on single mode. First, a method is proposed for the measurement of the alpha over a wide range of optical feedback level, which provides an effective way for investigating the dependence of the alpha on laser operating conditions. Second, experimental investigation based on the proposed method is performed on a GaAlAs laser diode with a multiquantum well structure. It is discovered that the alpha value remains approximately constant with increasing injection current, but has a strong dependence on EOF.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Bin Liu, Yuxi Ruan, Yanguang Yu, Bo Wang, and Lei An
Opt. Express 29(3) 3163-3172 (2021)
Yanguang Yu, Jiangtao Xi, and Joe F. Chicharo
Opt. Express 19(10) 9582-9593 (2011)
Chao-Fu Chuang, Yi-Huan Liao, Chih-Hao Lin, Siao-Yu Chen, Frédéric Grillot, and Fan-Yi Lin
Opt. Express 22(5) 5651-5658 (2014)