Open AccessSpectral Purity Improvement by Combining Self-Injection Locking and Stimulated Thermal Rayleigh Scattering in Fiber Lasers
Author(s) -
Hong Dang,
Kunpeng Feng,
Jiwen Cui,
Yuanhang Zhang,
Xun Sun,
Wenlei Yang,
Jiubin Tan
Publication year - 2018
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2018.2803144
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
A stimulated thermal Rayleigh scattering (STRS)-based self-injection locking technique is proposed and utilized in fiber laser to improve its spectral purity. Both theoretical and experimental analyses of the STRS-based filter and the interaction mechanism between the STRS-based filter and self-injection locking are demonstrated in detail. These analyses verify effects of the proposed method on single-longitudinal-mode (SLM) selection and linewidth compression. A fiber laser employing STRS-based self-injection locking configuration is designed, and a significant improvement of spectral purity comparing to commercially available lasers is achieved. Experimental results indicate that this fiber laser operates at SLM regime and has a linewidth of 45 Hz, and can be widely applied in distributed sensing, optical communication, and high-resolution optical spectrum analysis.