Institution:University of Ottawa

Title of Paper:Single-mode SOA-based 1kHz-linewidth dual-wavelength random fiber laser

Journal:Optics Express

Summary:Narrow-linewidth multi-wavelength fiber lasers are of significant interests for fiber-optic sensors, spectroscopy, optical communications, and microwave generation. A novel narrow-linewidth dual-wavelength random fiber laser with single-mode operation, based on the semiconductor optical amplifier (SOA) gain, is achieved in this work for the first time, to the best of our knowledge. A simplified theoretical model is established to characterize such kind of random fiber laser. The inhomogeneous gain in SOA mitigates the mode competition significantly and alleviates the laser instability, which are frequently encountered in multi-wavelength fiber lasers with Erbium-doped fiber gain. The enhanced random distributed feedback from a 5km non-uniform fiber provides coherent feedback, acting as mode selection element to ensure single-mode operation with narrow linewidth of ~1kHz. The laser noises are also comprehensively investigated and studied, showing the improvements of the proposed random fiber laser with suppressed intensity and frequency noises.

First Author:Yanping Xu

Correspondence Author:Xiaoyi Bao

All the Authors:Liang Zhang,Liang Chen

Discipline:Engineering

First-Level Discipline:Optical Engineering

Document Type:J

Volume:25

Issue:14

Page Number:15828-15837

Translation or Not:No

Date of Publication:2017-06

Included Journals:SCI

Release Time:2020-04-07