Open AccessAll-polarization-maintaining dual-wavelength mode-locked fiber laser based on Sagnac loop filter
Author(s) -
Runmin Li,
Haosen Shi,
Haochen Tian,
Yuepeng Li,
Bowen Liu,
Yafei Song,
Minglie Hu
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.028302
Subject(s) - optics , fiber laser , materials science , polarization maintaining optical fiber , dispersion shifted fiber , offset (computer science) , mode locking , wavelength , laser , physics , fiber optic sensor , optical fiber , computer science , programming language
We demonstrate an all polarization-maintaining (PM) fiber based dual-wavelength mode-locked Er-fiber laser. A nonlinear amplifying loop mirror (NALM) with an intracavity nonreciprocal phase shifter is used for self-started mode-locking. A short segment of PM fiber is angle-spliced to the NALM, functioning as a PM Sagnac loop filter, thus enabling dual-wavelength mode-locking. The wavelength separation is solely determined by the angle-spliced PM fiber length. Stable dual-wavelength mode-locking operation is switchable between 1570/1581 nm and 1581/1594 nm. The two-color pulse trains oscillating in the same cavity have an inherent offset repetition rate of ~1 kHz owing to cavity dispersion, allowing future high precision dual-comb applications with a simple and robust configuration.