Open AccessSupercontinuum generated in an all-polarization-maintaining random fiber laser structure
Author(s) -
Jiuru He,
Rui Song,
Jiang Li,
Weiping Yang,
Jing Hou
Publication year - 2021
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.434691
Subject(s) - supercontinuum , optics , fiber laser , extinction ratio , laser , polarization (electrochemistry) , linear polarization , materials science , bandwidth (computing) , polarization maintaining optical fiber , optoelectronics , physics , optical fiber , photonic crystal fiber , telecommunications , fiber optic sensor , wavelength , computer science , chemistry
We demonstrated a linearly-polarized supercontinuum (SC) directly generated in an all-polarization-maintaining random fiber laser (RFL) structure. Owing to the comparatively high Raman gain of the polarization-maintaining germanium doped fiber (GDF), the spectrum of the output SC shows an enhanced bandwidth and improved spectral flatness compared to the unpolarized counterpart. The output SC has an average output power of 4.43 W with a spectrum covering from 600 nm to 1900nm. The polarization extinction ratio (PER) is measured to be greater than 18 dB from 800 nm to 1700nm at the highest output power level. To the best of our knowledge, this is the first demonstration of a linearly-polarized SC generated directly from a RFL. This work is meaningful to help further expand the bandwidth of SC generated from a RFL and provides a simple and cost-effective method of generating linearly-polarized SC for practical applications.