Open AccessGeneration of 64-fs L-band stretched pulses from an all-fibre Er-doped laser
Author(s) -
Zinan Huang,
Sonia Boscolo,
Qianqian Huang,
Zhikun Xing,
Zhijun Yan,
Tao Chen,
Yunqi Liu,
Chengbo Mou
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.434546
Subject(s) - optics , materials science , laser , fiber laser , polarizer , erbium , ultrashort pulse , pulse duration , dispersion (optics) , subwavelength diameter optical fibre , wavelength , optoelectronics , physics , birefringence
We demonstrate an L-band all-fibre erbium-doped laser mode locked by nonlinear polarisation rotation and working in the stretched-pulse regime. The use of a single segment of gain fibre with appropriate length and dispersion and a Brewster fibre grating optimised for the L band as an in-fibre polariser enables the generation of pulses at 1.59-μm central wavelength, which can be linearly compressed to 64-fs duration. Numerical simulations of the laser model support our experimental findings. Our laser design gives a route towards low-cost and low-complexity fibre-integrated laser sources for applications requiring L-band ultrashort pulses.