Open AccessHigh power LP11 mode supercontinuum generation from an all-fiber MOPA
Author(s) -
Xin Yang,
Z. Xu,
Shengping Chen,
Zongfu Jiang
Publication year - 2018
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.26.013740
Subject(s) - supercontinuum , optics , materials science , fiber laser , picosecond , laser , amplifier , optoelectronics , wavelength , photonic crystal fiber , physics , cmos
High power LP 11 mode supercontinuum is generated from 25/250 large mode area (LMA) fiber. A mechanical long period grating (LPG) is utilized to control the transverse modes in the LMA fiber to realize the LP 11 mode supercontinuum generation in a master oscillator power amplifier (MOPA) configuration. The generated LP 11 mode supercontinuum covers the spectral range from ~900 nm to ~2100 nm with a -30-dB spectral width of ~1200 nm and 50% optical to optical conversion efficiency. The seed laser produces picosecond pulses with 1 MHz repetition rate at the wavelength of 1060 nm. After multi-stage amplification in ytterbium-doped fibers, the average output power is scaled to 54.51 W and 56.79 W respectively for LP 11 and LP 01 mode, accompanying supercontinuum generation. Obvious difference of supercontinuum generation between the LP 01 and LP 11 modes is experimentally observed due to the different dispersion characters.