Open Access1 μJ, sub-300 fs pulse generation from a compact thulium-doped chirped pulse amplifier seeded by Raman shifted erbium-doped fiber laser
Author(s) -
Fangzhou Tan,
Hongxing Shi,
Ruoyu Sun,
Peng Wang,
Pu Wang
Publication year - 2016
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.24.022461
Subject(s) - materials science , optics , fiber laser , thulium , laser , femtosecond pulse shaping , femtosecond , amplifier , pulse duration , chirp , pulse (music) , raman spectroscopy , ultrashort pulse , fiber bragg grating , erbium , chirped pulse amplification , optoelectronics , doping , physics , cmos , detector
We present a compact thulium-doped chirped pulse amplifier producing 241 fs pulses with 1 μJ energy. The system is seeded with the Raman shifted soliton generated by the combination of an erbium-doped femtosecond laser and a nonlinear fiber. The Tm-doped large mode area fiber yields output power of 71 W, corresponding to pulse energy of 2.04 μJ, with a slope efficiency of 52.2%. The amplified pulses have been compressed to a duration time of 241 fs, using a folded Treacy grating setup. The pulse energy is measured to be 1.02 μJ, corresponding to a peak power of ~3 MW. To the best of our knowledge, this is the highest average power and pulse energy generated from an all-fiber, Raman shifted soliton seeded thulium-doped chirped pulse amplifier system.