In:
Journal of Nanoelectronics and Optoelectronics, American Scientific Publishers, Vol. 18, No. 6 ( 2023-06-01), p. 705-710
Abstract:
Nonlinear effect in an ultrafast fiber laser has always been a major obstacle in realization of laser with narrow pulse width and high energy. To achieve higher peak power, we herein introduce pre-chirping management and pre-amplification before the chirped pulse amplification (CPA)
system. The self-phase modulation effect is used to effectively stretch the spectrum when the pulse reaches a high peak power, and then the parabolic pulse and spectrum are obtained in a fiber amplifier. This parabolic pulse effectively reduces the impact of nonlinear effect in subsequent fiber amplifier and realizes the amplification of chirped pulse with a higher peak power compared with conventional CPA system. We finally achieved a mode-locked pulse with 143 fs pulse duration, 8.57 W average power, 85.7 μ J single pulse energy, M 2 〈 1.10 beam quality,
and without obvious pulse degeneration. The reported pulse energy is the highest among all-fiber CPA systems based on nonlinear amplification technology.
Type of Medium:
Online Resource
ISSN:
1555-130X
DOI:
10.1166/jno.2023.3416
Language:
English
Publisher:
American Scientific Publishers
Publication Date:
2023