Work

SBS Mitigation by Manipulating the Injecting Polarization Direction in a High-Power Monolithic PM Amplifier

Year: 2024

Type: article

Abstract: The polarization direction-dependent SBS threshold was investigated, and the terminal polarization control technique was demonstrated to restore the linear polarization state. By increasing the relative angle of the injecting polarization direction from 0° to 90°, the measured SBS threshold increased until reaching a maximum value, beyond which it decreased in a nearly symmetrical trend. The highest SBS threshold was achieved with the relative polarization angle being 45°, delivering a 67% threshold enhancement compared with that at 0°. A quarter-wave-plate was used to restore the polarization state of the output laser manually from an elliptic to a linearly polarized state, and temperature-dependent polarization fluctuation was observed, which intensified as the laser power was scaled. By reducing the cooling temperature, a 1 kW laser with a linearly polarized state was demonstrated using a 45° polarization direction-injected monolithic PM amplifier.

Source: Photonics

DOI: 10.3390/photonics11090890

Authors: Yu Wen, Chun Zhang, Chenxu Liu, Qiuhui Chu, Lingli Huang, Yuan Zhu, Haoyu Zhang, Rumao Tao, Honghuan Lin, Jianjun Wang

Institutions: China Academy of Engineering Physics, Laser Fusion Research Center, Nanjing University of Science and Technology, Nanjing University of Aeronautics and Astronautics

Language: English

Topic: Solid State Laser Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,728

OpenAlex ID: W4402859337

FWCI: 0.208

Cites: 41

Cited by: 2

Related to: 10