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Title: High peak-power kilohertz laser system employing single-stage multi-pass amplification

Abstract

The present invention describes a technique for achieving high peak power output in a laser employing single-stage, multi-pass amplification. High gain is achieved by employing a very small "seed" beam diameter in gain medium, and maintaining the small beam diameter for multiple high-gain pre-amplification passes through a pumped gain medium, then leading the beam out of the amplifier cavity, changing the beam diameter and sending it back to the amplifier cavity for additional, high-power amplification passes through the gain medium. In these power amplification passes, the beam diameter in gain medium is increased and carefully matched to the pump laser's beam diameter for high efficiency extraction of energy from the pumped gain medium. A method of "grooming" the beam by means of a far-field spatial filter in the process of changing the beam size within the single-stage amplifier is also described.

Inventors:
; ;
Publication Date:
Research Org.:
Kansas State University Research Foundation, Manhattan, KS (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175756
Patent Number(s):
7,050,474
Application Number:
10/656,343
Assignee:
Kansas State University Research Foundation (Manhattan, KS) OSTI
DOE Contract Number:  
FG03-02ER15285
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Shan, Bing, Wang, Chun, and Chang, Zenghu. High peak-power kilohertz laser system employing single-stage multi-pass amplification. United States: N. p., 2006. Web.
Shan, Bing, Wang, Chun, & Chang, Zenghu. High peak-power kilohertz laser system employing single-stage multi-pass amplification. United States.
Shan, Bing, Wang, Chun, and Chang, Zenghu. Tue . "High peak-power kilohertz laser system employing single-stage multi-pass amplification". United States. https://www.osti.gov/servlets/purl/1175756.
@article{osti_1175756,
title = {High peak-power kilohertz laser system employing single-stage multi-pass amplification},
author = {Shan, Bing and Wang, Chun and Chang, Zenghu},
abstractNote = {The present invention describes a technique for achieving high peak power output in a laser employing single-stage, multi-pass amplification. High gain is achieved by employing a very small "seed" beam diameter in gain medium, and maintaining the small beam diameter for multiple high-gain pre-amplification passes through a pumped gain medium, then leading the beam out of the amplifier cavity, changing the beam diameter and sending it back to the amplifier cavity for additional, high-power amplification passes through the gain medium. In these power amplification passes, the beam diameter in gain medium is increased and carefully matched to the pump laser's beam diameter for high efficiency extraction of energy from the pumped gain medium. A method of "grooming" the beam by means of a far-field spatial filter in the process of changing the beam size within the single-stage amplifier is also described.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {5}
}

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