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

Patent ·
OSTI ID:1175756
; ;
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.
Research Organization:
Kansas State University Research Foundation, Manhattan, KS (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FG03-02ER15285
Assignee:
Kansas State University Research Foundation (Manhattan, KS)
Patent Number(s):
7,050,474
Application Number:
10/656,343
OSTI ID:
1175756
Country of Publication:
United States
Language:
English

References (6)

High-average-power 2-kHz laser for generation of ultrashort x-ray pulses journal January 2002
Generation of 01-TW 5-fs optical pulses at a 1-kHz repetition rate journal January 1997
100-fs pulse generation and amplification in Ti:Al_2O_3 journal January 1991
Sub-20-fs, kilohertz-repetition-rate Ti:sapphire amplifier journal January 1995
1.1. Terawatt, kilohertz femtosecond laser
  • Bagnoud, V.; Salin, F.
  • Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Edition. CLEO '99. Conference on Lasers and Electro-Optics (IEEE Cat. No.99CH37013) https://doi.org/10.1109/CLEO.1999.833895
conference January 1999
High-average-power kilohertz-repetition-rate sub-100-fs Ti:sapphire amplifier system journal January 1997

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