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Title: Laser amplifier and method

Abstract

Laser amplifiers and methods for amplifying a laser beam are disclosed. A representative embodiment of the amplifier comprises first and second curved mirrors, a gain medium, a third mirror, and a mask. The gain medium is situated between the first and second curved mirrors at the focal point of each curved mirror. The first curved mirror directs and focuses a laser beam to pass through the gain medium to the second curved mirror which reflects and recollimates the laser beam. The gain medium amplifies and shapes the laser beam as the laser beam passes therethrough. The third mirror reflects the laser beam, reflected from the second curved mirror, so that the laser beam bypasses the gain medium and return to the first curved mirror, thereby completing a cycle of a ring traversed by the laser beam. The mask defines at least one beam-clipping aperture through which the laser beam passes during a cycle. The gain medium is pumped, preferably using a suitable pumping laser. The laser amplifier can be used to increase the energy of continuous-wave or, especially, pulsed laser beams including pulses of femtosecond duration and relatively high pulse rate. 7 figs.

Inventors:
; ;
Issue Date:
Research Org.:
Washington State Univ., Pullman, WA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
512431
Patent Number(s):
5,644,424
Application Number:
PAN: 8-619,275
Assignee:
Washington State Univ. Research Foundation, Pullman, WA (United States) PTO; SCA: 426002; PA: EDB-97:112754; SN: 97001827917
DOE Contract Number:  
FG06-93ER12135
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 1 Jul 1997
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; LASERS; LASER RADIATION; LASER MIRRORS; AMPLIFICATION; LASER MATERIALS; DESIGN

Citation Formats

Backus, S., Kapteyn, H.C., and Murnane, M.M. Laser amplifier and method. United States: N. p., 1997. Web.
Backus, S., Kapteyn, H.C., & Murnane, M.M. Laser amplifier and method. United States.
Backus, S., Kapteyn, H.C., and Murnane, M.M. Tue . "Laser amplifier and method". United States.
@article{osti_512431,
title = {Laser amplifier and method},
author = {Backus, S. and Kapteyn, H.C. and Murnane, M.M.},
abstractNote = {Laser amplifiers and methods for amplifying a laser beam are disclosed. A representative embodiment of the amplifier comprises first and second curved mirrors, a gain medium, a third mirror, and a mask. The gain medium is situated between the first and second curved mirrors at the focal point of each curved mirror. The first curved mirror directs and focuses a laser beam to pass through the gain medium to the second curved mirror which reflects and recollimates the laser beam. The gain medium amplifies and shapes the laser beam as the laser beam passes therethrough. The third mirror reflects the laser beam, reflected from the second curved mirror, so that the laser beam bypasses the gain medium and return to the first curved mirror, thereby completing a cycle of a ring traversed by the laser beam. The mask defines at least one beam-clipping aperture through which the laser beam passes during a cycle. The gain medium is pumped, preferably using a suitable pumping laser. The laser amplifier can be used to increase the energy of continuous-wave or, especially, pulsed laser beams including pulses of femtosecond duration and relatively high pulse rate. 7 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {7}
}