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Aberration-free, all-reflective laser pulse stretcher

Patent ·
OSTI ID:872554
 [1];  [1];  [2];  [1]
  1. Livermore, CA
  2. Fremont, CA
+ Show Author Affiliations
An all-reflective pulse stretcher for laser systems employing chirped-pulse amplification enables on-axis use of the focusing mirror which results in ease of use, significantly decreased sensitivity to alignment and near aberration-free performance. By using a new type of diffraction grating which contains a mirror incorporated into the grating, the stretcher contains only three elements: 1) the grating, 2) a spherical or parabolic focusing mirror, and 3) a flat mirror. Addition of a fourth component, a retro-reflector, enables multiple passes of the same stretcher resulting in stretching ratios beyond the current state of the art in a simple and compact design. The pulse stretcher has been used to stretch pulses from 20 fsec to over 600 psec (a stretching ratio in excess of 30,000).
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
DOE Contract Number:
W-7405-ENG-48
Assignee:
Regents of University of California (Oakland, CA)
Patent Number(s):
US 5960016
Application Number:
08/869345
OSTI ID:
872554
Country of Publication:
United States
Language:
English

References (9)

Quintic-phase-limited, spatially uniform expansion and recompression of ultrashort optical pulses journal January 1993
Design and performance of a multiterawatt, subpicosecond neodymium:glass laser journal January 1991
Terawatt Ti:sapphire laser with a spherical reflective-optic pulse expander journal January 1995
Terawatt to Petawatt Subpicosecond Lasers journal May 1994
Chirped-pulse amplification of 55-fs pulses at a 1-kHz repetition rate in a Ti:Al_2O_3 regenerative amplifier journal January 1993
3000 times grating compressor with positive group velocity dispersion: Application to fiber compensation in 1.3-1.6 µm region journal January 1987
Temporal aberrations due to misalignments of a stretcher-compressor system and compensation journal July 1994
Aberration-free stretcher design for ultrashort-pulse amplification journal January 1996
1000 times expansion/compression of optical pulses for chirped pulse amplification journal June 1987

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