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Title: Spectrally tunable, temporally shaped parametric front end to seed high-energy Nd:glass laser systems

Abstract

Here, we describe a parametric-amplification–based front end for seeding high-energy Nd:glass laser systems. The front end delivers up to 200 mJ by parametric amplification in 2.5-ns flat-in-time pulses tunable over more than 15 nm. Spectral tunability over a range larger than what is typically achieved by laser media at similar energy levels is implemented to investigate cross-beam energy transfer in multibeam target experiments. The front-end operation is simulated to explain the amplified signal’s sensitivity to the input pump and signal. A large variety of amplified waveforms are generated by closed-loop pulse shaping. Various properties and limitations of this front end are discussed.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1400335
Report Number(s):
2017-190, 1357
Journal ID: ISSN 1094-4087; OPEXFF; 2017-190, 2315, 1357
Grant/Contract Number:
NA0001944
Resource Type:
Journal Article: Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 25; Journal Issue: 22; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Parametric oscillators and amplifiers; Lasers

Citation Formats

Dorrer, C., Consentino, A., Cuffney, R., Begishev, I. A., Hill, E. M., and Bromage, J. Spectrally tunable, temporally shaped parametric front end to seed high-energy Nd:glass laser systems. United States: N. p., 2017. Web. doi:10.1364/OE.25.026802.
Dorrer, C., Consentino, A., Cuffney, R., Begishev, I. A., Hill, E. M., & Bromage, J. Spectrally tunable, temporally shaped parametric front end to seed high-energy Nd:glass laser systems. United States. doi:10.1364/OE.25.026802.
Dorrer, C., Consentino, A., Cuffney, R., Begishev, I. A., Hill, E. M., and Bromage, J. 2017. "Spectrally tunable, temporally shaped parametric front end to seed high-energy Nd:glass laser systems". United States. doi:10.1364/OE.25.026802.
@article{osti_1400335,
title = {Spectrally tunable, temporally shaped parametric front end to seed high-energy Nd:glass laser systems},
author = {Dorrer, C. and Consentino, A. and Cuffney, R. and Begishev, I. A. and Hill, E. M. and Bromage, J.},
abstractNote = {Here, we describe a parametric-amplification–based front end for seeding high-energy Nd:glass laser systems. The front end delivers up to 200 mJ by parametric amplification in 2.5-ns flat-in-time pulses tunable over more than 15 nm. Spectral tunability over a range larger than what is typically achieved by laser media at similar energy levels is implemented to investigate cross-beam energy transfer in multibeam target experiments. The front-end operation is simulated to explain the amplified signal’s sensitivity to the input pump and signal. A large variety of amplified waveforms are generated by closed-loop pulse shaping. Various properties and limitations of this front end are discussed.},
doi = {10.1364/OE.25.026802},
journal = {Optics Express},
number = 22,
volume = 25,
place = {United States},
year = 2017,
month =
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1364/OE.25.026802

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  • Here, we describe a parametric-amplification–based front end for seeding high-energy Nd:glass laser systems. The front end delivers up to 200 mJ by parametric amplification in 2.5-ns flat-in-time pulses tunable over more than 15 nm. Spectral tunability over a range larger than what is typically achieved by laser media at similar energy levels is implemented to investigate cross-beam energy transfer in multibeam target experiments. The front-end operation is simulated to explain the amplified signal’s sensitivity to the input pump and signal. A large variety of amplified waveforms are generated by closed-loop pulse shaping. Various properties and limitations of this front endmore » are discussed.« less
  • A high-contrast preamplifier, based on ultrafast-optical-parametric amplification with a short pump pulse, is demonstrated. The energy gain and the high contrast of this preamplifier make it an ideal candidate as a seed source for high-power laser systems.
  • Nearly transform-limited femtosecond pulses tunable from 635 to 3000 nm were generated by a traveling-wave type II phase-matching barium borate parametric generator pumped by the self-compressed second harmonic of a Nd:glass laser. A total conversion efficiency of 10% with output pulses as short as 200 fs has been achieved. Numerical simulation indicated that the relative amount of energy contained in the output pulse wings was reduced by {similar_to}4{times}10{sup 4} compared with that in the pump. {copyright} {ital 1995} {ital Optical} {ital Society} {ital of} {ital America}.
  • Ultrafast subpicosecond laser exposure usually induces negative refractive index changes in optical glasses with strong thermal expansion such as borosilicate BK7 due to volume expansion and mechanical rarefaction. We show that temporally shaped laser excitation on picosecond scales and at high repetition rates can invert the regular material response resulting in a significant refractive index increase. Simulations of pulse propagation and evolution of heat and strain waves in BK7 glass exposed to different pulse durations were performed to understand mechanisms of refractive index increase. Narrow spatial distribution of energy for optimized picosecond pulses determines shock-induced plastic deformations accompanied by partialmore » healing of the lateral strain due to preferential heat flow. The matter momentum relaxation produces directional on-axis material compaction.« less
  • The paper proposes a method for the formation of tunable, spectrally limited, ultrashort light pulses on the basis of the spectral filtering of phase-modulated light in an optical waveguide. The proposed method can also be used to increase the contrast of the output of mode-locked lasers. In the production of second-harmonic pulses, the role of the spectral slit which selects the spectral components can be played by the width of the phase matching of the second-harmonic crystal. In effect the diffraction grating can be eliminated so that the experimental implementation of the method can be simplified. 7 references.