Degradation of temporal contrast from post-pedestal interference with a chirped pulse in an optical parametric amplifier

Webb, B.; Feng, C.; Dorrer, C.; Jeon, C.; Roides, R. G.; Bucht, S.; Bromage, J.

doi:10.1364/OE.518096

Title: Degradation of temporal contrast from post-pedestal interference with a chirped pulse in an optical parametric amplifier

Journal Article · 19 March 2024 · Optics Express

DOI: https://doi.org/10.1364/OE.518096 · OSTI ID:2426681

; Feng, C.;

; Jeon, C.; Roides, R. G.; Bucht, S.;

Pre-pedestal generation is observed in a 0.35-PW laser front end coming from a post-pedestal via instantaneous gain and pump depletion in an optical parametric amplifier during chirped-pulse amplification. Generalized simulations show how this effect arises from gain nonlinearity and applies to all optical parametric chirped-pulse–amplification systems with a post-pedestal. An experiment minimizing the effect of B -integral is used to isolate and study the newly observed conversion of a continuous post-pedestal into a continuous pre-pedestal. Matching numerical simulations confirm experimental results and additionally reveal how third-order dispersion largely controls the slope of the generated pre-pedestal.

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Research Organization:: University of Rochester, NY (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0004144

OSTI ID:: 2426681

Journal Information:: Optics Express, Journal Name: Optics Express Journal Issue: 7 Vol. 32; ISSN 1094-4087; ISSN OPEXFF

Publisher:: Optical Society of AmericaCopyright Statement

Country of Publication:: United States

Language:: English

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