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Title: Phase retrieval and time-frequency methods in the measurement of ultrashort laser pulses

Abstract

Recently several techniques have become available to measure the time- (or frequency-) dependent intensity and phase of ultrashort laser pulses. One of these, Frequency-Resolved Optical Gating (FROG), is rigorous and has achieved single-laser-shot operation. FROG combines the concepts of time-frequency analysis in the form of spectrogram generation (in order to create a two-dimensional problem), and uses a phase-retrieval-based algorithm to invert the experimental data to yield the intensity and phase of the laboratory laser pulse. In FROG it is easy to generate a spectrogram of the unknown signal, and inversion of the spectrogram to recover the signal is the main goal. Because the temporal width of a femtosecond laser pulse is much shorter than anything achievable by electronics, FROG uses the pulse to measure itself. In FROG, the laser pulse is split into two replicas of itself by a partially reflecting beamsplitter, and the two replicas interact with each other in a medium with an instantaneous nonlinear-optical response. This interaction generates a signal field that is then frequency-resolved using a spectrometer. The spectrum of the signal field is measured for all relevant values of the temporal delay between the two pulses. Here, the authors employ FROG and FROG related techniquesmore » to measure the time-dependent intensity and phase of an ultrashort laser pulse.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
28340
Report Number(s):
SAND-95-8458C; CONF-950396-2
ON: DE95006499; TRN: AHC29510%%145
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Signal recovery and synthesis conference, Salt Lake City, UT (United States), 12 Mar 1995; Other Information: PBD: [1995]
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; LASER RADIATION; DIAGNOSTIC TECHNIQUES; MEASURING METHODS; FREQUENCY DEPENDENCE; TIME DEPENDENCE; NONLINEAR OPTICS

Citation Formats

DeLong, K W, Fittinghoff, D N, Ladera, C L, and Trebino, R. Phase retrieval and time-frequency methods in the measurement of ultrashort laser pulses. United States: N. p., 1995. Web.
DeLong, K W, Fittinghoff, D N, Ladera, C L, & Trebino, R. Phase retrieval and time-frequency methods in the measurement of ultrashort laser pulses. United States.
DeLong, K W, Fittinghoff, D N, Ladera, C L, and Trebino, R. 1995. "Phase retrieval and time-frequency methods in the measurement of ultrashort laser pulses". United States. https://www.osti.gov/servlets/purl/28340.
@article{osti_28340,
title = {Phase retrieval and time-frequency methods in the measurement of ultrashort laser pulses},
author = {DeLong, K W and Fittinghoff, D N and Ladera, C L and Trebino, R},
abstractNote = {Recently several techniques have become available to measure the time- (or frequency-) dependent intensity and phase of ultrashort laser pulses. One of these, Frequency-Resolved Optical Gating (FROG), is rigorous and has achieved single-laser-shot operation. FROG combines the concepts of time-frequency analysis in the form of spectrogram generation (in order to create a two-dimensional problem), and uses a phase-retrieval-based algorithm to invert the experimental data to yield the intensity and phase of the laboratory laser pulse. In FROG it is easy to generate a spectrogram of the unknown signal, and inversion of the spectrogram to recover the signal is the main goal. Because the temporal width of a femtosecond laser pulse is much shorter than anything achievable by electronics, FROG uses the pulse to measure itself. In FROG, the laser pulse is split into two replicas of itself by a partially reflecting beamsplitter, and the two replicas interact with each other in a medium with an instantaneous nonlinear-optical response. This interaction generates a signal field that is then frequency-resolved using a spectrometer. The spectrum of the signal field is measured for all relevant values of the temporal delay between the two pulses. Here, the authors employ FROG and FROG related techniques to measure the time-dependent intensity and phase of an ultrashort laser pulse.},
doi = {},
url = {https://www.osti.gov/biblio/28340}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {2}
}

Conference:
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