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Title: System for generating pluralities of optical pulses with predetermined frequencies in a temporally and spatially overlapped relationship

Abstract

Ultrashort (pico second and shorter) laser pulses having components of different frequency which are overlapped coherently in space and with a predetermined constant relationship in time, are generated and may be used in applications where plural spectrally separate, time-synchronized pulses are needed as in wave-length resolved spectroscopy and spectral pump probe measurements for characterization of materials. A Chirped Pulse Amplifier (CPA), such as a regenerative amplifier, which provides amplified, high intensity pulses at the output thereof which have the same spatial intensity profile, is used to process a series of chirped pulses, each with a different central frequency (the desired frequencies contained in the output pulses). Each series of chirped pulses is obtained from a single chirped pulse by spectral windowing with a mask in a dispersive expansion stage ahead of the laser amplifier. The laser amplifier amplifies the pulses and provides output pulses with like spatial and temporal profiles. A compression stage then compresses the amplified pulses. All the individual pulses of different frequency, which originated in each single chirped pulse, are compressed and thereby coherently overlapped in space and time. The compressed pulses may be used for the foregoing purposes and other purposes wherien pulses having a pluralitymore » of discrete frequency components are required. 4 figs.« less

Inventors:
; ;
Issue Date:
OSTI Identifier:
7207310
Patent Number(s):
5095487 A
Application Number:
PPN: US 7-627661
Assignee:
Univ. of Rochester, NY (United States) PTO; EDB-94-082958
DOE Contract Number:  
FC03-85DP40200
Resource Type:
Patent
Resource Relation:
Patent File Date: 14 Dec 1990
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; LASER RADIATION; BEAM SHAPING; AMPLIFICATION; AMPLIFIERS; BEAM PROFILES; COMPRESSION; ELECTROMAGNETIC PULSES; USES; ELECTROMAGNETIC RADIATION; ELECTRONIC EQUIPMENT; EQUIPMENT; PULSES; RADIATIONS; 426002* - Engineering- Lasers & Masers- (1990-)

Citation Formats

Meyerhofer, D.D., Schmid, A.W., and Chuang, Y. System for generating pluralities of optical pulses with predetermined frequencies in a temporally and spatially overlapped relationship. United States: N. p., 1992. Web.
Meyerhofer, D.D., Schmid, A.W., & Chuang, Y. System for generating pluralities of optical pulses with predetermined frequencies in a temporally and spatially overlapped relationship. United States.
Meyerhofer, D.D., Schmid, A.W., and Chuang, Y. Tue . "System for generating pluralities of optical pulses with predetermined frequencies in a temporally and spatially overlapped relationship". United States.
@article{osti_7207310,
title = {System for generating pluralities of optical pulses with predetermined frequencies in a temporally and spatially overlapped relationship},
author = {Meyerhofer, D.D. and Schmid, A.W. and Chuang, Y.},
abstractNote = {Ultrashort (pico second and shorter) laser pulses having components of different frequency which are overlapped coherently in space and with a predetermined constant relationship in time, are generated and may be used in applications where plural spectrally separate, time-synchronized pulses are needed as in wave-length resolved spectroscopy and spectral pump probe measurements for characterization of materials. A Chirped Pulse Amplifier (CPA), such as a regenerative amplifier, which provides amplified, high intensity pulses at the output thereof which have the same spatial intensity profile, is used to process a series of chirped pulses, each with a different central frequency (the desired frequencies contained in the output pulses). Each series of chirped pulses is obtained from a single chirped pulse by spectral windowing with a mask in a dispersive expansion stage ahead of the laser amplifier. The laser amplifier amplifies the pulses and provides output pulses with like spatial and temporal profiles. A compression stage then compresses the amplified pulses. All the individual pulses of different frequency, which originated in each single chirped pulse, are compressed and thereby coherently overlapped in space and time. The compressed pulses may be used for the foregoing purposes and other purposes wherien pulses having a plurality of discrete frequency components are required. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {3}
}