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

Patent · Wed Jan 01 00:00:00 EST 1992

OSTI ID:868187

Meyerhofer, David D ^[1]; Schmid, Ansgar W ^[2]; Chuang, Yung-ho ^[3]

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1. Spencerport, NY
2. Honeoye Falls, NY
3. Rochester, NY

Ultra short (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.

• Research Organization: Univ. of Rochester, NY (United States)
• DOE Contract Number: FC03-85DP40200
• Assignee: University of Rochester (Rochester, NY)
• Patent Number(s): US 5095487
• OSTI ID: 868187
• Country of Publication: United States
• Language: English

Related Subjects

generating
pluralities
optical
pulses
predetermined
frequencies
temporally
spatially
overlapped
relationship
ultra
pico
shorter
laser
components
frequency
coherently
space
constant
time
generated
applications
plural
spectrally
separate
time-synchronized
wave-length
resolved
spectroscopy
spectral
pump
probe
measurements
characterization
materials
chirped
pulse
amplifier
cpa
regenerative
provides
amplified
intensity
output
spatial
profile
process
series
central
desired
contained
obtained
single
windowing
mask
dispersive
expansion
stage
ahead
amplifies
temporal
profiles
compression
compresses
individual
originated
compressed
foregoing
purposes
wherien
plurality
discrete
required
optical pulse
frequency components
spatial intensity
output pulses
optical pulses
laser pulses
output pulse
laser pulse
laser amplifier
intensity profile
regenerative amplifier
amplifier amplifies
provides output
frequency component
desired frequencies
discrete frequency
expansion stage
predetermined frequencies
amplified pulse
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