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Title: Method and apparatus for measuring the intensity and phase of an ultrashort light pulse

Patent ·
OSTI ID:871564
 [1];  [2]
  1. Santa Fe, NM
  2. Livermore, CA
+ Show Author Affiliations

The pulse shape I(t) and phase evolution x(t) of ultrashort light pulses are obtained using an instantaneously responding nonlinear optical medium to form a signal pulse. A light pulse, such a laser pulse, is split into a gate pulse and a probe pulse, where the gate pulse is delayed relative to the probe pulse. The gate pulse and the probe pulse are combined within an instantaneously responding optical medium to form a signal pulse functionally related to a temporal slice of the gate pulse corresponding to the time delay of the probe pulse. The signal pulse is then input to a wavelength-selective device to output pulse field information comprising intensity vs. frequency for a first value of the time delay. The time delay is varied over a range of values effective to yield an intensity plot of signal intensity vs. wavelength and delay. In one embodiment, the beams are overlapped at an angle so that a selected range of delay times is within the intersection to produce a simultaneous output over the time delays of interest.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
DOE Contract Number:
W-7405-ENG-36
Assignee:
Regents of University of California (Los Alamos, NM); Sandia National Laboratory (Los Alamos, NM)
Patent Number(s):
US 5754292
OSTI ID:
871564
Country of Publication:
United States
Language:
English

References (5)

Femtosecond pulse phase measurement by spectrally resolved up-conversion: application to continuum compression journal January 1992
Fourth-order partial-coherence effects in the formation of integrated-intensity gratings with pulsed light sources journal January 1986
Single-shot characterization of ultrashort light pulses journal August 1991
Direct determination of the amplitude and the phase of femtosecond light pulses journal January 1991
Chirp and self-phase modulation in induced-grating autocorrelation measurements of ultrashort pulses journal January 1990

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Related Subjects

method
apparatus
measuring
intensity
phase
ultrashort
light
pulse
shape
evolution
pulses
obtained
instantaneously
responding
nonlinear
optical
medium
form
signal
laser
split
gate
probe
delayed
relative
combined
functionally
related
temporal
slice
corresponding
time
delay
input
wavelength-selective
device
output
field
information
comprising
vs
frequency
value
varied
range
values
effective
yield
plot
wavelength
embodiment
beams
overlapped
angle
selected
times
intersection
produce
simultaneous
delays
probe pulse
selected range
time delays
functionally related
pulse shape
time delay
light pulses
output pulse
laser pulse
nonlinear optical
light pulse
delay time
optical medium
gate pulse
signal pulse
ultrashort light
delay times
pulse field
responding optical
nonlinear optic
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