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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
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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
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)

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

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