Method and apparatus for shaping a laser pulse

Details Method and apparatus for shaping a laser pulse Method and apparatus for shaping a laser pulse

1997-10-31

1999-11-16

Lee, John D.

Coherent light generators

Particular beam control device

Optical output stabilization

372 10, 372 25, H01S 311

Patent

active

059870427

ABSTRACT:
The invention relates to a method and apparatus for shaping a laser pulse. The method comprises the steps of generating a laser pulse with a laser, opening an optical switch to allow the laser pulse to pass through the optical switch, determining a first reference time point with respect to the laser pulse, determining a second reference time point with respect to the opening of the optical switch, and adjusting an opening time of the optical switch based on the first and second reference time points to shape the laser pulse. The method may be carried out with an apparatus which comprises a laser which generates the laser pulse, a first optical detector which detects the laser pulse and generates a first signal representing the laser pulse, an optical switch through which the laser pulse passes, a second optical detector which detects the laser pulse after the laser pulse has passed through the optical switch, and which generates a second signal representing the laser pulse, a computer which receives the first and second signals and which calculates a delay period based on the first and second signals, and a pulse generator which receives the delay period from the computer and which generates a pulse delayed by the delay period to open the optical switch.

REFERENCES:
patent: 4959838 (1990-09-01), Barnes
patent: 4995044 (1991-02-01), Blazo
patent: 5127019 (1992-06-01), Epstein et al.
patent: 5343483 (1994-08-01), Farrell et al.
Eustace L. Dereniak and Devon G. Crowe, Optical Radiation Detectors, 140-143, 148-149 (1984), John Wiley & Sons, New York.
Warren J. Smith, Modern Optical Engineering, 360-363 (1990), 2nd Ed., McGraw-Hill, New York.

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