Method of and apparatus for generating intracavity double raman shifted laser pulses
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 9, 1997
Grant Date -
N/A
app pub date -
Oct 25, 1995
filing date -
May 9, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus performs a method of generating one output laser pulses in a range of 2 to 5 microns using an intracavity feature. When a plurality of the output laser pulses are generated, a first output pulse may have any selected wavelength within the range and a second output pulse is temporally closely spaced relative to the first output pulse and may have a chosen wavelength differing from the selected wavelength. A pump laser cavity is provided with a tunable rod and an intracavity Raman device (in the pump cavity) to shift the wavelength of initial pump laser pulses. The intracavity Raman device generates radiation at first and second Stokes wavelengths, and the pulses at each wavelength are separated and are in separate paths for permitting separate operation thereon. The Raman device in the pump cavity increases the pump intensity inside the Raman cell and gives a much longer effective interaction length between the pump laser beam and the Raman medium. A first Stokes cavity for the first Raman shift overlaps the pump cavity such that the intensity in the first Stokes cavity is increased. A second Stokes cavity overlaps the pump cavity and is provided with one highly reflecting end mirror and one partially reflecting end mirror which serves as an output coupler for the output pulse which is in the wavelength range from 2 to 5 microns.
First Claim
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