Coherent light generators – Particular beam control device – Optical output stabilization
Patent
1998-06-05
2000-10-31
Healy, Brian
Coherent light generators
Particular beam control device
Optical output stabilization
372 21, 372 25, 372 26, 372 29, H01S 313
Patent
active
061413623
ABSTRACT:
A pulsed laser is provided wherein the B-integral accumulated in the laser pulse is reduced using a semiconductor wafer. A laser pulse is generated by a laser pulse source. The laser pulse passes through a semiconductor wafer that has a negative nonlinear index of refraction. Thus, the laser pulse accumulates a negative B-integral. The laser pulse is then fed into a laser amplification medium, which has a positive nonlinear index of refraction. The laser pulse may make a plurality of passes through the laser amplification medium and accumulate a positive B-integral during a positive non-linear phase change. The semiconductor and laser pulse wavelength are chosen such that the negative B-integral accumulated in the semiconductor wafer substantially cancels the positive B-integral accumulated in the laser amplification medium. There may be additional accumulation of positive B-integral if the laser pulse passes through additional optical mediums such as a lens or glass plates. Thus, the effects of self-phase modulation in the laser pulse are substantially reduced.
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Konoplev Oleg A.
Meyerhofer David D.
Daubenspeck William C.
Drew Gary R.
Healy Brian
Moser William R.
The United States of America as represented by The United States
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