Coherent light generators – Particular beam control device – Q-switch
Patent
1998-03-11
1999-12-28
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Q-switch
372 25, 372 22, H01S 311
Patent
active
06009110&
ABSTRACT:
Pulse recovery times are reduced in a pulsed intracavity frequency-converted laser by operating the laser in a continuous-wave (c.w.) mode before operation in a Q-switched mode. C.w. light locally optically heats the frequency-conversion optics of the laser to facilitate phase-matching at the beginning of Q-switched operation. C.w. operation also reduces the amplitude of the first pulse of the subsequent firing sequence by expending population inversion accumulating in the gain medium. Operation in c.w. mode is initiated by ramping up the net optical gain in the laser cavity when the time elapsed since the latest emitted pulse exceeds 110% of the interpulse spacing prior to the latest pulse. Initiation of c.w. operation does not require external signals other than optionally a pulse trigger sequence from the user. Cavity optical losses may be increased immediately prior to the first pulse, for accumulating population inversion and increasing the first pulse to a desired level. Frequency doubling and tripling lithium triborate (LBO) crystals were used with a Nd-YAG solid state medium to generate ultraviolet light at 355 nm from infrared light at 1064 nm.
REFERENCES:
patent: 4019159 (1977-04-01), Hon et al.
patent: 4337442 (1982-06-01), Mauck
patent: 5016251 (1991-05-01), D'Arcy
patent: 5128601 (1992-07-01), Orbach et al.
patent: 5157676 (1992-10-01), Wilcox
patent: 5157677 (1992-10-01), Narhi et al.
patent: 5168503 (1992-12-01), Maeda
patent: 5226051 (1993-07-01), Chan et al.
patent: 5291505 (1994-03-01), Nielson
patent: 5339323 (1994-08-01), Hunter et al.
patent: 5365532 (1994-11-01), Klaras et al.
patent: 5383209 (1995-01-01), Hwang
patent: 5399323 (1995-03-01), Hunter et al.
patent: 5671232 (1997-09-01), Lee et al.
Adams Frank J.
Kmetec Jeffrey D.
Wiechmann Werner H.
Jr. Leon Scott
Lightwave Electronics Corporation
LandOfFree
Pulse amplitude control in frequency-converted lasers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pulse amplitude control in frequency-converted lasers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulse amplitude control in frequency-converted lasers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2387228