Coherent light generators – Particular resonant cavity – Specified output coupling device
Patent
1993-08-26
1994-11-01
Bovernick, Rodney B.
Coherent light generators
Particular resonant cavity
Specified output coupling device
372 22, 372 41, H01S 308
Patent
active
053612752
ABSTRACT:
In order to improve an apparatus for removing material from a target, comprising a high-power laser generating laser pulses with a pulse duration in the picosecond range and comprising a resonator, in which a mode-locking device and a Q-switch are arranged, a frequency multiplier following the high-power laser and a beam guide for focusing the laser beam coming from the frequency multiplier onto the target, such that the energy in the single laser pulses having a pulse duration in the picosecond range is as high as possible, it is suggested that the resonator have fully reflecting end mirrors for generating single high-energy laser pulses, that a system for the controlled coupling out of single pulses be arranged in the resonator and that a control be provided for coupling out a single pulse following release of the laser activity by the Q-switch and the build up of the single pulse after repeated round trips through the resonator.
REFERENCES:
patent: 4979180 (1990-12-01), Muncheryan
patent: 5144630 (1992-09-01), Lin
R. J. D. Miller, et al., "Efficient Operation of a Cavity Dumped Q-Switched and Mode-Locked YAG Laser," Optics Communications, vol. 62, No. 3, May 1, 1987, pp. 185-189.
S. D. Savov, et al., "Electro-optically Controlled Mode-Locked Nd: YAG Laser System," Optics and Laser Technology, Aug., 1981, pp. 193-196.
J. M. Dawes, et al., "A High Repetition Rate Pico-Synchronous Nd; YAG Laser," Optics Communications, vol. 65, No. 4, Feb. 15, 1988, pp. 275-278.
M. S. Demokan, "Mode-Locking in Solid-State and Semiconductor Lasers," Research Studies Press, J. Wiley & Sons Ltd., Chichester, England, Jan. 1982, pp. 149-152.
Bovernick Rodney B.
Deutsche Forschungsanstalt fuer Luft-und Raumfahrt e.V.
Lipsitz Barry R.
Wise Robert E.
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