Coherent light generators – Particular pumping means – Pumping with optical or radiant energy
Patent
1987-03-24
1987-10-20
Scott, Jr., Leon
Coherent light generators
Particular pumping means
Pumping with optical or radiant energy
372 22, 372 9, 372108, 372 27, 372105, 372 21, 372 75, 372 93, 372 98, H01S 310
Patent
active
047019298
ABSTRACT:
A neodymium or other rare earth doped solid state laser is pumped by a matched high efficiency laser diode, resulting in a compact, high efficiency and long lifetime laser assembly. Output is in the near infrared range, but can be converted to the visible spectrum by an intra-cavity frequency doubler. A doubling crystal, which may be a KTP crystal, is placed at an optimum location in the laser cavity. Polarization of the beam may be achieved simply by stressing a non-birefringent rod, prior to frequency doubling, or by using a birefringent material such as Nd:YLF for the rod. An amplitude noise suppression elaton may also be placed at an optimum position in the laser cavity; alternatively a ring cavity or pair of quarter wave plates can be used. A folded cavity configuration produces a pair of beam waists in the cavity. Pulsed operation can be produced by means of a Q-switch.
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patent: 4553238 (1985-11-01), Shaw et al.
Farmer et al., "Solid State Pumping for Nd:YAG Laser with Integrated Focusing Optics", IBM Tech. Discl. Bull., vol. 15, No. 1, Jun. '72.
Culshaw et al.; "Eff. Freq. Doubl. Single Freq. Nd:YAG Laser", JQE, vol. QE-10, No. 2, (1974), p. 253.
Chesler et al.; "Miniature Diode-Pumped Nd:YAIG Lasers", Appl. Phs. Lett., vol. 23, No. 5, (1973), p. 235.
Baer Thomas M.
Keirstead Mark S.
Davis Paul
Jr. Leon Scott
Spectra-Physics Inc.
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