Laser apparatus and method for discriminating against higher ord

Details Laser apparatus and method for discriminating against higher ord Laser apparatus and method for discriminating against higher ord

1986-12-05

1988-10-18

Davie, James W.

Coherent light generators

Particular beam control device

Mode discrimination

372 21, 372 93, 372101, H01S 3098

Patent

active

047792787

ABSTRACT:
Disclosed is a laser apparatus and a related method for use with a laser medium of a type which emits a beam of coherent laser energy having both low and high order modes. End reflectors are provided for reflecting at least a portion of the energy in the beam back through the laser medium, and positive and negative lens elements are positioned on opposing sides of the lasing medium so that discrimination against the higher order modes is achieved by non-linearly amplifying the reflected beam portion passing through the lasing medium.

REFERENCES:
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patent: 4088964 (1978-05-01), Clow
patent: 4494235 (1985-01-01), Guch, Jr. et al.
Kortz et al; "Stability and-Internal Variable Lenses"; Applied Optics/vol. 20, No. 23/1 Dec. 1981; pp. 4124-4134.
J. K. Lasers Promotional Brochure, J. K. Lasers, A Lumonics Group Company (Copy in file).
Line Lite Laser Promotional Brochure, Line Lite Laser Corp., 430 Ferguson Drive & Bldg. 4, Mountain View CA.
Optics Communications, vol. 37, No. 5 (Jun., 1981) pp. 359-362-Hanna et al, Article, entitled "Large vol. Tem.sub.00 Mode Operation of Nd:Yag Lasers".
SPIE ECOOSA Publication (Amsterdam, 1984), Gobbi et al, Article-p. 71, "Stable Telescopic Resonators, Instable Resonators and New-Engineering".

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