Coherent light generators – Particular active media – Active media with particular shape
Patent
1989-04-21
1990-04-17
Sikes, William L.
Coherent light generators
Particular active media
Active media with particular shape
372 39, 372 70, 372 72, H01S 306
Patent
active
049187031
ABSTRACT:
A substantially rectangular slab of laser material has a pair of opposing concave edge faces to reduce parasitic oscillations. The concavities can be curved in either the transverse or longitudinal directions or both, i.e., they are toroidal sections. The slab can be Nd:YAG. Brewster ends and chamfered corners can be provided for the slab as well as tapered portions for the concavities. In a laser, the concave portions have a length slightly greater than that of the pump lamps. A pair of siderails are over the concave portions to reduce optical distortion.
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D. C. Brown et al., "Parasitic Oscillations and Amplified Spontaneous Emission in Face--Pumped Total Internal Reflection Lasers," SPIE, vol. 736, pp. 74-83, 1987.
D. C. Brown et al., "Parasitic Oscillations, Absorption, Stored Energy Density and Heat Density in Active--Mirror and Disk Amplifiers", Applied Optics, Jan. 15, 1978, vol. 17, No. 2, pp. 211-224.
Davis Jr. James C.
Epps Georgia Y.
General Electric Company
Krauss Geoffrey H.
Sikes William L.
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