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Mode Discrimination in Laser Cavity

IP.com Disclosure Number: IPCOM000097375D
Original Publication Date: 1962-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Goldsborough, JP: AUTHOR [+2]

Abstract

This reflector is for incorporation in laser cavities so as to provide mode selectivity and obtain single frequency operation. The reflector achieves modulation of output wave amplitude frequency and phase by varying either the length or refractive index or both of the medium in the compound reflector region.

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Mode Discrimination in Laser Cavity

This reflector is for incorporation in laser cavities so as to provide mode selectivity and obtain single frequency operation. The reflector achieves modulation of output wave amplitude frequency and phase by varying either the length or refractive index or both of the medium in the compound reflector region.

This compound reflector (II) has reflecting surfaces R(2) and R(3) separated a predetermined distance L(2). L(2) can be varied by moving R(3) and the favored wavelength reflectivity is thus varied. The refractive index of the medium filling the compound region II can also be varied by pressure changes or an electro-optive effect. Region I, which is bounded by reflecting surfaces R(1) and R(2) (R(1) > R(2)=R3 generally) and filled with a lasing medium capable of optical amplification, is otherwise conventional.

For even greater mode selectivity, a second compound reflector (two plate reflector cavity) can be substituted for reflector R1. The phase relationships of all three cavities are adjusted for the desired mode selectivity.

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