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Tunable Solid State Laser

IP.com Disclosure Number: IPCOM000095441D
Original Publication Date: 1964-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Hardy, WA: AUTHOR [+2]

Abstract

A solid state laser utilizing an adjustable reflector is tunable with negligible attenuation.

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Tunable Solid State Laser

A solid state laser utilizing an adjustable reflector is tunable with negligible attenuation.

The laser of a Fabry-Perot type includes crystal 10 having a longitudinal axis X-X' made of any known lasing material of index of refraction n. The cross- sectional area of crystal 10 can be of any desired geometry, such as, circular, square or rectangular. One end of crystal 10 is a highly polished plane surface S disposed perpendicular to the axis X-X'. A first reflector M(1) having a highly reflecting plane surface is applied to the plane surface S of crystal 10.

The other end of crystal 10 is a highly polished plane surface I inclined at an angle r to the plane perpendicular to the axis X-X' of the crystal 10. That is, the normal N-N' to the plane surface I is inclined by an angle r to the axis X-X'. The magnitude of the angle r is determined by cot r=n, which is Brewster's angle. A second reflector M(2) having a highly reflecting plane surface is inclined so that the normal P-P' to the reflecting plane surface of M(2) forms an angle i with respect to the normal N-N'. That is, the reflecting plane surface of M(2) is inclined by an angle i to the plane surface I of crystal 10. The magnitude of the angle i is determined by the tan i=n. Reflector M(2) is adjusted to the desired position by any suitable mechanism as indicated by A. A variation in the position of M(2) tunes the laser through a portion of the fluorescence line width of the materia...