Method of altering reflectivity of optical elements

Details Method of altering reflectivity of optical elements Method of altering reflectivity of optical elements

1988-09-20

1990-01-16

Arnold, Bruce Y.

350 9615, G02B 2700

Patent

active

048939005

ABSTRACT:
A method for restricting the mode of operation of long wavelength waveguide laser (FIG. 1) by introducing an approximate step function into the reflectivity of circular optical elements (19) used in such lasers. The preferred method is to grind off a portion of the optical coating (20) of the optical element (19) leaving a circular unground region (26) of high reflectivity having a diameter (D) of approximately 60% of the laser bore width (b) bounded by a ground region (28) of lower reflectivity. The method permits simple, inexpensive field modification of existing lasers.

REFERENCES:
patent: 4669817 (1987-06-01), Mori
Matizen, Yu E. and Troitskii, Yu V., "Formation of Non-Gaussian Light Beams in a Laser With an Exit Mirror Characterized by a Smooth Amplitude Inhomogeneity"; Sov. J. Quantum Electron, 16, Jul. 1986; pp. 941-944.

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