Peripheral gain suppression in a laser medium

Details Peripheral gain suppression in a laser medium Peripheral gain suppression in a laser medium

1982-07-06

1985-04-23

Sikes, William L.

Coherent light generators

Particular beam control device

Scanning

372 99, 372108, 372 26, 372 66, 372 20, H01S 310

Patent

active

045134219

ABSTRACT:
A method and apparatus for generating a plurality of secondary directional modes within the resonant cavity of a scanning laser oscillator. A first directional mode is generated by directing an electron beam on a variable reflectance end reflector to create a variable position pixel. A pattern of fixed reflectance material is positioned on the surface of the variable reflectance end reflector to generate the secondary directional modes within the resonant cavity. The oscillation threshold for the secondary directional modes is higher than the first directional mode, thereby allowing the first directional mode to have priority over the second directional modes. The second directional modes occupy the regions of the active laser medium of the resonant cavity not occupied by the first directional mode thereby suppressing the gain of the laser medium therein.

REFERENCES:
patent: 3445826 (1969-05-01), Myers
patent: 3473864 (1969-10-01), Garbuny
patent: 3530401 (1970-09-01), Garbuny et al.
patent: 3555454 (1971-01-01), Myers et al.
patent: 4283113 (1981-08-01), Eden

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