Laser alignment system

Details Laser alignment system Laser alignment system

1990-02-23

1991-05-28

Gonzalez, Frank

Coherent light generators

Particular resonant cavity

Mirror support or alignment structure

356363, H01S 3086

Patent

active

050200747

ABSTRACT:
A method and apparatus for precisely aligning waveguide lasers. Each optical element of a waveguide laser is systematically and independently adjusted relative to pertinent waveguide segments. A test laser beam is propagated into a waveguide segment which is adjacent to a selected end port substantially parallel to the longitudinal axis running through the center of the waveguide segment so that the test laser beam contacts opposing wall portions along two axes of the selected end port. The test laser beam is reflected through each successive waveguide segment, the diffraction patterns of the reflected test laser beam are detected at the end opposite the reflecting means, and the reflecting elements are adjusted until the diffraction patterns of the reflected test laser beam are substantially symmetrical. After the test laser beam has propagated through all waveguide segments, it is reflected off the endmost reflecting element and back through the waveguide laser so that the beam exits through the selected end port. The diffraction patterns of the reflected test laser beam are then detected, and the position of the endmost reflecting element is adjusted until the diffraction patterns of the test laser beam are substantially symmetrical. As a final step, the reflecting element mounted adjacent to the selected end port is adjusted.

REFERENCES:
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patent: 3614235 (1971-10-01), Murnerlyn
patent: 3977788 (1976-08-01), Moore
patent: 3999858 (1976-12-01), Hernquist et al.
patent: 4387462 (1983-06-01), Markus
patent: 4438514 (1984-03-01), Chenausky et al.
patent: 4676649 (1987-06-01), Phillips
patent: 4815094 (1989-03-01), Cantoni
patent: 4891819 (1990-01-01), Sutter, Jr. et al.
Hernquist and Firester, "Prealignment of Gas Laser Cavities", Review of Scientific Instruments, vol. 46, No. 8, 8-75, pp. 1040-1042.

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