Temporal fringe pattern analysis system of a laser gain media

Details Temporal fringe pattern analysis system of a laser gain media Temporal fringe pattern analysis system of a laser gain media

1994-12-22

1996-04-02

Turner, Samuel A.

Optics: measuring and testing

By particle light scattering

With photocell detection

356346, 356 355, G01B 902

Patent

active

055045782

ABSTRACT:
An interferometric based diagnostic for experimentally determining the time-dependent OPD change in an optically heated media works by heating a glass window with a CO.sub.2 laser, effectively simulating high power end-pumping in a rod. Temporal OPD changes are measured by automated counting of interference fringes as they are generated by the thermal effects, and a two-dimensional, time-dependent model is developed to describe the radial temperature distribution in a cylinder, the stress and strain distributions, the thermal expansion, and the associated OPD change caused by a Gaussian heat source.

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