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Proceedings Paper

Design of a high pressure/high thermal flux window lens of low polarization and phase distortion
Author(s): James L. Reeve; Andrew G. McKay
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Paper Abstract

Flat transmissive material windows are often used in high power cw laser systems to separate a low pressure resonator cavity from a one atmosphere beam train. Recently a requirement was identified for a pressure cell window that would transmit intensity peaks of 31 KW/cm2 for 5 seconds, react a differential pressure of 52 atm without active cooling, and focus the incident light as a lens. Budgeted optical distortion levels were 400 nm of rms wave front error and no more than 0.01% conversion of s polarization state into p state through window birefringence. The design of this window is described, including material selection, thermal and structural finite element analysis, Wiebull strength evaluation, measurement and selection of single crystal blanks with low internal stress, evaluation of phase and polarization distortion and mounting considerations.

Paper Details

Date Published: 25 February 1993
PDF: 9 pages
Proc. SPIE 1739, High Heat Flux Engineering, (25 February 1993); doi: 10.1117/12.140526
Show Author Affiliations
James L. Reeve, TRW, Inc. (United States)
Andrew G. McKay, TRW, Inc. (United States)

Published in SPIE Proceedings Vol. 1739:
High Heat Flux Engineering
Ali M. Khounsary, Editor(s)

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