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Optical Engineering

Laser beam collimation using a phase conjugate Twyman-Green interferometer
Author(s): Ram Prakash Shukla; Mostafa Dokhanian; M. C. George; Putcha Venkateswarlu
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Paper Abstract

This paper presents an improved technique for testing laser beam collimation using a phase conjugate Twyman-Green interferometer. The technique is useful for measuring laser beam divergence. It is possible using this technique to detect the defocusing of the order of one micrometer for a well corrected collimating lens. A relation is derived for the defocusing that can be detected by the phase conjugate interferometer.

Paper Details

Date Published: 1 April 1991
PDF: 5 pages
Opt. Eng. 30(4) doi: 10.1117/12.55817
Published in: Optical Engineering Volume 30, Issue 4
Show Author Affiliations
Ram Prakash Shukla, Alabama A&M Univ. (United States)
Mostafa Dokhanian, Alabama A&M Univ. (United States)
M. C. George, Alabama A&M Univ. (United States)
Putcha Venkateswarlu, Alabama A&M Univ. (United States)

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