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Proceedings Paper

Modified off-axis unstable resonator for copper vapor laser
Author(s): Mordechai Lando; D. Belker; A. Lerrer; Haim Lotem; A. Dikman; Gabriel Bialolanker; S. Lavi; Shimon Gabay
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Paper Abstract

Pointing stability, beam divergence and beam generating mode have been studied in a copper vapor laser equipped with a modified off-axis unstable resonator. In the modified cavity design, the convex mirror is coupled via the edge of a flat scraper mirror, in contrast to the common resonator design where the edge of a convex mirror is used for feedback. As a result, the pointing stability improved, and day to day fluctuations were as small as 200(mu) rad. The beam divergence was about nine times the diffraction limit for the green laser line. The relatively high beam divergence, as well as spatial and temporal analysis of the beam generating mode, shows that a beam traversing the active medium only three times constitutes the useful laser radiation. Possible mechanisms causing the dominance of the triple-pass beam are discussed. An explanation for the impact of the beam generating process on the pointing stability and its improvement in the new cavity design is suggested.

Paper Details

Date Published: 1 May 1991
PDF: 8 pages
Proc. SPIE 1412, Gas and Metal Vapor Lasers and Applications, (1 May 1991); doi: 10.1117/12.43630
Show Author Affiliations
Mordechai Lando, Nuclear Research Ctr. Negev (Israel)
D. Belker, Nuclear Research Ctr. Negev (Israel)
A. Lerrer, Nuclear Research Ctr. Negev (Israel)
Haim Lotem, Nuclear Research Ctr. Negev (Israel)
A. Dikman, Nuclear Research Ctr. Negev (Israel)
Gabriel Bialolanker, Nuclear Research Ctr. Negev (Israel)
S. Lavi, Nuclear Research Ctr. Negev (Israel)
Shimon Gabay, Nuclear Research Ctr. Negev (Israel)


Published in SPIE Proceedings Vol. 1412:
Gas and Metal Vapor Lasers and Applications
Jin J. Kim; Frank K. Tittel, Editor(s)

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