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Proceedings Paper

Detailed single-shot spectral diagnostics of Q-switched solid state lasers
Author(s): Christian Veltkamp; A. B. Petersen; J. D. Kafka
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Paper Abstract

A measurement station to examine the longitudinal mode structure of Q-switched solid state lasers on a single pulse basis is presented. The key component is a Fabry-Perot interferometer (FPI) providing a high finesse to not only display the full spectral emission bandwidth but also resolve single modes of high gain laser media such as Nd : YVO4. In addition the setup allows one to link relative pulse energy data to each recorded fringe pattern. It is then used to quantify the spectral information of three lasers with a cavity length of up to 200mm to evaluate correlations among pulse stability, pulse repetition frequency and spectral emission characteristics. The optical approach implies a decaying finesse from approximately 250 to 60 across the measurement range. Therefore the setup can only partially resolve single longitudinal modes of lasers with a cavity length greater than 130mm but still gives a qualitative picture of the emission bandwidth that allows a deeper understanding of the spectral characteristics and thus points the direction for performance improvement.

Paper Details

Date Published: 9 March 2007
PDF: 8 pages
Proc. SPIE 6451, Solid State Lasers XVI: Technology and Devices, 64511E (9 March 2007); doi: 10.1117/12.713791
Show Author Affiliations
Christian Veltkamp, Spectra-Physics (United States)
A. B. Petersen, Spectra-Physics (United States)
J. D. Kafka, Spectra-Physics (United States)

Published in SPIE Proceedings Vol. 6451:
Solid State Lasers XVI: Technology and Devices
Hanna J. Hoffman; Ramesh K. Shori; Norman Hodgson, Editor(s)

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