Detailed single-shot spectral diagnostics of Q-switched solid state lasers

Christian Veltkamp; A. B. Petersen; J. D. Kafka

doi:10.1117/12.713791

9 March 2007 Detailed single-shot spectral diagnostics of Q-switched solid state lasers

Christian Veltkamp, A. B. Petersen, J. D. Kafka

Proceedings Volume 6451, Solid State Lasers XVI: Technology and Devices; 64511E (2007) https://doi.org/10.1117/12.713791
Event: Lasers and Applications in Science and Engineering, 2007, San Jose, California, United States

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.

Citation Download Citation

Christian Veltkamp, A. B. Petersen, and J. D. Kafka "Detailed single-shot spectral diagnostics of Q-switched solid state lasers", Proc. SPIE 6451, Solid State Lasers XVI: Technology and Devices, 64511E (9 March 2007); https://doi.org/10.1117/12.713791

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KEYWORDS

Pulsed laser operation

Mirrors

Q switched lasers

Interferometers

Solid state lasers

Collimation

Sensors

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