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Proceedings Paper

Single-frequency 355 nm source for direct detection wind lidar
Author(s): Floyd E. Hovis; Charles Culpepper; Tom Schum; Greg Witt
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Paper Abstract

We have developed a laser based on an oscillator/amplifier design that uses diode-pumped, conductively cooled Nd:YAG slabs as the gain media. The oscillator is a telescopic ring resonator design that can be easily configured for a range of operational scenarios. An unstable version of the oscillator achieved 125 mJ/pulse with >10% electrical to optical efficiency and an M2 of 2.5. Operated in a stable TEM00 mode, the ring laser demonstrated >30 mJ/pulse at 100 Hz with an M2 of 1.3. We used the 30 mJ TEM00 output to extract the amplifiers and achieved 300 mJ/pulse of single frequency output at 50 Hz with an M2 of 1.5. We also investigated operation of an injection-seeded version of the ring resonator operated in the marginally stable regime without the use of graded reflectivity mirrors. With this approach we demonstrated single-frequency, 50 mJ/pulse operation at 50Hz with an M2 of 1.4 and a square, supergaussian profile. Initial third harmonic generation measurements have achieved over 40% conversion to 355 nm.

Paper Details

Date Published: 12 January 2005
PDF: 12 pages
Proc. SPIE 5653, Lidar Remote Sensing for Industry and Environmental Monitoring V, (12 January 2005); doi: 10.1117/12.578771
Show Author Affiliations
Floyd E. Hovis, Fibertek, Inc. (United States)
Charles Culpepper, Fibertek, Inc. (United States)
Tom Schum, Fibertek, Inc. (United States)
Greg Witt, Fibertek, Inc. (United States)

Published in SPIE Proceedings Vol. 5653:
Lidar Remote Sensing for Industry and Environmental Monitoring V
Upendra N. Singh; Kohei Mizutani, Editor(s)

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