Single-frequency 355 nm source for direct detection wind lidar

Floyd E. Hovis; Charles Culpepper; Tom Schum; Greg Witt

doi:10.1117/12.578771

12 January 2005 Single-frequency 355 nm source for direct-detection wind lidar

Floyd E. Hovis, Charles Culpepper, Tom Schum, Greg Witt

Proceedings Volume 5653, Lidar Remote Sensing for Industry and Environmental Monitoring V; (2005) https://doi.org/10.1117/12.578771
Event: Fourth International Asia-Pacific Environmental Remote Sensing Symposium 2004: Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2004, Honolulu, Hawai'i, United States

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.

Citation Download Citation

Floyd E. Hovis, Charles Culpepper, Tom Schum, and Greg Witt "Single-frequency 355 nm source for direct-detection wind lidar", Proc. SPIE 5653, Lidar Remote Sensing for Industry and Environmental Monitoring V, (12 January 2005); https://doi.org/10.1117/12.578771

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