Abstract
Optical diagnostics of highly dynamic supersonic and hypersonic flows requires laser sources with a combination of high pulse intensities and fast repetition rates. A burst-mode Nd:YAG laser system is presented for increasing the overall energy of 532 nm pulse trains by ${\sim}{100\!\times}$ and the number of high-energy pulses by ${30\!\times}$ for extended duration megahertz-rate flow diagnostics. At a lower repetition rate of 100 kHz, unprecedented energies near 1 J/pulse are achieved at 532 nm over a 1.1 ms burst. The laser performance is characterized and demonstrated for megahertz-rate laser-induced breakdown spectroscopy in a Mach 2 turbulent jet.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Pingfan P. Wu and Richard B. Miles
Opt. Lett. 25(22) 1639-1641 (2000)
Brian Thurow, Naibo Jiang, Mo Samimy, and Walter Lempert
Appl. Opt. 43(26) 5064-5073 (2004)
Sukesh Roy, Joseph D. Miller, Mikhail N. Slipchenko, Paul S. Hsu, Jason G. Mance, Terrence R. Meyer, and James R. Gord
Opt. Lett. 39(22) 6462-6465 (2014)