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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 1 — Jan. 1, 2008
  • pp: 64–71

Narrow-linewidth megahertz-repetition-rate optical parametric oscillator for high-speed flow and combustion diagnostics

Naibo Jiang, Walter R. Lempert, Gary L. Switzer, Terrence R. Meyer, and James R. Gord  »View Author Affiliations

Applied Optics, Vol. 47, Issue 1, pp. 64-71 (2008)

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We demonstrate the ability to generate ultra-high-frequency sequences of broadly wavelength-tunable, high-intensity laser pulses using a custom-built optical parametric oscillator pumped by the third-harmonic output of a “burst-mode” Nd:YAG laser. Burst sequences consisting of 6–10 pulses separated in time by 6 10   μs are obtained, with average total conversion efficiency from the 355   nm pump to the near-IR signal and idler wavelengths of 33% . Typical individual pulse output energy for the signal and idler beams is in the range of 4 6   mJ , limited by the available pump energy. Line narrowing is demonstrated by means of injection seeding the idler wave using a low-power external-cavity diode laser at 827   nm . It is shown that seeding reduces the time-averaged linewidth of both the signal and idler outputs to 300   MHz , which is near the 220   MHz Fourier transform limit. Line narrowing is achieved without recourse to active cavity stabilization.

© 2008 Optical Society of America

OCIS Codes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(280.1740) Remote sensing and sensors : Combustion diagnostics
(280.2490) Remote sensing and sensors : Flow diagnostics

ToC Category:
Remote Sensing and Sensors

Original Manuscript: September 12, 2007
Manuscript Accepted: October 27, 2007
Published: December 20, 2007

Naibo Jiang, Walter R. Lempert, Gary L. Switzer, Terrence R. Meyer, and James R. Gord, "Narrow-linewidth megahertz-repetition-rate optical parametric oscillator for high-speed flow and combustion diagnostics," Appl. Opt. 47, 64-71 (2008)

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