Development of a Tunable Megahertz Pulse-burst Alexandrite Laser System

Luff, John; Aschoff, Howard; Schober, Tim; Mansfield, D. K.; Zaidi, Sohail; Miles, Richard B.

doi:10.2514/6.2003-3746

Cited by 1 publication

(1 citation statement)

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“…While burst-mode output was obtained, the individual pulse energies were too low to be measured. Luff et al [7] have reported an alexandrite system, which utilizes the combination of a long-pulse ͑ϳ170 ns͒ Q-switched oscillator, a Harriott cell regenerative amplifier (for pulse slicing and amplification), and two single-pass amplifiers. Approximately 150 J per pulse for a 30 pulse sequence with 1 s separation at 761 nm was reported.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2007

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We demonstrate the ability to generate ultra-high-frequency sequences of broadly wavelength-tunable, highintensity laser pulses using a custom-built optical parametric oscillator pumped by the thirdharmonic output of a "burst-mode" Nd:YAG laser. Burst sequences consisting of 6-10 pulses separated in time by 6-10 Îs 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. RightsThis paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: https://www.osapublishing.org/ ao/abstract.cfm?uri=ao-47-1-64. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. 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 thirdharmonic output of a "burst-mode" Nd:YAG laser. Burst sequences consisting of 6 -10 pulses separated in time by 6-10 s are obtained, with average total conversion efficiency from the 355 nm pump to the near-IR signal and idler wavelengths of ϳ33%. 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 ϳ300 MHz, which is near the 220 MHz Fourier transform limit. Line narrowing is achieved without recourse to active cavity stabilization.

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Section: Introductionmentioning

confidence: 99%