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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 21, Iss. 9 — Sep. 1, 2004
  • pp: 1586–1594

Control of frequency chirp in nanosecond-pulsed laser spectroscopy. 2. A long-pulse optical parametric oscillator for narrow optical bandwidth

Richard T. White, Yabai He, Brian J. Orr, Mitsuhiko Kono, and K. G. H. Baldwin  »View Author Affiliations


JOSA B, Vol. 21, Issue 9, pp. 1586-1594 (2004)
http://dx.doi.org/10.1364/JOSAB.21.001586


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Abstract

An injection-seeded optical parametric oscillator (OPO) based on periodically poled KTiOPO4 is pumped at 532 nm by relatively long (~27-ns) pulses from a specially constructed Nd:YAG laser. This pulsed OPO system generates continuously tunable, single-longitudinal-mode output at signal wavelengths near 842 nm, which is suitable for high-resolution spectroscopy. Optical-heterodyne measurements show that chirp in the instantaneous frequency of the pulsed OPO signal output radiation increases linearly as the seed frequency is detuned from the free-running (unseeded) OPO frequency. The frequency chirp can be maintained below 10 MHz, which is substantially less than the Fourier-transform-limited optical bandwidth (17.5 MHz full width at half-maximum for a 25-ns OPO signal pulse) and is insensitive to variation of the fluence of the pump radiation. The effects of detuning the OPO cavity length from resonance with the seed frequency and the onset of partially seeded OPO operation are also investigated.

© 2004 Optical Society of America

OCIS Codes
(040.2840) Detectors : Heterodyne
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(300.6320) Spectroscopy : Spectroscopy, high-resolution

Citation
Richard T. White, Yabai He, Brian J. Orr, Mitsuhiko Kono, and K. G. H. Baldwin, "Control of frequency chirp in nanosecond-pulsed laser spectroscopy. 2. A long-pulse optical parametric oscillator for narrow optical bandwidth," J. Opt. Soc. Am. B 21, 1586-1594 (2004)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-21-9-1586

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