Abstract

An oscillation threshold of 780mW has been demonstrated in a singly-resonant, continuous-wave optical parametric oscillator (CW SRO) using a fiber-amplified, distributed feedback (DFB) fiber laser as pump source. A linewidth of 1MHz was measured, and the idler frequency was fine-tuned by up to 130GHz by tuning the pump laser. To our knowledge, this is the first example of a single frequency CW SRO pumped by an all-fiber pump source, a reduction in threshold by a factor of three over previous 1μm-pumped CW SROs, and a reduction by two orders of magnitude in the linewidth of CW SROs pumped by fiber pump sources.

© 2006 Optical Society of America

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References

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CLEO 2004 Postdeadline Paper

A. Henderson and R. Stafford, "CW optical parametric oscillator pumped by a distributed feedback fiber laser," postdeadline paper CPDA7 in Conference on Lasers and Electro-Optics 2004.

J. Appl. Phys.

G. D. Boyd and D. A. Kleinman, "Parametric interactions of focused Gaussian light beams," J. Appl. Phys. 39, 3597-3639 (1968).
[CrossRef]

J. Opt. Soc. Am. B

Opt. Express

Opt. Lett.

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Figures (6)

Fig. 1.
Fig. 1.

Schematic of OPO configuration.

Fig. 2.
Fig. 2.

OPO idler output power and pump depletion, measured at an idler wavelength of 2.7μm.

Fig. 3.
Fig. 3.

Fine tuning of the OPO idler frequency measured as a function of pump tuning parameter, performed by PZT voltage and fiber temperature variation.

Fig. 4.
Fig. 4.

OPO idler linewidth measured at a wavelength of 3.17μm.

Fig. 5.
Fig. 5.

Absorbance spectrum of carbon dioxide measured at 2.81μm in 60cm cell containing 5% CO2 in air at 25 Torr pressure. Solid (blue) line shows theoretical fit, using HITRAN data.

Fig. 6.
Fig. 6.

Absorbance spectrum of methane measured at 3.17μm in 60cm cell containing 6% CH4 in air at 30 Torr pressure. Solid (blue) line shows theoretical fit, using HITRAN data.

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