Picosecond optical parametric oscillator tunable around 1.55 μm

We describe the design and operation of a Ti:sapphire-pumped picosecond optical parametric oscillator based on the nonlinear crystal KTP. It has the combined advantages of a large tuning range centered at 1.55 μm, relatively high efficiency, transform-limited pulse output, and good spatial mode qual...

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Bibliographic Details
Published in:Optics communications 1996-06, Vol.127 (1), p.73-78
Main Authors: Qian, L, Benjamin, S.D, Smith, P.W.E
Format: Article
Language:English
Subjects:
Exact sciences and technology
Frequency conversion
harmonic generation, including high-order harmonic generation
Fundamental areas of phenomenology (including applications)
Nonlinear optical crystals
Nonlinear optics
Optical materials
Optics
Physics
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Summary:We describe the design and operation of a Ti:sapphire-pumped picosecond optical parametric oscillator based on the nonlinear crystal KTP. It has the combined advantages of a large tuning range centered at 1.55 μm, relatively high efficiency, transform-limited pulse output, and good spatial mode quality. It is critically phase-matched to give a continuous tuning range from 1.44 μm to 1.64 μm. Tuning is conveniently achieved by tuning the pump wavelength. Non-collinear pumping is used to compensate for spatial walk-off. The output pulse duration is 1.1 ps when pumped by a 1.8 ps pulse. The pump threshold power is 800 mW, and we have obtained over 200 mW of average signal power by pumping at 2.1 W, in good agreement with the predictions of our modeling calculations.
ISSN:0030-4018
1873-0310
DOI:10.1016/0030-4018(96)00003-X