Chameleon OPO

Coherent Inc.

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SANTA CLARA, Calif., Aug. 18, 2011 — The latest Chameleon optical parametric oscillator (OPO) from Coherent Inc., the Chameleon Compact OPO-Vis, includes an optional fully integrated second-harmonic-generation (SHG) accessory that provides automated frequency doubling of the OPO and the Chameleon laser output. When used in conjunction with the Chameleon ultratunable one-box laser, it provides an automated tuning range of 340 to 1600 nm, with simple touch-screen controls and no manual intervention. It provides hundreds of milliwatts of output power over most of its tuning range, which can be expanded to cover the mid-IR region between 1750 and 4000 nm.

Chameleon one-box Ti:sapphire lasers have a fundamental tuning range of 680 to 1080 nm, which can be further extended toward shorter wavelengths with the addition of frequency doubling and tripling options as well as toward longer wavelengths with an OPO. The latest SHG option in the Chameleon OPO integrates the frequency-doubling options of both the laser and the OPO into a single unit. This gives the user flexibility to double the laser and/or the OPO outputs, covering also the traditional Ti:sapphire tuning gap of 500 to 700 nm.

Use of the fan-poled OPO crystal technology enables the laser and the OPO outputs, or their SHG outputs, to be independently tunable. This provides two full degrees of freedom in dual-color experiments.

Applications include multiphoton imaging, time-resolved spectroscopy, terahertz studies and materials science. Broad and independent tuning of the laser and OPO outputs enables coherent anti-Stokes Raman scattering spectroscopy and imaging with a single laser system as well as flexible pump-probe studies in photochemistry and biology.

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Published: August 2011