Double-wave-length orthogonal polarization output light parameter oscillator

Abstract

KTP non-linear optic crystal is adopted in the invention. One piece of crystal uses non-critical phase match theta equal to 90 degree, phi equal to 90 degree; and the other piece of crystal uses critical phase match theta equal to 72 degree, phi equal to 0 degree. Two pieces of crystal generates tunable laser with orthogonal polarization directions, closed wavelengths and good quality of beam. Advantages are: low cost, and compact system. The optical parametric oscillator possesses wide market prospect.

Description

technical field [0001] The invention relates to the field of optoelectronic technology. Background technique [0002] As an important tunable laser light source, the optical parametric oscillator can generate coherent radiation from ultraviolet to far infrared. It has been applied in remote sensing of air pollution, leak detection of natural gas and oil pipelines, laser spectroscopy, photochemistry and isotope separation. Today, there is a certain demand for mid-infrared and even millimeter-wave lasers, but there is no technology to directly generate these long-wavelength lasers. It is reported that it is realized by laser difference frequency of two wavelengths. In 2004, T. Taniuchi et al. reported a dual-wavelength optical parametric oscillator [Joumal of Applied Physics Vol95, 15 June 2004]. The two KTP crystals used in it were both critical phase-matched, so the quality of the parametric light beam produced was poor, and The polarization directions of the two parametri...

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Problems solved by technology

In 2004, T. Taniuchi et al. reported a dual-wavelength optical parametric oscillator [Joumal of Applied Physics Vol95, 15 June 2004]. The two KTP crystals used in it were both critical phase-matched, so the quality of the parametric light beam produced was poor, and The polarization directions of the two parametric lights are the same

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