Optically parametric oscillator

Abstract

The invention relates to an optical parametric oscillator, which comprises a nonlinear optical material (1) with the double-zero dispersion wavelength, a high reflector (2), an output mirror (3), a parametric oscillation optical beam collimator (4), a parametric optical line width compressor (5), a pumped optical coupler (6), a lambda / 2 phase retarder (7), a laser power controller (8) and an optical isolator (9). The nonlinear optical material (1) has a double-zero dispersion wavelength and is arranged in a resonant cavity formed by the high reflector and the output mirror. The pumped optical wavelength is in the anomalous dispersion regime of the photonic crystal fiber, thereby ensuring the phase matching conditions and generating the highly efficient four-wave mixing effect. For the parametric oscillation formed by simplifying the four-wave mixing, the wavelengths of the two parametric lights are respectively arranged at the double-zero dispersion wavelength of the photonic crystal optical fiber, thereby realizing the group velocity dispersion compensation of the parametric light, solving the problem of the ultra-short pulse dispersion compensation, and greatly reducing the pumping threshold.

Description

technical field [0001] The invention belongs to the field of optoelectronics and laser technology, and relates to the fields of optical waveguide theory and technology, nonlinear optics, photonics and technology. It is suitable for applications in the fields of military laser, space laser communication, laser medicine, laser nuclear fusion, laser processing, laser spectroscopy and precision optical measurement. Background technique [0002] The optical parametric oscillator is still an effective technology for realizing laser frequency conversion at present. The general optical parametric oscillator uses nonlinear optical crystals, but due to the limitations of phase matching, effective nonlinear coefficient and optical transmission band, it lacks effective nonlinear In optical crystals, optical parametric oscillators cannot be realized in many wavelength ranges. In particular, the lack of high-quality mid-to-far infrared laser crystals and nonlinear crystals severely restr...

AI Technical Summary

Problems solved by technology

This type of dispersion compensation technology is relatively simple, but it cannot form the oscillation of the parametric light with a frequency higher than that of the pump light, and can only output the parametric light in this band as idler light, which greatly limits the output power of the parametric light in this band

[0005] In summary, current photonic crystal fiber optic parametric oscillators suffer from serious problems with group velocity dispersion compensation

In addition, the current photonic crystal fiber parametric oscillator has problems such as large optical loss and low output power of parametric light.

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