A Tunable Dual-Wavelength Ultrafast Optical Parametric Oscillator

Abstract

The invention is applicable to the technical field of a laser, and provides a tunable dual-wavelength ultrafast optical parameter oscillator. The tunable dual-wavelength ultrafast optical parameter oscillator comprises a pulse laser pumping source, an input coupling mirror, a periodic polarization crystal with a fan-shaped structure, a dispersion compensation device, an output coupling mirror, a beam splitter and a crystal temperature control device which are sequentially arranged. Compared with the prior art, the tunable dual-wavelength ultrafast optical parameter oscillator has the advantages that by a dispersion relation between group velocity and crystal temperature of pulse laser and by controlling a working temperature of the periodic polarization crystal, group velocity mismatching between signal light and idler frequency light in the periodic polarization crystal is eliminated; and the signal light and the idler frequency light are synchronously amplified, the matching bandwidth of the optical parameter oscillator can be improved, pulse distortion caused by temporal walk-off is prevented, and the optical parameter oscillator can simultaneously output two paths of high-quality ultrashort pulse laser.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a tunable dual-wavelength ultrafast optical parametric oscillator. Background technique [0002] The energy level structure and fluorescence emission lines of the laser medium play a decisive role in which wavelength of laser light can be produced. Different laser media can produce laser light of different wavelengths, but in most cases, a laser using a single laser medium can only output laser light of a specific wavelength. However, from basic research in physics and chemistry to medicine and even industrial applications, more and more research or application fields require the simultaneous use of two laser beams with different wavelengths. For example, the pump-probe technology, which is widely used in the study of ultrafast dynamics, needs to use an ultrafast laser to excite the sample, and then use another ultrafast laser with a different wavelength to detect the stimulated ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a tunable dual-wavelength ultrafast optical parametric oscillator, which aims to solve the problem that the dual-wavelength optical parametric oscillator in the prior art cannot effectively generate a dual-wavelength femtosecond pulsed laser without distortion in the pulse waveform

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