A Tunable Dual-Wavelength Ultrafast Optical Parametric Oscillator

An optical parametric oscillator and dual-wavelength technology, which is applied in the laser field, can solve the problems of undistorted dual-wavelength femtosecond pulse laser and the inability to effectively generate pulse waveforms, so as to avoid pulse distortion, eliminate group velocity mismatch, and improve matching The effect of bandwidth

CN106785848BActive Publication Date: 2019-08-16SHENZHEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-08-16

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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.
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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 ...

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Embodiment Construction

[0023] In order to make the purpose, features, and advantages of the embodiments of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, The described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0024] Such as figure 1 , figure 2 As shown in the figure, when the laser wavelength of the pump source is 1064nm and 790nm respectively, the e-polarized signal light and the corresponding o-polarized idler light in the periodically polarized crystal meet the group velocity matching requirements The variation curve of temperature with wa...