Cavity mirror-free optical parametric oscillator, manufacturing method thereof, and medium-far infrared laser

Abstract

The invention discloses a Cavity mirror-free optical parametric oscillator, a manufacturing method thereof, and a medium-far infrared laser. The oscillator comprises a crystal polarization region anddistributed feedback curved face optical grating regions. The distributed feedback curved face optical grating regions are symmetrically arranged on the outer side of the crystal polarization region by taking the crystal polarization region as the center and are connected with optical paths of the crystal polarization region. By writing the distributed feedback curved face optical gratings (c-DBR)on two ends of the crystal polarization region to replace a traditional cavity mirror in an optical parametric oscillation system, the size of the obtained optical parametric oscillator is effectively reduced. Elements of the middle-far infrared laser in the optical parametric oscillator are reduced. Difficulty level in adjustment is reduced and use stability is improved. The invention also provides a making method of the cavity mirror-free optical parametric oscillator and a middle-far infrared laser including the cavity mirror-free optical parametric oscillator. A pump light laser is used for directly pumping the device, so a portable small-size middle-far infrared laser can be obtained.

Description

technical field [0001] The invention relates to a cavity-less mirror optical parametric oscillator, a manufacturing method thereof, and a mid-to-far infrared laser, belonging to the field of laser components. Background technique [0002] The mid-to-far infrared band of 2-10 μm has strong penetrating ability in the atmosphere, and there are many atomic or molecular absorption peaks at the same time. Therefore, the performance analysis and detection of laser light sources in this band in materials, biology, chemistry, etc. It plays an important role in military anti-missile and positioning. [0003] At present, an important method for generating mid- and far-infrared lasers is the optical parametric oscillator (OPO) method of nonlinear optical crystals. The method can provide various wavelength tuning methods, multiple power values ​​and multiple modulation methods. The OPO with the traditional structure usually needs to place nonlinear crystals in two cavity mirrors with s...

AI Technical Summary

Problems solved by technology

The optical parametric oscillation of this structure has been able to obtain higher light-to-light efficiency, but at the same time, the structure also has problems such as difficulty in alignment, easy vibration after alignment, and high cost. components, it is difficult to miniaturize the whole device, which is not conducive to portability

This also greatly limits the assembly and use of mid- and far-infrared lasers in fields such as biomedicine, environmental protection testing, and military confrontation.

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