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

A technology of optical parametric oscillators and cavity mirrors, which is applied to the structure/shape of lasers, laser components, and optical resonators, and can solve the problems of restricting the assembly and use of mid- and far-infrared lasers, the cost of being easily affected by vibration, and the difficulty of miniaturization of devices, etc. problems, to achieve the effect of easy adjustment, improve the stability of use, and reduce the number

Active Publication Date: 2018-10-26
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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,

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 Manufacturing method of optical parametric oscillator without cavity mirror

[0054] In this example, a cavity-less mirror optical parametric oscillator using magnesium-doped lithium niobate (PPMgLN) as the crystal material is proposed, including the following steps:

[0055] Firstly, the crystal material: magnesium-doped lithium niobate crystal is subjected to periodic polarization treatment. The crystal material used was 60 mm long, 8 mm wide, and 1 mm thick. The polarization period is 29.5um, and the length of the crystal polarization region is 50mm, which is located in the center of the entire device. Protect the polarized area of ​​the crystal, and in a high-temperature gas atmosphere, carry out metal diffusion on both sides of the above-mentioned crystal material, and introduce the photothermorefractive material into both sides of the crystal material, thereby forming a diffusion area on both sides of the crystal device 103. On one side of the crys...

Embodiment 2

[0061] Embodiment 2 Optical parametric oscillator without cavity mirror

[0062] see figure 1 , and the difference from Embodiment 1 is that the thickness of the cavity mirror-less oscillating device is 0.2mm. The crystal material is lithium niobate material crystal. The structure of the crystal polarization region 104 is a chirped structure near 200um. The length of the diffusion region 103 along the direction of the optical path is 4mm.

Embodiment 3

[0063] Embodiment 3 Manufacturing method of cavity-less mirror optical parametric oscillator

[0064] The difference from Embodiment 1 is that the thickness of the cavity-less mirror oscillating device is 5 mm. The period of the crystal polarization region 104 is 4.0 um. The crystal material is potassium titanyl phosphate crystal. The length of the diffusion region 103 along the direction of the optical path is 10 mm.

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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...

Claims

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Application Information

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IPC IPC(8): H01S3/08H01S3/06
CPCH01S3/0602H01S3/08
Inventor 陈怀熹许艺斌李广伟缪龙冯新凯邹小林梁万国
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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