Manufacturing method of zinc germanium phosphide optical parametric oscillation element

A technology of optical parametric oscillation and germanium zinc phosphide, which is applied in electrical components, laser components, lasers, etc., can solve the problem of low laser output power and achieve high power, light weight, and small volume

Active Publication Date: 2012-12-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem of low output power of existing crystals for 3-5 μm mid-infrared band lasers, and provides a manufacturing method for germanium-zinc-phosphide optical parametric oscillation elements

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  • Manufacturing method of zinc germanium phosphide optical parametric oscillation element

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specific Embodiment approach 1

[0013] Specific implementation mode 1: The manufacturing method of the germanium phosphide zinc optical parametric oscillation element of the present implementation mode is carried out according to the following steps:

[0014] 1. Crystal orientation: first use the X-ray orientation instrument to measure the (100) crystal plane or (110) crystal plane of the ZGP crystal with the method of "ten" measurement, and the crystal orientation , and mark it on the crystal surface;

[0015] 2. Crystal cutting: According to the angle θ between the pumping wave vector of the I-type germanium phosphide zinc optical parametric oscillator and the optical axis of the crystal is 48°, 51.5°, 53.5°, 55° or 57.5°, the angle ψ is 0° Or 90° or according to the angle θ between the pumping wave vector of the II-type germanium phosphide zinc optical parametric oscillation element and the optical axis of the crystal is 90° or 63.5°, the cutting angle ψ is 45°, and the internal circle cutting machine is u...

specific Embodiment approach 2

[0023] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the size of the germanium zinc phosphide optical parametric oscillation element in step 2 is: the size of the light-transmitting surface is (4mm~30mm)×(4mm~30mm); the length is 15mm ~30mm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Specific embodiment three: what this embodiment is different from specific embodiment one or two is that the abrasive in step 3 is aluminum oxide (Al 2 o 3 ) or boron carbide (BC 4 ). Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a manufacturing method of a zinc germanium phosphide optical parametric oscillation element and relates to a manufacturing method of an optical parametric oscillation element, and the method can be used for solving the problem that the existing crystal has low output power of laser in a middle-infrared band ranging from 3mu m to 5 mu m. The method comprises the following steps of: determining the crystal face and crystal orientation of the crystal; then cutting the crystal into crystal blanks according to the inclined angles theta and psi of pumping wave vectors and the crystal optical axis; then roughly polishing and finely polishing; plating a connection layer on a light passing surface by a vacuum coating method, and then plating an antireflection coating by utilizing ZnSe, ZnS, ZnTe, LaF3, YF3 or HfF4 as a film material, so as to obtain the zinc germanium phosphide optical parametric oscillation element, wherein the reflectivity R of the antireflection coating in a wavelength of 1.9 mu m-2.2mu m is less than 1% and the reflectivity R of the antireflection coating in a wavelength of 3.5 mu m-4.8mu m is less than 0.3%. The damage threshold of the element is larger than 2.0J / cm<2>, the output of a middle-infrared laser with the power of more than 10 watts and the wavelength of 3-5 mu m can be achieved, and the element can be used for middle and far infrared laser devices.

Description

technical field [0001] The invention relates to a manufacturing method of a germanium phosphide zinc optical parameter oscillation element. Background technique [0002] Mid- and far-infrared lasers are used in directional infrared laser interference, infrared remote sensing, infrared ranging, laser imaging, infrared medical equipment, drug detection, infrared lithography, monitoring of harmful substances in the atmosphere, long-distance chemical sensing, deep space detection, etc. It has a wide range of applications, and its core component is the infrared nonlinear optical element. At present, the crystals that achieve 3-5 μm mid-infrared laser output through the optical parametric oscillation technology (OPO) include PPLN (periodically polarized LiNbO 3 ), AgGaS 2 , AgGaSe 2 , ZnGeP 2 etc., but AgGaS 2 The laser damage threshold is too low (15MW·cm -2 ), it is difficult to achieve high power output; AgGaSe 2 There is no suitable birefringence gradient to meet the pha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/108
Inventor 杨春晖雷作涛孙亮徐超朱崇强
Owner HARBIN INST OF TECH
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