Directional Cutting Method for Infrared Nonlinear Optical Components Prepared by Chalcopyrite-like Negative Uniaxial Crystals

Abstract

A directional cutting method for preparing infrared nonlinear optical elements from chalcopyrite negative uniaxial crystals, the steps include: (1) according to the cleavage planes {112} and {101} of chalcopyrite negative uniaxial crystals, using The C-axis direction of the crystal is determined by the crystal standard pole figure of Wu's grid scale and the θ-2θ continuous scanning of the X-ray diffractometer; (2) The crystal with the determined C-axis direction is placed on the cutting machine, and according to the phase matching required by the optical element Rotate the sample stage Δθ toward the far C-axis at an angle θm and then cut to obtain the initial sample of the optical element, Δθ=θm-θ(112); (3) Place the initial sample of the optical element on the sample stage of the X-ray diffractometer, and measure the optical The swing-back spectrum of the cut surface of the original sample of the component, the diffraction peak value θ' and Δθ' are obtained, Δθ'=|θ'-θ'(112)|; (4) The finishing of the optical component, the cut surface Correction is performed until Δθ'=Δθ.

Description

technical field [0001] The invention belongs to the field of preparation and processing of crystal nonlinear optical components, in particular to a directional cutting processing method for preparing infrared nonlinear optical components with chalcopyrite negative uniaxial crystals without direction characteristics. Background technique [0002] Chalcopyrite crystals used as infrared nonlinear optical components mainly include I-III-VI compounds and II-IV-V compounds. The chalcopyrite single crystals include positive uniaxial crystals and negative single crystals. Axial crystals are generally prepared by the Bridgman-Stockbarger method (B-S method). Due to the strong constraints of the growth container, coupled with the influence of growth rate, melt viscosity, etc., the grown ingot is usually cylindrical, with no obvious directional characteristics in appearance. To accurately process it into various phase matching angles (θm) and azimuth angles Non-linear optical compon...

AI Technical Summary

Problems solved by technology

The disadvantages of these methods are that the equipment is relatively complicated, the precision is not high, and the experience and technical proficiency of the operators are relatively high, and it is easy to pollute the environment during the orientation process and affect the health of the operators.

Images