A high and low temperature light modulator

Abstract

A high and low temperature optical modulator, comprising: a metal shell, the thermally conductive insulating elastic material layer is arranged between the gold-plated surface of the positive electrode and the metal shell, and the thermally conductive insulating elastic material layer is used to maintain the metal shell and the nonlinear crystal The temperature is consistent, the voltage of the positive gold-plated surface is consistent with the positive voltage of the external circuit, and the nonlinear crystal and the positive gold-plated surface are deformed to eliminate the nonlinear crystal stress; the thermally and electrically conductive elastic material layer is arranged between the negative gold-plated surface and the metal shell The heat-conducting and electrically-conducting elastic material layer is used to keep the temperature of the metal shell and the nonlinear crystal consistent, the voltage of the metal shell and the gold-plated surface of the negative electrode to be consistent, and deform with the nonlinear crystal and the gold-plated surface of the negative electrode to eliminate the stress of the nonlinear crystal. It not only ensures the uniform power supply and heating of the crystal electrode, but also effectively eliminates the stress generated by the nonlinear crystal and the gold-plated surface, improves the stability of the crystal, can maintain stable working parameters in a wide temperature range, and prolongs the service life of the device.

Description

Technical field: [0001] The invention relates to an optical modulation device in the field of lasers and optical communication, in particular to a high and low temperature optical modulator. Background technique: [0002] Conventional nonlinear crystal electro-optic modulators use a structure in which a modulation electric field is applied horizontally or vertically, and light passes along the optical axis. It needs to be gold-plated on the two electrode surfaces of the crystal, and a variable high-voltage electric field is introduced by the gold-plated electrodes. Nonlinear crystals will expand with heat and contract with cold when used in high and low temperature environments. At present, the gold-plated electrodes of nonlinear crystals are in rigid contact with the shell. This rigid direct connection will cause stress to the electro-optic crystal or crystal fixture. , causing negative effects such as displacement and deformation of the crystal, and the stress will affect ...

AI Technical Summary

Problems solved by technology

Nonlinear crystals will expand with heat and contract with cold when used in high and low temperature environments. At present, the gold-plated electrodes of nonlinear crystals are in rigid contact with the shell. This rigid direct connection will cause stress to the electro-optic crystal or crystal fixture. , causing negative effects such as displacement and deformation of the crystal, stress will affect the optical uniformity of the crystal, thereby changing the birefringence parameters and extinction ratio of the crystal, etc.

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