Lithium niobate substrate fixture with liquid level detection function and proton exchange method

Abstract

The invention discloses a lithium niobate substrate clamp with a liquid level detection function and a proton exchange method. When a microporous ceramic filter piece at the bottom of the clamp is in contact with proton exchange liquid, the proton exchange liquid is adsorbed on water absorption sponge through the capillary action; a humidity-sensitive element is wetted to change a resistance value of the humidity-sensitive element so as to change the brightness of a signal indicator lamp in a detection circuit; and a signal prompt that the liquid level of the proton exchange liquid is detected at the bottom of the clamp is given. During proton exchange, before a lithium niobate substrate is immersed in the proton exchange liquid for the proton exchange, the liquid level detection function of the clamp can be utilized for enabling the bottom of the clamp to be in contact with the liquid surface of the proton exchange liquid for secondary preheating to enable a temperature difference between the part, loaded with the lithium niobate substrate, of the clamp and the proton exchange liquid to tend to be zero, so that the temperature fluctuation caused by immersion of the lithium niobate substrate in the proton exchange liquid in the proton exchange process can be reduced, and the stability and repeatability of making a lithium niobate optical waveguide by the proton exchange can be improved.

Description

technical field [0001] The invention relates to the technical field of integrated optics, in particular to a lithium niobate substrate fixture with a liquid level detection function and a proton exchange method. Background technique [0002] With the continuous development of integrated optical technology, integrated optical waveguide devices have been widely used due to their advantages of small size and diverse functions. In the fiber optic gyro system, the lithium niobate optical waveguide modulator can be used to replace the beam splitter, polarizer and phase modulator in the all-fiber solution, that is, the lithium niobate optical waveguide can integrate three functions, which can effectively reduce the The small size of the gyroscope reduces the number of fiber fusion points. Compared with the all-fiber gyroscope, the integrated optical gyroscope has a larger modulation bandwidth. [0003] At present, the method of using proton exchange to manufacture lithium niobate ...

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Problems solved by technology

[0005] In view of this, the present invention provides a lithium niobate substrate fixture with a liquid level detection function and a proton exchange method to solve the problem of large temperature fluctuations of the proton exchange liquid in the proton exchange process

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