A package package that can improve the output noise of an optical electric field sensor

Abstract

The packaging tube case of the present invention includes a main body and a cover plate, the main body includes a bottom plate and a plurality of side plates, the bottom plate and a plurality of side plates form an accommodating space, and two opposite side plates in the plurality of side plates are respectively provided with pigtail through holes , There is a supporting platform in the accommodation space, and the supporting platform is provided with a mounting groove, and the optical electric field sensor chip with a fixed size matching the mounting groove does not require a lithium niobate gasket, which eliminates the resonance caused by the gasket and is superimposed on the measurement result noise above. The axes of the first pigtail through-hole and the second pigtail through-hole in the main body are not on the same straight line, which eliminates the stress on the pigtail and helps avoid breakage at the pigtail of the optical sensor. The cover plate has a stepped structure, and its size matches the inner diameter of the main body. The silica gel fills the gap around the joint between the cover plate and the main body. Performance Impact of Optical Sensor Die.

Description

technical field [0001] The invention belongs to the field of optoelectronics, and in particular relates to a packaging tube shell capable of improving the output noise of an optical electric field sensor. Background technique [0002] Integrated optical electric field sensors are widely used in the field of electric field measurement due to their advantages of wide frequency band and small size. The basic principle of the integrated optical electric field sensor to measure the electric field is based on the electro-optic effect of a specific crystal. Through the phase modulation of the electric field to be measured on the polarized light transmitted in the integrated optical electric field sensor, polarized light carrying the information of the electric field to be measured is generated, and the modulated polarization The light signal undergoes photoelectric conversion and is amplified to form an electrical signal. [0003] Lithium niobate is an electro-optic crystal common...

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Problems solved by technology

[0004] In the past, in order to buffer the thermal expansion difference between the shell material and the lithium niobate wafer, another lithium niobate crystal is usually used as a spacer, and the geometric size of the spacer is generally larger than that of the lithium niobate wafer. It will introduce noise at a certain resonant frequency, which will affect the measurement results

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