A passively coupled small size photodetector

Abstract

The invention discloses a passively coupled small-size photodetector, in particular to the technical field of semiconductor detection products, including a semiconductor photodetector, and a package assembly is arranged on the semiconductor photodetector; the package assembly includes a package body, A first cavity, a T-shaped connecting slot and a second cavity are opened inside the package body, a limit chute is set at the top and bottom of the package body, and a first semicircle is arranged inside the first cavity Clamping block and second semicircular clamping block. By adopting a semiconductor photodetector with a planar structure, the present invention designs a reasonable size of the photosensitive surface, ensures the minimum dark current of the device, meets the low noise requirement of low optical power detection, and designs a semiconductor photoelectric device with low dark current, high response and stable performance. For the detector, the semiconductor photodetector is clamped and fixed inside the first cavity, and passive coupling is used in the production process, which greatly improves the production efficiency and reduces the cost.

Description

technical field [0001] The present invention relates to the technical field of semiconductor detection products, and more particularly, to a passively coupled small-size photodetector. Background technique [0002] The principle of photodetector is that the conductivity of the irradiated material changes due to radiation. Photodetectors are widely used in various fields of military and national economy. In the visible light or near-infrared band, they are mainly used for ray measurement and detection, industrial automatic control, Photometry, etc. In the infrared band, it is mainly used for missile guidance, infrared thermal imaging, infrared remote sensing, etc. Another application of photoconductor is to use it as the target surface of the camera tube. In order to avoid image blur caused by the diffusion of photogenerated carriers, continuous film The target surface is made of high-resistance polycrystalline material, and other materials can be embedded in the target surfa...

AI Technical Summary

Problems solved by technology

[0003] At present, the development and production of photodetectors for optoelectronic devices are generally based on active coupling, that is, the laser is used as the light source output, coupled to the PD detector through the optical fiber alignment, and then the optical fiber and the PD detector are fixed. During the coupling alignment process, the operation is inconvenient. , requires a lot of manpower and material resources, which increases the production cost

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