High-efficiency photoelectric detector based on oblique ball lens optical fiber coupling

Abstract

The invention discloses a high-efficiency photoelectric detector based on oblique ball lens optical fiber coupling, and belongs to the field of integrated optoelectronic devices and photoelectric detection. Generally, the photosensitive surface of the photoelectric detector is inversely proportional to the rate, and the higher the rate is, the smaller the photosensitive surface is. In order to solve the problem that in a high-speed microwave photon link, the coupling efficiency of a photoelectric detector is limited by a packaging structure and a coupling mode, an oblique ball lens optical fiber with a total reflection surface and a photoelectric detector chip are subjected to optical coupling, and light transmitted in the optical fiber is reflected by 90 degrees through an oblique ball lens with a total reflection surface and is focused; the shrunk light spots are output and coupled to the photosensitive surface of the detector so as to ensure that the light can be completely irradiated on the photosensitive surface of the photoelectric detector. The light emitted from the oblique ball lens optical fiber has a small light spot size and is efficiently coupled with a high-speed and low-photosensitive-surface photoelectric detector, so that the performance of the coupled and packaged photoelectric detector can be improved, and the overall gain and signal-to-noise ratio of a microwave photon link are improved.

Images