Optical detector

Abstract

The invention discloses an optical detector which comprises a light reflection unit, an optical detection unit and a filtering unit from top to bottom, the center of the light reflection unit, the center of the optical detection unit and the center of the filtering unit are located on the same straight line, and the light reflection unit, the optical detection unit and the filtering unit are in mirror symmetry about the straight line. The optical reflection unit comprises a symmetrical oblique reflection structure, the reflectivity of the symmetrical oblique reflection structure is not less than a preset reflectivity, the oblique reflection angle of the symmetrical oblique reflection structure is not less than a preset angle, the optical detection unit comprises a light absorption layer, the filtering unit comprises a first reflector and a second reflector, and the first reflector and the second reflector are oppositely arranged in parallel. Through multiple absorption enhancement effects and independent filtering selection characteristics, the mutual restriction relationship among quantum efficiency, response speed and spectral line width is greatly relieved, and the characteristics of easy integration, ultra-narrow spectral line width, large tuning range, high quantum efficiency, high response speed and the like are realized.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a photodetector. Background technique [0002] With the continuous development of the information age, high-speed and large-capacity data transmission has become the goal that people are constantly pursuing. Since the transformation and progress of optical communication systems and networks often depend on the development of materials, processes and structures of devices, in the face of the growing demand for high-speed and large-capacity optical communication services, it is necessary to effectively improve the performance of key optoelectronic devices in optical communication systems. Performance will be the way to go. With the continuous emergence of various optical functional devices with excellent performance, optoelectronics is continuously promoted to miniaturization and integration. [0003] In optical communication systems, photodetectors with high speed and hi...

AI Technical Summary

Problems solved by technology

However, due to the light absorption of the photodetector, the spectral linewidth of the RCE photodetector will be broadened, usually greater than 20nm, making it difficult to be directly applied to dense wavelength division multiplexing systems

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