Optical receiving unit structure for optical fiber communication

Abstract

The invention provides an optical receiving unit structure for optical fiber communication. The optical receiving unit structure comprises an optical multiplexing / de-multiplexing unit, a plurality of optical detectors, and a post electrical transmission unit; after dense wavelength division multiplexing optical signals are de-multiplexed by the optical multiplexing / de-multiplexing unit according to a wave length, the optical signals of different wave lengths are respectively led to an individual optical detector, and each optical detector converts the optical signals of the processed wave length into electrical signals; and the post electrical transmission unit performs layout and arrangement on electrical signals outputted by the plurality of optical detectors and then outputs the electrical signals. Optical crossbar switches in the optical detectors are used for deploying optical signals of the same wave length according to a time interval of the signals of this wave band, and deploying each optical signal divided according to a time sequence to an individual photovoltaic conversion element; and each photovoltaic conversion element performs photovoltaic conversion according to the time sequence of obtaining the optical signals. The optical receiving unit structure for the optical fiber communication provided by the invention can process the optical signals which are much larger than the response frequency of single optical detector, and achieve the bandwidth multiplication of the detectors.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a light receiving unit. Background technique [0002] In recent years, the communication network has developed rapidly. With the widespread popularization of optical fiber communication, the communication network is facing an urgent need to provide faster transmission rate, shorter delay, higher frequency band and lower operating cost. Due to the shortage of optical fiber resources, the high cost of new laying, and the long distance distribution of base stations, the demand for single-fiber bidirectional optical transceiver modules in small pluggable (SFP+) packages is gradually increasing. [0003] The SFP bidirectional optical transceiver module is divided into two parts: optical receiving and optical transmitting. The optical receiving part is composed of optical receiver, transimpedance amplifier, limiting amplifier and corresponding power supply devices. The main dev...

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Problems solved by technology

[0005] In the future, optical communication will require more and more bandwidth. If the response speed of optical detectors cannot be broken through under the existing conditions, then future optical detectors will seriously restrict the development of optical communication bandwidth.

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