Bi-directional optical sub assembly for high-speed long-distance transmission

Abstract

Embodiments of the invention provide a bi-directional optical sub assembly for high-speed long-distance transmission. The bi-directional optical sub assembly comprises a laser diode, a photodetector,an auxiliary photodetector, a COMS ASIC chip, and a wavelength division multiplexing filter of an outreach fiber; wherein the laser diode, the photodetector, the auxiliary photodetector, the COMS ASICchip and the wavelength division multiplexing filter are all packaged in the same metal cavity. In the bi-directional optical sub assembly, an auxiliary receiving link is integrated in the CMOS ASICchip, thereby controlling an emitted laser signal, compensating the impact of working point deviation due to aging and temperature of the laser diode, maximizing the efficiency of the laser diode, andmeeting the requirement of long-distance transmission; due to the assembly mode, the whole electronic device based on the bi-directional optical sub assembly has more complete function, modules are connected inside the chip, so that loss caused by external connection of a circuit board is reduced; and the ASIC function is realized integrally, and the equipment is assembled more conveniently and consistently.

Description

technical field [0001] The invention relates to the field of optical network equipment, in particular to an integrated optical transceiver component for high-speed and long-distance transmission. Background technique [0002] At present, with the development of society, the broadband network is also developing rapidly. At present, optical fiber is the most ideal among various transmission media in broadband network. It is characterized by large transmission capacity, good transmission quality, low loss, medium After a long distance and so on. Optical fiber broadband is to convert the data to be transmitted from electrical signals to optical signals for communication. Both ends of the optical fiber are equipped with "optical cats" for signal conversion. Optical modem, also known as single-port optical transceiver, is an optical fiber transmission device developed for special user environments. [0003] However, the current optical fiber transmission equipment adopts the ex...

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Problems solved by technology

[0003] However, the current optical fiber transmission equipment adopts the external assembly method, which will cause splicing line loss, low consistency, high difficulty in assembling high-speed optical components, and the yield rate will be affected.

At the same time, the working temperature of the electronic devices in the external assembly method is difficult to be accurately monitored, thus affecting the efficiency of converting electrical signals to optical signals to a certain extent and affecting the transmission distance

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