Optical module

Abstract

An optical module provided by the invention comprises a circuit board, a light source, and a silicon optical chip, an MCU, a first sampling circuit, a second sampling circuit and a locking circuit which are arranged on the circuit board, wherein the silicon optical chip receives light which is emitted by the light source and does not carry a signal through an input light port of the silicon optical chip, modulates the light which does not carry the signal into signal light and outputs the signal light through an output light port of the silicon optical chip; the MCU is connected with a direct current bias signal interface of the silicon optical chip; the first sampling circuit is connected with a first monitoring light port of the silicon optical chip, receives the signal light transmitted by the first monitoring light port and outputs a first sampling voltage; the second sampling circuit is connected with a second monitoring light port of the silicon optical chip, receives the signal light transmitted by the second monitoring light port and outputs a second sampling voltage; and the locking circuit is connected with the direct current bias signal interface of the silicon optical chip. In the optical module, the amplitude of the first sampling voltage and the amplitude of the second sampling voltage approach each other, so that the silicon optical chip is maintained at the optimal working point.

Description

technical field [0001] The present application relates to the technical field of optical fiber communication, and in particular to an optical module. Background technique [0002] Optical communication technology will be used in new business and application modes such as cloud computing, mobile Internet, and video. In optical communication, the optical module is a tool to realize the mutual conversion of photoelectric signals, and it is one of the key components in optical communication equipment. Among them, the use of silicon photonic chips to realize the photoelectric conversion function has become a mainstream solution adopted by high-speed optical modules. [0003] In the silicon photonics module, the silicon photonics chip includes an MZ (Mach-Zehnder, Mach-Zehnder) modulator. The optical carrier signal emitted by the laser enters the MZ modulator, and the high-speed data stream is loaded on the optical carrier signal in the form of driving voltage to complete the op...

AI Technical Summary

Problems solved by technology

[0004] However, with the influence of a series of external conditions such as time, ambient temperature, laser state, fiber insertion and coupling loss, the optimal operating point of the modulator will drift, resulting in poor output signal quality and increased bit error rate. Effect

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