An optical transceiver module with modulator arms capable of independent modulation

Abstract

The invention discloses an optical transceiver module with double arms of a modulator capable of achieving modulation independently. The optical transceiver module comprises a laser device, a laser device drive circuit, a transmitting-end optical assembly, a receiving-end optical assembly, a modulator drive circuit, a receiver circuit and a microprocessor, wherein the transmitting-end optical assembly comprises a Mach-Zehnder modulator, the modulator drive circuit comprises a first-stage amplifier and two second-stage amplifiers connected to the output end of the first-stage amplifier in parallel, the output ends of the two second-stage amplifiers are connected with the Mach-Zehnder modulator respectively, and different modulation voltages of two drive sub-circuits are controlled through the microprocessor. In this way, different modulation depths of the left and right arms of the Mach-Zehnder modulator are achieved, longer-distance transmission is achieved, and optical transmission cost is greatly reduced; besides, because the modulator drive circuit is in communication with the microprocessor, only an internal drive circuit and I2C communication between the microprocessor and the drive circuit rather than input and output of a client are needed to be additionally designed, and the optical transceiver module has good compatibility.

Description

technical field [0001] The invention relates to an optical transceiver module whose dual arms of a modulator can be independently modulated, and belongs to the field of optical fiber transmission. Background technique [0002] The optical transceiver module based on the Mach-Zehnder modulator can realize intensity modulation and phase modulation by changing the phase. Because its chirp can be controlled by the splitting ratio and bias voltage of the two arms, it can realize long-distance transmission. It plays an increasingly important role in backbone networks such as metropolitan and ultra-long-distance transmission optical networks. At present, high-speed modulators in optical networks are all improved based on Mach-Zehnder modulators. [0003] The Mach-Zehnder modulator can realize negative chirp and zero chirp by adjusting the waveguide length of the left and right arms and the ratio of split light. However, the dual-arm push-pull modulation commonly used at present l...

AI Technical Summary

Problems solved by technology

However, the dual-arm push-pull modulation commonly used at present limits the performance of the modulator, and the propagation distance of the intensity-modulated optical transceiver module in general optical fiber communication is relatively short (80km)

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