Multi-code type adjustable transmitter capable of phase automatic calibration

Abstract

Disclosed is a self-calibration multi-code adjustable transmitter, which comprises: data source, continuous wave laser, intensity modulator, delay line, phase modulator, clock, adjustable frequency divider, monitoring module and phase shifter. The output of data source is separately connected with one of inputs of intensity modulator and input of the monitoring module; the other input of the intensity modulator is connected with the output of continuous wave laser; the output of the clock is connected with the input of adjustable frequency divider; the outputs of the adjustable frequency divider and monitoring module are separately connected with two inputs of the phase shifter; the output of phase shifter is connected with one of inputs of the phase modulator and the other input is connected with intensity modulator via delay line. The invention has the advantages of meeting different systems' requirements and resolving the transmission performance dependency on bits stream.

Description

technical field [0001] The invention relates to a transmitter in the technical field of optical fiber communication, in particular to a multi-code adjustable transmitter with automatic phase calibration. Background technique [0002] The data transmission rate of optical communication is increasing exponentially. In 1990, AT&T put the 2.5Gb / s WDM system into use. In 1997, Nortel launched the 10Gb / s system. Lucent launched the 40Gb / s WDM system in 2002. s and 160Gb / s system will be the data rate of the backbone network of the next generation. This is because the high-speed system has several significant advantages: firstly, the transmission cost per bit is reduced, and the cost of terminal equipment only increases by 2.5 times for every 4-fold increase in data rate; for a WDM system with the same capacity, the high-speed system can reduce terminal Number to reduce system size and power consumption; In addition, the reduction in the number of wavelengths can also simplify net...

AI Technical Summary

Problems solved by technology

The above results show that this technology cannot dynamically meet the performance requirements of different high-speed transmission systems; at the same time, no solution is given for the dependence of the transmission performance of the phase modulation signal on the bit stream

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