PLC-based multi-wavelength integrated tunable laser assembly

Abstract

The invention relates to the field of coherent light communication technology, and particularly to a PLC-based multi-wavelength integrated tunable laser assembly. The assembly comprises a PLC chip, a plurality of DFB chips which are arranged at the edge of the PLC chip in an integrated manner, a plurality of lenses which are arranged at the side surfaces of the PLC chip and correspond with the DFB chips, a photodiode array and an array waveguide grating. A waveguide optical path for transmitting a laser beam is etched on the PLC chip. The laser beam is coupled into the PLC chip through a total reflection lens. An optical path on the PLC chip divides the output beam of each DFB chip to two paths. One path is guided into an interference optical path on the PLC chip. The output light after interference is transmitted to the photodiode array and is converted to a current signal, and the other path of output beam is transmitted into the array waveguide grating. Through different distances of transmission and interference, the light beam is coupled for obtaining one light beam at the output end, wherein the light beam is output to a module for use. The PLC-based multi-wavelength integrated tunable laser assembly can realize multi-wavelength combined-wave output, thereby improving transmission capability by times.

Description

technical field [0001] The invention relates to the technical field of coherent optical communication, in particular to a tunable laser component. Background technique [0002] With the rapid increase of the amount of network information, the demand for network bandwidth is getting higher and higher, and the network bandwidth required for big data transmission has gradually become a bottleneck. At present, the mainstream single-wavelength transmission rate of the DWDM system of the optical fiber backbone network is 100Gbps, and the single-wavelength transmission rate will gradually increase to 200Gbps, 400Gbps or even 1Tbps in the next few years. [0003] In high-speed DWDM communication systems, high-performance tunable lasers play an important role. High-speed coherent communication systems propose wide tuning range, high frequency stability, narrow linewidth, high power, low power consumption, and small size for tunable lasers. Requirements for volume and other character...

AI Technical Summary

Problems solved by technology

However, the current tunable transmission modules usually can only output one wavelength at the same time, so it is necessary to study a transmission module that can output multiple wavelengths at the same time, so as to double the transmission capacity.

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