Wavelength division multiplexing system with power balancing effect and preparation method thereof

Abstract

The invention discloses a wavelength division multiplexing system with a power balancing function and a preparation method thereof, and belongs to the technical field of silicon dioxide / polymer mixed waveguide optical integrated chips. The multi-channel wavelength division multiplexer and the variable optical attenuator array are integrated on the same chip, a wide-spectrum light source is coupled into the wavelength division multiplexer, and light with different wavelengths is divided into different channels through the wave division effect of the wavelength division multiplexer and then enters different variable optical attenuators; because the power among the channels of the wavelength division multiplexer is unbalanced, the power balance of the output channels can be realized by tuning the variable optical attenuator. According to the wavelength division multiplexing system with the power balancing function, the silicon dioxide / polymer mixed waveguide PLC technology is adopted, and the power consumption of the system is reduced by utilizing the advantages that the silicon dioxide lower cladding is good in heat dissipation and low in loss and the thermo-optical coefficient of the polymer core layer and the polymer upper cladding is large. The method is very suitable for the fields of optical communication, optical calculation and the like, and has a very strong application prospect.

Description

technical field [0001] The invention belongs to the technical field of silicon dioxide / polymer hybrid waveguide optical integrated chips, in particular to a wavelength division multiplexing system with power equalization and a preparation method thereof. Background technique [0002] Planar Lightwave Circuit (PLC) because its process is compatible with Complementary Metal Oxide Semiconductor (CMOS) process, it is easy to realize miniaturized and integrated multi-functional photonic integrated chips, and has won scientific research units, Extensive research in colleges and universities, and occupy a certain market. Polymer PLC devices prepared with polymer materials have the advantages of simple preparation process, low cost, low loss, and high coupling efficiency with optical fibers. In particular, the thermo-optic coefficient of polymer materials is an order of magnitude higher than that of silica, which is very suitable for The preparation of low-power thermo-optic device...

AI Technical Summary

Problems solved by technology

[0004] 1. The unbalanced receiving energy will eventually lead to energy fluctuations exceeding the dynamic range allowed by the receiver;

[0005] 2. The imbalance of the cumulative signal-to-noise ratio (Signal Noise Rate, SNR) will lead to an increase in the bit error rate (Bite Error Rate, BER) for a certain wavelength;

[0006] 3. Due to insufficient gain, the signal strength of the smallest channel may be lower than the sensitivity of the receiver, resulting in the receiver being unable to detect the signal

As the number of channels in the WDM system increases, the number of connected VOAs will also increase, and the wavelengths covered will become more, and the power imbalance in the channels will also increase accordingly. In order to reduce design and manufacturing costs, it has power balance Functional WDM system urgently needs to be developed

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