An Arbitrary Mode Accurate Conversion Method Based on Simulated Annealing Algorithm

Abstract

The invention provides a method for accurately converting arbitrary modes in an independently-multiplexed mode division multiplexing optical fiber communication system and a network. The method can perform arbitrary mode conversion accurately and flexibly and plays a key role in achieving exchange with modes serving as granularities. The method for accurately converting arbitrary modes based on a simulated annealing algorithm is provided to meet needs of data exchange among different modes. According to the method, a binary phase spatial light modulator serves as the key part of mode conversion, and arbitrary mode conversion is achieved without changing any physical devices by means of the characteristic that a program of the spatial light modulator is reconfigurable. By means of the simulated annealing algorithm, an approximate optimal value can be achieved, the optimal phase function of the converted plane is calculated out, amplitude damage caused by the phase spatial light modulator can be compensated effectively, therefore, an accurate phase transfer function converting a mode to be converted into a target mode is established, and accurate conversion of arbitrary modes can be achieved.

Description

technical field [0001] The method relates to the field of mode division multiplexing optical fiber communication, more specifically, relates to an arbitrary mode precise conversion method suitable for mode division multiplexing optical fiber communication system and network. Background technique [0002] With the widespread application of new technologies such as cloud computing, big data, and mobile Internet, network traffic has shown a rapid growth of 10 times every 4 years. In single-mode fiber, according to the Shannon capacity limit caused by the nonlinear effect of the fiber, the number of single-mode fiber that is about to reach the capacity limit is increasing. In order to solve the capacity crisis of the single-mode optical fiber system, space-division multiplexing technology based on multi-core fiber (Multi-Core Fiber, MCF) or multi-mode / few-mode fiber (Multi-Mode / Few-Mode Fiber, MMF / FMF) is applied It has become a hot spot in the field of optical fiber communicat...

AI Technical Summary

Problems solved by technology

Using the characteristic that the simulated annealing algorithm can approach the optimal value, calculate the optimal binary phase function of the transformation plane, effectively compensate the problem that the phase-type SLM can only modulate the phase and cause amplitude damage, so as to establish an accurate phase between the mode to be converted and the target mode type transfer function for precise conversion of any mode

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