A Low-Crosstalk, High-Performance Optimization Method for Photonic Lantern-Type Mode Multiplexers

Abstract

The invention discloses a low-crosstalk, high-performance photon lantern-type mode multiplexer optimization method, which belongs to the technical field of optical fiber communication. The photon lantern model is determined, and the parameters of the inner diameter of the glass casing at the tail end of the photon lantern and the refractive index of the glass casing are determined. Scanning; analyze and calculate the relationship between the crosstalk of the photon lantern mode and the mode purity; perform a parameter scan on the inner diameter of the glass sleeve at the end of the photon lantern and the refractive index of the glass sleeve again; comprehensively analyze the above two parameter intervals to determine the optimal photon lantern The inner diameter of the glass tube at the end and the refractive index of the glass tube make it satisfy the photonic lantern with low crosstalk, high coupling efficiency and high mode purity at the same time. By optimizing the inner diameter of the glass sleeve at the output end of the photon lantern and the refractive index of the glass sleeve, the crosstalk between the various modes of the photon lantern is reduced, and the mode purity and coupling efficiency of each mode of the photon lantern are improved. The optimization method provided by the invention is compatible with the existing manufacturing process and can be realized in actual manufacturing.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and specifically relates to a method for optimizing a low-crosstalk, high-performance photonic lantern-type mode multiplexer. Background technique [0002] With the rapid development of information and communication technology today, people's demand for network bandwidth is increasing exponentially, and the transmission rate and capacity of single-mode optical fiber communication systems are getting closer and closer to the nonlinear Shannon limit, making single-mode optical fiber (Single-Mode Fiber, SMF) communication system has been unable to meet the current demand for communication capacity. Therefore, seeking a high-speed and large-capacity communication system has become a major challenge in the current optical communication technology. A mode division multiplexing (MDM) system based on few-mode fiber (Few-Mode Fiber, FMF) can pass through a limited number of The indepe...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the unsatisfactory performance of the current photon lantern, the present invention proposes and invents an optimization method for a low-crosstalk, high-performance photon lantern-type mode multiplexer. By optimizing the structural parameters of the photon lantern, the distance between each mode of the photon lantern crosstalk, improve performance such as mode coupling efficiency and mode purity

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