Adjustable-delay optical buffer based on ring-shaped resonant cavity

Abstract

The invention discloses an adjustable-delay optical buffer based on a ring-shaped resonant cavity, wherein the connection of each part is as follows: a first port of an optical coupler (20) is connected with a to-be-buffered optical signal (10), a third port of the optical coupler (20) is connected with buffer unit input (111) of a first ring-shaped resonant cavity buffer unit by an optical isolator (50) to form an optical signal input part; a second port of the optical coupler (20) is connected with an optical oscilloscope (30), a fourth port of the optical coupler (20) is connected with output of an optical isolator (60) to form an optical signal output part; output (121, 221, ..., N21) of the first to the N-th ring-shaped resonant cavity buffer units are respectively connected with input (211, 311, ..., N11) of the second to the N-th ring-shaped resonant cavity buffer units and the input of the second optical isolator (60) to form an optical signal buffer part; and a bit generator (40) is used for controlling a first to a N-th optical phase modulators (1111, 1112, ..., 111N) to form an optical signal delay regulating part.

Description

technical field [0001] The invention belongs to the technical field of optical communication, is suitable for storing, controlling and processing high-speed optical signals, and in particular relates to an all-optical buffer based on a ring resonant cavity with adjustable delay. Background technique [0002] The information network is composed of transmission and exchange. At present, the transmission part has completed the revolution from electricity to light. However, it obviously does not match the ultra-large-capacity optical transmission. The processing of information still uses electronic devices, which are limited by photoelectric conversion and electronic devices. The speed of data processing can easily cause congestion of the information network. In order to effectively improve the throughput of all-optical network nodes and avoid network competition among different users, an optical buffer device that can effectively delay or buffer optical signals is urgently need...

AI Technical Summary

Problems solved by technology

[0004] For slowing down the speed of light, the most effective method is the electromagnetically induced transparency (EIT) technology based on the quantum coherence effect, but because it needs to be carried out at ultra-low temperature (close to absolute zero), the experimental system is too complicated and expensive

In addition, there are methods to slow down the speed of light by using high-dispersion two-dimensional waveguide photonic crystals, such as [Lu Peixiang, Yang Zhenyu, Chen Wei, etc., "An all-optical buffer based on photonic crystal fiber", National Invention Patent, 200810047325.X ], but it is difficult to connect photonic crystals to single-mode optical fibers for communication, and has high insertion loss and polarization dependence

In addition, some people have recently proposed the use of broadband stimulated Brillouin scattering, stimulated Raman amplification or nonlinear Bragg grating to slow down the speed of light, but these schemes are still in the stage of theoretical analysis and are far from being practical. Degree

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