Dimmable Pulse Buffer

Abstract

The invention discloses an adjustable optical pulse buffer, and is applicable to the field of optical signal storage and control. The adjustable optical pulse buffer is characterized in that first ports of first and second 2*2 optical couplers (11) and (12) are respectively connected with an optical pulse laser device (1) and a high-speed optical detector (4) by first and second optical isolators (31) and (32); second ports of the first and second 2*2 optical couplers (11) and (12) are respectively connected with first and third ports of a fourth 2*2 optical coupler (14) by first and second single-mode optical waveguides (41) and (42) and first and second optical phase modulators (21) and (22); third ports of the first and second 2*2 optical couplers (11) and (12) are connected with each other by a third single-mode optical waveguide (43); fourth ports of the first and second 2*2 optical couplers (11) and (12) are respectively connected with first and third ports of a third 2*2 optical coupler (13), second ports of the third 2*2 optical coupler (13) and the fourth 2*2 optical coupler (14) are connected with each other; fourth ports of the third 2*2 optical coupler (13) and the fourth 2*2 optical coupler (14) are connected with each other by an adjustable optical delay line (3).

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 particularly relates to an adjustable optical pulse buffer. 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 needed. [0003] The transmission time of the...

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, which have 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

Images