A full optical buffer based on proton crystal optical fiber

Abstract

The invention relates to an all-optical buffer based on a photonic crystal fiber and pertains to the all-optical buffer devices in an optical network, which solves the problems that the existing optical buffers have high pump power and optical circuits are easy to be damaged. The invention comprises a data caching optical circuit which is composed of a highly-nonlinear photonic crystal fiber, etc., and a read and write control optical circuit. The invention is provided with a Mach-Zehnder switch at an input terminal and a Mach-Zehnder switch at an output terminal between which the data caching optical circuit and a direct data channel composed of the optical fiber pass through in parallel; the Mach-Zehnder switch at an input terminal and the Mach-Zehnder switch at an output terminal are controlled by a buffer on-off controller so as to select optical signals to pass through the direct data channel or the data caching optical circuit. The all-optical buffer of the invention can realizethe continuous and controllable cache time of the optical signal under rather low pump optical power and has simple structure, low cost, a short signal storage medium, low energy consumption of the system as well as continuous and adjustable cache time, and has universality to the photonic crystal fiber of a small mode field.

Description

technical field [0001] The invention belongs to an all-optical buffering device in an optical network, which uses a highly nonlinear photonic crystal fiber as a data storage medium to realize time-continuous and controllable buffering of optical signals at very low pump spectrum optical power. Background technique [0002] A communication network consists of nodes that generate, transmit, route, and store information, and a transmission medium that connects nodes. With the rapid development of optical communication, an all-optical network based on optical switching will become an inevitable trend of communication network. Since the essence of optical switching is store-and-forward, implementing optical signal buffering in optical communication can solve key problems in optical switching networks such as optical signal port contention and packet loss, but there is a lack of an all-optical buffer with continuously adjustable storage time Devices are a bottleneck in modern opt...

AI Technical Summary

Problems solved by technology

[0004] The invention provides an all-optical buffer based on a photonic crystal fiber, which solves the problems of high pump power and easy damage to the optical path in the existing optical buffer, and uses a highly nonlinear photonic crystal fiber (HNL-PCF) as a storage medium. Realize the time-continuously adjustable all-optical cache of optical data packets, improve the rate and efficiency of all-optical switching / routing, reduce the packet loss rate and bit error rate of network nodes in high-speed optical communication systems, and improve the throughput of network nodes

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