Polarization type optical caching device and regulating method thereof

Abstract

A polarization type optical buffer together with the adjusting method is designed for the low turning on and off speed and the instability of the avoiding polarization state, namely using the nonlinear rotation of the polarization state in a semiconductor optical amplifier or an optical fiber as a polarization control switch to realize the optical buffer to cache the data packet signal. The optical buffer consists of an input polarization controller, a polarization beam combiner, a nonlinear polarization rotation functional unit, a polarization beam splitter and a polarization maintaining fiber, wherein, the nonlinear polarization rotation functional unit consists of a front polarizer, a tail polarizer, the controllable non-linear rotation functional parts and an online monitoring unit of the polarization state composed by an optical fiber coupler and a polarization controller. The instability of the polarization can be avoided by adjusting the polarization type optical buffer to the polarized rotation. The polarization type optical buffer of the invention has the advantages that the reading and writing speed is high and the buffer depth of an optical fiber ring reaches above 90%, thereby being good for the cascade.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a polarization optical buffer and its adjustment method, which utilizes the nonlinear rotation of the polarization state in a semiconductor optical amplifier or an optical fiber as a polarization control switch to implement data grouping signals. Cached optical buffer. Background technique [0002] With the development of high-speed all-optical networks, the shortcomings of wavelength switching are gradually emerging. All-optical networks are transitioning from optical wavelength switching networks with wavelength as the granularity of switching to optical packet switching networks with packet granularity. Optical packet switching will become an all-optical network. One of the important directions of the network. All-optical packet switching is essentially a store-and-forward technology, so how to complete the storage of optical data packets in the optical ...

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to provide a polarization type optical buffer and its adjustment method, which is designed for the problem that the switching speed of the current optical buffer is not fast enough to avoid the instability of the polarization state

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