Plenoptic Adder and Subtractor Based on Nonlinear Polarization Rotation Effect

Abstract

The invention discloses a nonlinear polarization rotation effect based all-optical adding and subtracting device. The all-optical adding and subtracting device comprises a set of input polarization controllers, a set of optical attenuators, a light-combining device, a nonlinear polarization rotation device, a light splitting device, a set of polarization controllers and a set of polarized beam splitters. The device adopts a principle as follows: after data light and non-modulated light are simultaneously injected into a nonlinear optical fiber or a nonlinear waveguide, an optical power change is introduced into a nonlinear relative phase shift, thereby resulting in the rotation of polarization states of optical signals. At the output end of the nonlinear optical fiber or waveguide, the orthogonal polarization states of multiple wavelength signals are simultaneously filtered by the light splitting device and the polarized beam splitters, so that various basic combinational logics are completed, and an all-optical half adder, a half-subtracter, a full adder and a full subtracter are realized. According to the invention, the logic operation of signals is directly completed in an optical domain, so that an electronic bottleneck is broken through, and a Tb / s-magnitude all-optical adding and subtracting operation can be realized, and therefore, the device disclosed by the invention can be applied to the fields of light-speed optical signal processing and light-speed optical switching networks and the like.

Description

technical field [0001] The invention belongs to the technical field of high-speed optical signal processing, and specifically relates to an all-optical adder and subtractor based on the nonlinear polarization rotation effect, that is, to use the nonlinear rotation of the polarization state in a semiconductor optical amplifier, an optical fiber or an optical waveguide to simultaneously realize an all-optical Optical adder and all-optical subtractor. Background technique [0002] In recent years, with the increasing demand and dependence on information, a new generation of ultra-high-speed optical communication networks, especially optical packet switching networks, is becoming a research hotspot in the world. In the optical packet switching network, with the reduction of the packet length and the increase of the packet switching speed, high-speed, low-latency all-optical signal processing has become a bottleneck restricting the further development of the optical network. The...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that a nonlinear device in the existing all-optical logic device can only realize the basic logic, and provide an all-optical adder and subtractor based on the nonlinear polarization rotation effect, so as to realize ultra-high speed by using a single nonlinear device All-optical adder and all-subtractor

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