Adjustable optical dispersion compensator based on double-ring resonator

Abstract

The invention relates to an optical dispersive compensator which is based on a double-ring shaped resonant cavity structure sleeved with each other, and the invention is characterized in that the dispersive compensator is composed of an input waveguide (1), a coupling waveguide (2), an output waveguide (3), a fixed annular waveguide (4) and an adjustable annular waveguide (5). The adjustable annular waveguide is characterized in that two annular waveguides which are sleeved with each other are arranged in the same plane, and are arranged adjacently. The distance between the two waveguides is no more than one wavelength. The waveguide is made of material with refractive index can be adjusted. Each part of waveguide in a filter structure is single-mode waveguide, and the refractive index of the adjustable annular waveguide can be adjusted through changing the exterior condition of the adjustable annular waveguide, thereby the dispersive compensating range is adjusted. When the resonant frequency of the adjustable annular waveguide is similar with that of the fixed annular waveguide, so the resonance of the two waveguides is realized, and the dispersive compensating range of the dispersive compensator is greatly improved. The invention has the advantages of simple realization, convenient operation, easy integration and large range of dispersive compensating range. The invention can be applied to optical communicating system.

Description

Technical field [0001] The invention relates to the field of optical information technology, in particular to a method for designing and implementing a dispersion compensator with integrated planar waveguide and high compensation range, which can be used as a dispersion compensation device in an optical communication system. Background technique [0002] When the optical signal is transmitted in the optical fiber, it is propagated by a group of independent beams or rays. Different beams are transmitted inside the optical fiber at different transmission angles. This different beam is called the mode of the optical fiber. Many modes can exist in a fiber, or only one mode can exist, which are called multimode fiber and single mode fiber respectively. Optical signals of different modes and optical signals of different wavelengths in the same mode have different propagation speeds when transmitted in the optical fiber, so the time to reach the receiving end is different, which ca...

AI Technical Summary

Problems solved by technology

[0016] The invention provides an adjustable optical dispersion compensator with a large dispersion compensation range, which solves the problem of realizing the tunability of the compensation range of the dispersion compensator, improves the dispersion compensation range as much as possible, and solves the practical problem of the dispersion compensator Difficult problems in processing

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