Mach-Zehnder optical switch structure based on coupling of double resonant cavities

Abstract

A Mach-Zehnder optical switch structure based on coupling of double resonant cavities comprises a pair of input waveguides, a front coupler, a rear coupler, a pair of output waveguides and a pair of optical resonant cavities, wherein the input end of the front coupler is connected with the input waveguides and is used for dividing a path of light into two paths of light, and the two paths of light enter an upper interference arm and a lower interference arm respectively; the rear coupler combines the two paths of light into one path of light to be coupled into a certain optical waveguide of the input waveguides; one end of each output waveguide is connected with the output end of the rear coupler; the two ends of the upper interference arm and the two ends of the lower interference arm are connected with the front coupler and the rear coupler respectively; the optical resonant cavities are coupled with the upper interference arm and the lower interference arm respectively. According to the Mach-Zehnder optical switch structure, the advantage of drastic phase changes of wave lengths near resonance points is utilized, the two-arm interference characteristic of the Mach-Zehnder interference structure is combined, the refractive index of one resonant cavity only needs to be changed, and light signals are output from different ports.

Description

technical field [0001] The invention relates to a Mach-Zehnder optical switch structure based on double resonant cavity coupling, belonging to the field of integrated optoelectronics. Background technique [0002] Due to its advantages of small size and low power consumption, integrated optoelectronic technology has become a research hotspot in recent years. Discrete components such as modulators, filters, and lasers have developed rapidly; the monolithic integration of multiple functional devices has also been continuously developed, and the monolithic integration level and data communication volume are also increasing rapidly. Integrated optoelectronic devices will become the basis and driving force for the continuous development of future all-optical networks and on-chip optical interconnections. As one of the important devices, the optical switch is widely used in optical forking and multiplexing systems and optical cross nodes in optical networks; it is used in data co...

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Problems solved by technology

[0004] Comprehensively comparing the reported methods, the optical switch based on the Mach-Zehnder interference structure has the widest spectral bandwidth, but the device size is large, and the phase difference of π needs to be adjusted during the switching operation, and the power consumption is large

The optical switch based on a single microring or microdisk structure has a small device size, but due to the narrow spectral bandwidth of a single resonant structure, the spectral response is not flat, and increasing the bandwidth will increase the power consumption

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