A coupled double-ring resonator and fast and slow light adjustment method
A double-loop resonance, fast and slow technology, applied in the field of optical communication, can solve the problems of resonance wavelength shift, complex operation, small tolerance, etc., and achieve the effect of increasing tolerance and simplifying experimental operation
Active Publication Date: 2022-07-19
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
[0004] Aiming at the defects of related technologies, the purpose of the present invention is to provide a coupled double-ring resonator and a fast-slow light adjustment method, aiming to solve the problems of complex operation, small tolerance and shifting resonance wavelength in the existing fast-slow light adjustment
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[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0025] The invention provides a coupled double-ring resonator and a method for adjusting fast and slow light. The coupled double-ring resonator includes two micro-ring resonators and two straight waveguides. The waveguide and microring materials can be silicon-on-insulator, lithium niobate, silicon nitride, indium phosphide or gallium arsenide, etc., and are not limited to specific materials. The t...
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The invention discloses a coupled double-ring resonator and a fast and slow light adjustment method, belonging to the field of optical communication. The coupled double-ring resonator includes two micro-ring resonators and two straight waveguides. The two microring resonators are coupled to each other, and the two straight waveguides are coupled to the same first microring and are not coupled to the second microring. The invention enables the input light to manipulate the resonant mode in another resonant cavity by changing the refractive index of one resonant cavity when the input light is transmitted in the system, so that the phase and the group velocity are changed, thereby realizing the continuous adjustment of fast and slow light. At the same time, the resonant wavelength of the light in the second microring remains unchanged, and the optical bandwidth of the resonant mode is broadened or compressed. The resonant wavelength of the first microring is shifted by adjusting the refractive index, so that the coupling between the two microrings is increased or decreased, the change of the optical path does not need to be strictly controlled, and the tolerance is increased.
Description
technical field [0001] The invention belongs to the field of optical communication, and more particularly, relates to a coupled double-ring resonator and a method for adjusting fast and slow light. Background technique [0002] Micro-ring resonators are composed of micro-ring waveguides and straight waveguides, and have been widely used in on-chip optical communication and information processing, such as filtering, modulation, optical delay, and optical buffering. Achieving continuous tuning of fast and slow light in a microring resonator is the basis for realizing optical caching in integrated devices. Controlling the speed of light in dispersive materials and dispersive structures to achieve continuous tunability of fast and slow light has been extensively studied. [0003] At present, the main methods to realize fast and slow light in the microring resonator are by changing the coupling distance between the input waveguide and the resonator, changing the polarization cha...
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IPC IPC(8): G02B6/293
CPCG02B6/29338
Inventor 张颖黄庆忠刘强
Owner HUAZHONG UNIV OF SCI & TECH