Slow light adjustable time delayer for wideband signal based on coupling cavity and vertical cavity surface emitting laser

Abstract

The invention discloses a slow light adjustable time delayer for a wideband signal based on a coupling cavity and vertical cavity surface emitting laser. The method adopted by the invention is realized in such a way that a coupling cavity formed by coupling an edge cavity and an edgeless cavity is constructed by changing a structure of a DBR (Distributed Bragg Reflector) at one side of the coupling cavity and vertical cavity surface emitting laser (CC-VCSEL) and can be used for effectively broadening delay bandwidth of the device. According to the technical scheme of the invention, the slow light time delay of the wideband signal can be effectively adjusted by adjusting bias current of the CC-VCSEL and the light power or wavelength of an input signal. The slow light adjustable time delayer disclosed by the invention has the advantages of work under the condition of room temperature, simpleness in operation, easiness in integration and the like.

Description

technical field [0001] The invention relates to the technical fields of optical buffering, optical sensing, image processing and the like in an all-optical packet switching network, and in particular to the field of broadband signal slow-light adjustable delayers in optical fiber communication systems. Background technique [0002] Today, human production and life are constantly moving towards digitization and informatization, and it is urgent to realize accurate, high-speed, and large-capacity information storage and transmission. Traditional communication technology is increasingly unable to meet people's needs, and all-optical storage and transmission of information has gradually become a hot spot of concern today. [0003] At present, in the field of optical storage, information storage can be realized by controlling the buffer length and group velocity of optical pulses. According to these two methods, people are gradually exploring solutions to realize all-optical sto...

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Problems solved by technology

This phenomenon reflects that the delay spectrum line of VCSEL has a sharper peak and a narrower bandwidth. The reason for this phenomenon is that the delay bandwidth is limited by the line of the F-P cavity due to the resonant cavity formed by the high reflectivity DBR. Wide, this spectral characteristic is very easy to cause distortion of the transmission signal, which greatly limits the slow optical delay of the bandwidth signal in the VCSEL, and then affects the development of the VCSEL as an optical memory

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