Device of optical passive repeater used in optical multimode communication

摘要

An optical passive repeater is provided. The repeater is operated under a state of polariton Bose-Einstein condensation (BEC). A phase transition from a thermal polariton state to a condensed polariton state is controlled, where system temperatures and densities are lower than thermal dissociation temperatures and nonlinear saturation densities, respectively. Original input multimode laser signals are transformed into final output single-mode laser signals. Thus, the polariton BEC passive repeater becomes a power-efficient and low-cost device to increase the reach of optical links without sacrificing its signal quality and integrity.

主权项

1. A device of optical passive repeater used in optical multimode communication, comprising
a vertical cavity surface emitting laser (VCSEL),
wherein said VCSEL generates multimode laser signals and said multimode laser signals enter into a first multimode fiber; a polariton Bose-Einstein condensation (BEC) passive repeater, said polariton BEC passive repeater being connected to said VCSEL through said first multimode fiber,
wherein said polariton BEC passive repeater converts said multimode laser signals into single-mode laser signals and said single-mode laser signals enter into a second multimode fiber; and a photodetector (PD), said PD being connected to said polariton BEC passive repeater through said second multimode fiber,
wherein said PD senses said final laser signals; wherein said polariton BEC passive repeater has a microcavity structure and said microcavity structure comprises a substrate; and a polariton cavity, said polariton cavity having a p-n junction, said polariton cavity comprising a first Bragg reflector, said first Bragg reflector being located on said substrate, said first Bragg reflector having a plurality of alternating coatings; a half-wavelength cavity, said half-wavelength cavity being located on said first Bragg reflector; a second Bragg reflector, said second Bragg reflector being located on said half-wavelength cavity, said second Bragg reflector having a plurality of alternating coatings; and a quantum well part, said quantum well part having multiple quantum wells, said quantum wells being distributed in said first Bragg reflector, said half-wavelength cavity and said second Bragg reflector; and wherein said multimode laser signals are inputted to said microcavity structure at an oblique angle; said multimode laser signals are converted into said single-mode laser signals after passing through said polariton cavity; and said single-mode laser signals are outputted at a nearly vertical angle.