Patent ID: 9287980
Filing Date: 2016-03-15
CPC Classification: H04B,H04J

Claim Text:
1. A device of optical passive repeater used in optical multimode communication, comprising a vertical cavity surface emitting laser (VCSEL), a polariton Bose-Einstein condensation (BEC) passive repeater, said polariton BEC passive repeater being connected to said VCSEL through said first multimode fiber, a photodetector (PD), said PD being connected to said polariton BEC passive repeater through said second multimode fiber, 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.