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  • Wei Jiang

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Project Title2012-005 Parallel-coupled Dual Racetrack Silicon Micro-resonators for Quadrature Amplitude Modulation
Track Code2012-005
Websitehttp://otc.rutgers.edu/
Short Description

A Rutgers electrical engineering professor specializing in photonic devices has developed a novel silicon device design; a parallel-coupled dual racetrack micro-resonator structure for phase-shift keying and M-ary quadrature amplitude modulation (QAM).

Abstract

A Rutgers electrical engineering professor specializing in photonic devices has developed a novel silicon device design; a parallel-coupled dual racetrack micro-resonator structure for phase-shift keying and M-ary quadrature amplitude modulation (QAM). The modulator configuration comprises two identical racetrack resonators that are symmetrically side-coupled in parallel to a through waveguide in the center. The modulator can be fabricated on a silicon-on-insulator (SOI) wafer. The carriers can be injected or depleted from the racetrack resonators using a pin diode or metal-oxidesemi conductor capacitor embedded in a silicon waveguide. The plasma dispersion effect of the injected carriers causes a change of refractive index, Δn1, Δn3, in each racetrack resonator, which modifies the cross-coupled resonances of the two racetrack resonators. By carefully choosing the voltage signals applied to each resonator, the amplitude and phase of output optical signal can be controlled to generate arbitrary M-ary quadrature signals. A distinctive feature of the proposed structure is that the coherent cross-coupling between the two racetrack resonators mediated by the center waveguide drastically modifies the amplitude/phase characteristics of resonance. This enables M-ary quadrature signal generations including quadrature phase shift keying (QPSK).

 
Tagsfiber optic communications
 
Posted DateJun 11, 2012 1:14 PM

Researcher

Name
Wei Jiang

Manager

Name
Rick Smith

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