用于量子光子集成电路的光纤低损耗连接.pdf

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1、OCP Global Summit October 18,2023|San Jose,CAR.Ryan Vallance,Yang Chen,King-Fu HiiCudoForm DivisionSENKO Advanced CLow-Loss Connections to Optical Fibers for Quantum Photonic Integrated CircuitsQuantum Photonic Integrated Circuits(QPICs)for secure networks,quantum computing,and sensingQPICs pose man

2、y challenges for optical connectivity:Heterogenous platforms different foundries and CTEsSingle-photon detectors cryogenic-temperaturesBroadband(UV-VIS-IR)far outside telecom wavelengthsChallenging packaging requirements isolate from environmentState preservation polarization preservationHigh-coupli

3、ng efficiency low-loss fiber-optic connectionsIntegration for Quantum Information TechnologyRudolph.APL Photonics.2.030901.2017.From Moody et al 2022 J.Phys.Photonics 4 012501 Connecting to QPICs with grating couplersDiffraction gratings are composed of diffractive elements placed along the waveguid

4、e propagation direction.Fiber-to-chip coupling is achieved using a tapered waveguide region for horizontal mode size conversion and a grating coupler with a 10 m width(similar to the MFD of typical single-mode fiber).The grating elements diffract the optical beam out of the waveguide plane,and the d

5、iffracted optical beam couples into the optical fibers guided mode.GCs can convert from path entanglement(on the QPIC)to polarization entanglement(for propagation in fibers)Target MFD:Circular10mOriginal MFD:Elliptical2madiabatically tapered waveguide Grating couplerAdapted from:NanophotonicsWant et

6、 al.Optica.Vol 3,No.4,407-413(2016)Construction of metallic PIC connectorsChen et al.Proc Optical Interconnects XX,Photonics West,11286-46,2020.Design 1:Reimage fiber core onto grating couplerSM optical fiberglass cover platephotonic integrated circuitaspherical mirrorgrating coupler with SM MFD out