Silica-based planar lightwave circuit(PLC)devices can reduce transmission loss and cost in a quantum key distribution(QKD)system,and have potential applications in integration and production.A PLC-based quantum decodi...Silica-based planar lightwave circuit(PLC)devices can reduce transmission loss and cost in a quantum key distribution(QKD)system,and have potential applications in integration and production.A PLC-based quantum decoding integrated chip for multi-protocols is designed and fabricated,which is composed of variable optical splitters(VOSs),asymmetric Mach-Zehnder interferometers(AMZIs),and variable directional couplers(VDCs).Balanced pulse-pairs of four outputs are obtained simultaneously with measured delay times of 405 ps and 402 ps,respectively.The chip has advantages in achieving high interference visibility and low quantum bit error rate(QBER).展开更多
A 16-channel variable attenuator multiplexer/demultiplexer （VMUX） device is demonstrated. The VM UX is based on a rib-type structure on a silicon-on-insulator （SOI） platform. It consists of a 100-GHz arrayed waveg...A 16-channel variable attenuator multiplexer/demultiplexer （VMUX） device is demonstrated. The VM UX is based on a rib-type structure on a silicon-on-insulator （SOI） platform. It consists of a 100-GHz arrayed waveguide grating （AWG） and an electro-optic variable optical attenuator （VOA） array with a p-i-n lateral diode structure. The insertion loss of the demonstrated device is about 9.1 dB and the corresponding crosstalk is about 10 dB. The injected current of the VOA is 60.74 mA at 20 dB attenuation and the whole area of the device is 2.9 × 1 mm2. The VMUX performs an excellent function of wavelength demultiplexing and optical power balancing in 16 channels.展开更多
基金Project supported by the National Key Research and Development Program of China(Grant No.2018YFA0306403)the National Nature Science Foundation of China(Grant No.61805232).
文摘Silica-based planar lightwave circuit(PLC)devices can reduce transmission loss and cost in a quantum key distribution(QKD)system,and have potential applications in integration and production.A PLC-based quantum decoding integrated chip for multi-protocols is designed and fabricated,which is composed of variable optical splitters(VOSs),asymmetric Mach-Zehnder interferometers(AMZIs),and variable directional couplers(VDCs).Balanced pulse-pairs of four outputs are obtained simultaneously with measured delay times of 405 ps and 402 ps,respectively.The chip has advantages in achieving high interference visibility and low quantum bit error rate(QBER).
基金supported by the National High Technology Research and Development Program of China(No.2013AA031402)
文摘A 16-channel variable attenuator multiplexer/demultiplexer （VMUX） device is demonstrated. The VM UX is based on a rib-type structure on a silicon-on-insulator （SOI） platform. It consists of a 100-GHz arrayed waveguide grating （AWG） and an electro-optic variable optical attenuator （VOA） array with a p-i-n lateral diode structure. The insertion loss of the demonstrated device is about 9.1 dB and the corresponding crosstalk is about 10 dB. The injected current of the VOA is 60.74 mA at 20 dB attenuation and the whole area of the device is 2.9 × 1 mm2. The VMUX performs an excellent function of wavelength demultiplexing and optical power balancing in 16 channels.
