Single-photon interference using silica-based AMZI with phase modulation

Ren, Meizhen; Xiao, Lin; Zhang, Jiashun; Wang, Liangliang; Wang, Yue; Wu, Yingliang; J, An

doi:10.1016/j.optlastec.2019.105837

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…It is worth noting that this silica part is different from that in Ref. [26], which is terminated with a DC at the output. We here remove the DC for the coupling with the LN chip.…”

Section: Design and Fabrication Of Hybrid Chipmentioning

confidence: 95%

“…The Alice section includes a pulse laser, a polarization controller, the hybrid chip, an off-chip LN intensity modulator, and an off-chip attenuator, in sequence. The Bob section 064212-3 includes SPDs and an silica AMZI chip, [26,27] with the identical temporal delay of Alice. Pulse pattern generator (PPG) provides the system clock to synchronize all the devices including pulse laser and SPDs.…”

Section: Encoding and Decoding Of Four Bb84 Statesmentioning

confidence: 99%

“…Third, the LN phase modulator is designed in a push-and-pull model in order to reach a higher EO modulation efficiency. With the aid of an extra off-chip LN intensity modulator and a passive silica decoder chip, [26] we demonstrate the preparation of four BB84 states and the corresponding states decoding.…”

Section: Introductionmentioning

confidence: 99%

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Quantum key distribution transmitter chip based on hybrid-integration of silica and lithium niobates

Li¹,

Wang²,

Zhang³

et al. 2022

Chinese Phys. B

Self Cite

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A quantum key distribution transmitter chip based on hybrid‐integration of silica planar light‐wave circuit (PLC) and lithium niobates (LN) modulator PLC is presented. The silica part consists of a tunable directional coupler and 400 ps delay line, and the LN part is made up of a Y‐branch, with electro‐optic modulators on both arms. The two parts are facet‐coupled to form an asymmetric Mach‐Zehnder interferometer. We have successfully encoded and decoded four BB84 states at 156.25 MHz repetition rate. Fast phase‐encoding of 0 or π has been achieved, with interference fringe visibilities 78.53% and 82.68% for state |+> and |‐>, respectively. With the aid of an extra off‐chip LN intensity modulator, two time‐bin states have been prepared and the extinction ratios are 18.65 dB and 15.46 dB for state |0> and |1>, respectively.

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“…It is worth noting that this silica part is different from that in Ref. [26], which is terminated with a DC at the output. We here remove the DC for the coupling with the LN chip.…”

Section: Design and Fabrication Of Hybrid Chipmentioning

confidence: 95%

Section: Encoding and Decoding Of Four Bb84 Statesmentioning

confidence: 99%

See 1 more Smart Citation

Quantum key distribution transmitter chip based on hybrid-integration of silica and lithium niobates

Li¹,

Wang²,

Zhang³

et al. 2022

Chinese Phys. B

Self Cite

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“…An asymmetric Mach–Zehnder interferometer (AMZI) was integrated on Si substrate, and its interference visibility was higher than 98%. As the technology developed, more components were fabricated on Si chips, and the interference visibilities of devices were gradually improved [ 58 , 63 , 64 , 65 , 74 ]. A new work reported a decoding chip, which was composed of two AMZIs, three variable optical beam splitters, and four variable directional couplers.…”

Section: Qkd Implementationmentioning

confidence: 99%

Advances in Chip-Based Quantum Key Distribution

Liu

Huang

et al. 2022

Entropy

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Quantum key distribution (QKD), guaranteed by the principles of quantum mechanics, is one of the most promising solutions for the future of secure communication. Integrated quantum photonics provides a stable, compact, and robust platform for the implementation of complex photonic circuits amenable to mass manufacture, and also allows for the generation, detection, and processing of quantum states of light at a growing system’s scale, functionality, and complexity. Integrated quantum photonics provides a compelling technology for the integration of QKD systems. In this review, we summarize the advances in integrated QKD systems, including integrated photon sources, detectors, and encoding and decoding components for QKD implements. Complete demonstrations of various QKD schemes based on integrated photonic chips are also discussed.

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