Realization of high interference visibility based on silica-on-silicon planar lightwave circuit
Author(s): You, J (You, Jin); Wang, Y (Wang, Yue); Li, SY (Li, Shaoyang); An, JM (An, Junming); Han, Q (Han, Qin)
Source: OPTICAL ENGINEERING Volume: 60 Issue: 12 Article Number: 125105 DOI: 10.1117/1.OE.60.12.125105 Published: DEC 2021
Abstract: Quantum key distribution can realize unconditional security of communication. Here, a quantum decoding chip based on silica-on-silicon planar lightwave circuit (PLC) platform, which is compatible for multiprotocol has been demonstrated. PLC technology provides stability, high integration, and practicality for the chip, whereas silica-on-silicon material makes it low loss and low cost. The chip is integrated with three variable optical splitters, two asymmetric Mach-Zehnder interferometers, and four variable directional couplers. The interference visibility is investigated by self-interfering method, and the results showed it is high to 98.2% under temperature control. The extinction ratio for the phase states is kept between 23 and 25 dB for 6 h without active phase correction. (C) 2021 Society of Photo-Optical Instrumentation Engineers (SPIE)
Accession Number: WOS:000768038300030
ISSN: 0091-3286
eISSN: 1560-2303
