Multimode Fiber Coupled Superconductor Nanowire Single-Photon Detector
Open Access
- 25 September 2014
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Journal
- Vol. 6 (5), 1-8
- https://doi.org/10.1109/jphot.2014.2360285
Abstract
High-performance superconductor nanowire single-photon detectors (SNSPDs) coupled by 50-μm multimode fiber were designed and fabricated for the purpose of space applications. Microlens coupling between multimode fiber and detector chip was proposed, resulting in coupling efficiency of 86% at the chips with detection area of 15 x 15 μm 2 . An optical structure for enhancing the photons absorption and superconductor nanowires with low critical current of 3 μA were fabricated on the chips. A cryogenic amplifier was adopted to increase the signal-to-noise ratio and time jitter of output pulse. The SNSPD exhibited system efficiency (1550 nm) of 56% at a dark count rate of 100 cps, 50% at a dark count rate of 5 cps, and 40% at a dark count rate of 1 cps. The time jitter was 46 ps at full-width at half-maximum. The multimode fiber coupling system with high performance will promote its applications in free space.Keywords
Funding Information
- National Natural Science Foundation of China (61101012)
- National Basic Research Program of China (2011CBA00202)
- National Key Scientific Instrument and Equipment Development Projects (11227904)
This publication has 34 references indexed in Scilit:
- A multi-functional superconductor single-photon detector at telecommunication wavelengthApplied Physics B Laser and Optics, 2014
- Jitter analysis of a superconducting nanowire single photon detectorAIP Advances, 2013
- High performance fiber-coupled NbTiN superconducting nanowire single photon detectors with Gifford-McMahon cryocoolerOptics Express, 2013
- Intrinsic timing jitter of superconducting nanowire single-photon detectorsApplied Physics B Laser and Optics, 2011
- Spectral sensitivity of narrow strip NbN superconducting single-photon detectorPublished by SPIE-Intl Soc Optical Eng ,2011
- Vortex-based single-photon response in nanostructured superconducting detectorsPhysica C: Superconductivity and its Applications, 2008
- Spectroscopy With Nanostructured Superconducting Single Photon DetectorsIEEE Journal of Selected Topics in Quantum Electronics, 2007
- Fiber-coupled NbN superconducting single-photon detectors for quantum correlation measurementsPublished by SPIE-Intl Soc Optical Eng ,2007
- Quantum key distribution at 1550nm with twin superconducting single-photon detectorsApplied Physics Letters, 2006
- Kinetic-inductance-limited reset time of superconducting nanowire photon countersApplied Physics Letters, 2006