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超導納米線單光子探測器（SNSPD）利用超導材料對紅外光子的響應，產生輸出電壓脈沖的特點，進行紅外弱光信號的探測。響應波段覆蓋780nm至1600nm，具有高的探測效率和極低的暗噪聲。IDQ提供的超導納米線單光子探測器系統包括控制電子學，制冷單元及相關軟件，提供“Turnkey”整體解決方案，可在量子光學、量子計算、激光雷達和激光通信等領域中應用。
主要指標：
Detectors | |
System detection efciency | ≥ 85% |
Optimisaton Wavelengths | from 780 to 1625 nm |
Broadbａnd detection efficiency | > 85% over min 100 nm |
Dark count rate (a,b) | 10 to 100 Hz |
Recovery Time (a,c) | from 30 to 60 ns |
Maximum detection rate (a) | 20 to 50 MHz |
Jitter (FWHM) (b) | 20 to 40 ps |
Output pulse width, voltage | > 5 ns, > 100 mV |
Design working temperature (d) | 0.8 K |
Detector package dimensions | 13 x 20 x 25 mm |
Fibre type (a) | Singlemode fbre |
Cryostat | |
Optical and coaxial channels | 1-8 (upon request) |
Base temperature | 0.8 K |
Minimum runtime at 0.8 K (e) | 24 to 100 hours, configurable |
Temperature stability | 0.005 K |
Cooldown time | 12 hours |
Compressor Type | Air or water-cooled |
Flexlines length | 3 m (upon request) |
Dimensions | - |
- Cryostat | 53 x 30 x 30 cm |
- Compressor (air-cooled) | 50 x 40 x 50 cm |
a. Wavelength dependant, call for details.
b: Lower values available upon request.
c: Time for the efficiency to recover 50% of the maximum efficiency after a detection.
d: The detectors can be operated at 2.5 K but the specifications are impacted. Call for details.
e: Programmed 2 hours of automatic recycling between runtime periods at 0.8K.
測試數據：
波長-探測效率-暗記數關系
低時間抖動和快速恢復特性
ID281 Superconducting nanowire system
