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Photon-number modes
A: A two-dimensional histogram of the time difference between the trigger of a pulsed laser and the rising and falling edges of electrical pulses generated from detection events. The histogram shows well-distinguishable modes that can be related to the photon numbers. We verify this by correctly predicting the photon number statistics of various µ (see main text). B: Projections of the histogram to the rising edge (blue) and for optimal mode distinction (red, along mode separation boundaries in Fig. 1 A). Also considering the falling edge results in substantially better distinguishability of photon-number modes (Sauer et al., arXiv:2310.12472v1 [quant-ph] (2023)).
Characterization of SNSPD by PNR Detection
Fraunhofer IOF
Qu-Test
We provide a specialized service for the characterization and calibration of Superconducting Nanowire Single-Photon Detector (SNSPD) systems to evaluate their quantum efficiency. By employing photon-number-resolving detection techniques, we precisely measure the detector's response to varying photon numbers, enabling a detailed assessment of its performance. This method allows us to calibrate the SNSPD system accurately, ensuring optimal sensitivity and reliability in photon detection independent of the coupling losses. Our service is essential for applications requiring high-fidelity single-photon detection, such as quantum communication, quantum computing, and advanced photonic research. By leveraging photon-number-resolving capabilities, we help optimize your SNSPD systems for peak operational efficiency and accuracy. Specifications: • Typical wavelength ranges: telecom C-band. • Testing and benchmarking of superconducting nanowire detector performances.
QuTest WP4 - 5 IOF
Sensing Communication
Photonics  Superconducting 
Testing  Measurements
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