13 May 2015 Low noise InGaAs/InP single-photon negative feedback avalanche diodes: characterization and applications
Author Affiliations +
In recent years, many applications have been proposed that require detection of light signals in the near-infrared range with single-photon sensitivity and time resolution down to few hundreds of picoseconds. InGaAs/InP singlephoton avalanche diodes (SPADs) are a viable choice for these tasks thanks to their compactness and ease-of-use. Unfortunately, their performance is traditionally limited by high dark count rates (DCRs) and afterpulsing effects. However, a recent demonstration of negative feedback avalanche diodes (NFADs), operating in the free-running regime, achieved a DCR down to 1 cps at 10 % photon detection efficiency (PDE) at telecom wavelengths. Here we present our recent results on the characterization of NFAD detectors for temperatures down to approximately 150 K. A FPGA controlled test-bench facilitates the acquisition of all the parameters of interest like PDE, DCR, afterpulsing probability etc. We also demonstrate the performance of the detector in different applications: In particular, with low-temperature NFADs, we achieved high secret key rates with quantum key distribution over fiber links between 100-300 km. But low noise InGaAs/InP SPADs will certainly find applications in yet unexplored fields like photodynamic therapy, near infrared diffuse optical spectroscopy and many more. For example with a large area detector, we made time-resolved measurements of singlet-oxygen luminescence from a standard Rose Bengal dye in aqueous solution.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gianluca Boso, Gianluca Boso, Boris Korzh, Boris Korzh, Tommaso Lunghi, Tommaso Lunghi, Hugo Zbinden, Hugo Zbinden, "Low noise InGaAs/InP single-photon negative feedback avalanche diodes: characterization and applications", Proc. SPIE 9492, Advanced Photon Counting Techniques IX, 94920Q (13 May 2015); doi: 10.1117/12.2177892; https://doi.org/10.1117/12.2177892


Back to Top