Single photon avalanche diode (SPAD) array quenching and a novel quantum random number generator (QRNG)
Pakalapati, Mano Rahul Kumar
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Single Photon Avalanche Diodes, SPADs is a single-photon sensitive light detector with capabilities of pico-second timing resolutions and offer potential for enhancing various fields of science to evolve into quantum-age. SPAD has applications ranging from quantum computing, cryptography (QKD) to applications in medicine such as neural imaging and Single Photon Emission Computed Tomography (SPECT). SPAD arrays are gaining popularity as they enable for parallel photon detection and 3D imaging. To account for the process tolerances and aging, each SPAD-pixel needs a tunable quenching circuit in the frontend for post-fabrication fine-tuning, this research work presents a novel Dual Triggered Tunable Active Quenching Circuit, (DTT-AQC). Furthermore, a novel Quantum Random Number Generator, QRNG based on SPADs quantum jitter is also presented. The random numbers from the conceived QRNG passed the Statistical Test Suite (STS) from National Institute of Standards (NIST), Dieharder test suite and the test results are reported.