Low Noise Single Photon Detection System with InGaAs/InP APD Integrated TEC Device and Analog Integrator Readout Scheme
- Low Noise Single Photon Detection System with InGaAs/InP APD Integrated TEC Device and Analog Integrator Readout Scheme
- 이민수; 한상욱; 문성욱
- APD; 단일광자; 검출기; QKD 시스템
- Issue Date
- InGaAs/InP avalanche photodiode(APD) is widely
used in quantum key distribution(QKD) for single
photon detection. The APD mainly suffers from
After-pulse and dark current noise. We have
implemented a compact APD module that thermoelectric
control device is integrated for lower dark current noise.
In addition, a new readout scheme using analog
integrator circuit developed for reducing After-pulse
noise. Measurement result shows 1.48 % After pulse
noise compared to conventional scheme of 11 % at 15.64
% quantum efficiency.
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