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Single-photon Detection Based on the Optical Self-Balancing Technique

Author: JianZuo
Tutor: WuGuang
School: East China Normal University
Course: Optics
Keywords: Single-photon detection Avalanche photodiodes Light since the differential balance technology The number of photons can be resolved detection
CLC: O431.2
Type: Master's thesis
Year: 2011
Downloads: 114
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Abstract


With the rise of quantum information technology and the rapid development of ultra-sensitive spectroscopy , single photon detection technology as one of the key technologies to become countries photoelectron Schools focus on a topic . This article describes the InGaAs / imprison phosphorus avalanche photodiode (InGaAs / InP APD) near infrared single photon detection technology . InGaAs / InP APD dark noise is serious , especially after the pulse effect , limiting the work rate of the device in the Geiger mode , the impact of the single-photon detection performance . So , InGaAs / InP APD usually work in gated Geiger mode \Among them, how from gate pulse Rush noise extract weak avalanche signals has become a key technology of InGaAs / InP APD single-photon detector . We proposed and the light from the differential noise suppression technology , through a high-speed distributed feedback semiconductor laser diode (DFB) , from the InGaAs / InP APD electrical signal into an optical signal of 1550 nm , then the use of fiber-optic signal processing technology to achieve self- differential probe , and ultimately achieve a highly sensitive avalanche signal detection , and the completion of a near infrared single photon detection . Thanks to the precise regulation of light since the differential advantage , spikes effective noise suppression ( suppression ratio of 31dB), enabling the measurement of weak avalanche signals . On this basis , we have studied the characteristics subsaturating mode avalanche formation , and discovered before the avalanche current saturation , the avalanche current and the number of incident photons into a linear relationship that single InGaAs / InP APD having a resolution capability of the photon number . We analyzed the number of photons in the case of different gain distinguished characteristics , and on the time scale to study characteristics of photon number resolution detectors . In addition, we have developed a distinguished array of photon number based on the multi-pixel silicon avalanche photodiode (Si APD) detectors (MPPC) , and the use of MPPC true random number generator based on the photon number of the random nature of quantum .

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CLC: > Mathematical sciences and chemical > Physics > Optics > The light nature of the theory > Quantum optics
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