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Proceedings Paper

Balanced InGaAs/InP avalanche photodiodes for single photon detection
Author(s): Zhiwen Lu; Wenlu Sun; Xiaoguang Zheng; Joe Campbell; Xudong Jiang; Mark A. Itzler
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Paper Abstract

Abstract—We demonstrate a sinusoidally-gated InGaAs/InP photodiode pair operated at wavelength of 1310 nm with high photon detection efficiency (PDE) and low dark count rate (DCR). The photodiode pair is biased in a balanced scenario so that the common component of the output signal is cancelled. The concept of balanced photodiodes helps improve detection efficiency while canceling the common mode signal, which, in this case, is the capacitive response of the photodiodes. In conventional sinusoidal gating, an extra component, – an RF filter (or several) at the gating frequency, is utilized to filter out the gating signal and leave the avalanche signal for detection. For this configuration, sinusoidally-gated counting systems are restricted to a single frequency. With the balanced single photon diodes (SPAD), sinusoidal gating within a continuous frequency range is feasible. A printed circuit with symmetric layout of two bias tees was fabricated on a duroid board to enable the application of AC and DC signals for the dual SPADs. At a laser repletion rate of 1 MHz and temperature of 240 K the DCR and PDE were 58 kHz and 43%, respectively. Afterpulsing probability was lower compared with a sinusoidually-gated single SPAD. Jitter of 240 ps was achieved with 1 photon per pulse for an excess bias of 1.6%.

Paper Details

Date Published: 10 October 2012
PDF: 7 pages
Proc. SPIE 8460, Biosensing and Nanomedicine V, 84601H (10 October 2012); doi: 10.1117/12.2000154
Show Author Affiliations
Zhiwen Lu, Univ. of Virginia (United States)
Wenlu Sun, Univ. of Virginia (United States)
Xiaoguang Zheng, Univ. of Virginia (United States)
Joe Campbell, Univ. of Virginia (United States)
Xudong Jiang, Princeton Lightwave, Inc. (United States)
Mark A. Itzler, Princeton Lightwave, Inc. (United States)

Published in SPIE Proceedings Vol. 8460:
Biosensing and Nanomedicine V
Hooman Mohseni; Massoud H. Agahi; Manijeh Razeghi, Editor(s)

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