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Photon Counting Optical Time Domain Reflectometry Applying a Single Photon Modulation Technique |
| WANG Xiao-Bo, WANG Jing-Jing, HE Bo, XIAO Lian-Tuan**, JIA Suo-Tang
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State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006
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| Cite this article: |
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WANG Xiao-Bo, WANG Jing-Jing, HE Bo et al 2011 Chin. Phys. Lett. 28 070302 |
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Abstract Photon-counting optical time domain reflectometry (v-OTDR) is typically used in a mode with spatial resolution in the centimeter range. Here we demonstrate a 1550 nm v-OTDR system to optimize the discriminate voltage of a single photon avalanche detector using a single photon modulation and demodulation technique, which shows obvious improvement in the signal intensity. The intensity of signal is doubled when the discriminator voltage is optimized from 184 mV to 162 mV.
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| Keywords:
03.67.Dd
03.67.Hk
42.81.Wg
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Received: 11 March 2011
Published: 29 June 2011
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| PACS: |
03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Hk
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(Quantum communication)
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42.81.Wg
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(Other fiber-optical devices)
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