27 November 1996 Analysis of the optimum gain of the APD in DART
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The paper presents an analysis of the signal to noise ratio of distributed anti-Stokes ratio thermometry (DART) to quantify the effect of varying the gain of the avalanche photodiode (APD). An optimal gain is found based on maximizing the signal to noise ratio of the received circuit output. Good agreement between calculated and measured avalanche gain of APD is obtained.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hongzhi Zhao, Naiji Li, Dazun Zhao, "Analysis of the optimum gain of the APD in DART", Proc. SPIE 2838, Distributed and Multiplexed Fiber Optic Sensors VI, (27 November 1996); doi: 10.1117/12.259791; https://doi.org/10.1117/12.259791

Signal to noise ratio

Avalanche photodetectors

Interference (communication)

Optical amplifiers

Signal detection


Optical fibers

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