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Proceedings Paper

Distance scale calibration of optical fiber OTDR
Author(s): Yuwen Fang; Jin Qian; Minming Wang; Xuesong Li; Tianchu Li
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Paper Abstract

In this paper we present the distance scale calibration of optical fiber Optical Time Domain Reflectometers (OTDR) using the optical time-delay recirculating line approach. Particularly we demonstrate the optical modulation - phase-shift technique to measure the length of the standard fiber which formed the loop of the delay line. Two stages of modulations of 10 KHz and 1 MHz were used to achieve, step-by-step, the final optical length uncertainty of less than 0.02m+1.20 X 10-6. The length measurement results were self-checked and they are well within the quoted uncertainty. With the calibrated delay recirculating-line as a transfer standard the distance scale of the OTDRs is verified to the uncertainty of about 2 x 10-5, depending on the OTDRs’ performance.

Paper Details

Date Published: 6 August 1998
PDF: 6 pages
Proc. SPIE 3552, Fiber Optic Components and Optical Communication II, (6 August 1998); doi: 10.1117/12.318004
Show Author Affiliations
Yuwen Fang, National Institute of Metrology (China)
Jin Qian, National Institute of Metrology (China)
Minming Wang, National Institute of Metrology (China)
Xuesong Li, National Institute of Metrology (China)
Tianchu Li, National Institute of Metrology (China)


Published in SPIE Proceedings Vol. 3552:
Fiber Optic Components and Optical Communication II
Shuisheng Jian; Franklin F. Tong; Reinhard Maerz, Editor(s)

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