6 August 1998 Distance scale calibration of optical fiber OTDR
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Proceedings Volume 3552, Fiber Optic Components and Optical Communication II; (1998); doi: 10.1117/12.318004
Event: Photonics China '98, 1998, Beijing, China
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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yuwen Fang, Jin Qian, Minming Wang, Xuesong Li, Tianchu Li, "Distance scale calibration of optical fiber OTDR", Proc. SPIE 3552, Fiber Optic Components and Optical Communication II, (6 August 1998); doi: 10.1117/12.318004; https://doi.org/10.1117/12.318004
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KEYWORDS
Calibration

Modulation

Optical fibers

Phase shifts

Phase measurement

Optical calibration

Metrology

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