A Distributed Acoustic Sensor with a 120-km Sensing Range Based on a Phase-Sensitive Optical Time-Domain Reflectometer and a Remotely Pumped Erbium-Doped Fiber Amplifier
A. S. Dudin, D. R. Kharasov, E. A. Fomiryakov, S. P. Nikitin, O. E. Nanii, V. N. Treshchikov
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Abstract
The operating range of a distributed acoustic sensor based on a phase-sensitive optical time-domain reflectometer has been increased using an erbium-doped fiber amplifier with remote forward pumping. It is shown that by incorporating a single segment of erbium-doped fiber at a distance of 70 km and pumping it from the front end by a 500-mW laser at a wavelength of 1480 nm over the sensing fiber, it is possible to increase the operating range of the reflectometer by 45 km and, thereby, obtain the total operating range as large as 120 km along a standard single-mode fiber.
期刊介绍：
Instruments and Experimental Techniques is an international peer reviewed journal that publishes reviews describing advanced methods for physical measurements and techniques and original articles that present techniques for physical measurements, principles of operation, design, methods of application, and analysis of the operation of physical instruments used in all fields of experimental physics and when conducting measurements using physical methods and instruments in astronomy, natural sciences, chemistry, biology, medicine, and ecology.
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