D. R. Kharasov, D. M. Bengalskii, M. Yu. Vyatkin, O. E. Nanii, E. A. Fomiryakov, S. P. Nikitin, S. M. Popov, Yu. K. Chamorovsky, V. N. Treshchikov, “Extending the operation range of a phase-sensitive optical time-domain reflectometer by using fibre with chirped Bragg gratings”, Kvantovaya Elektronika, 2020, Volume 50, Number 5,Pages <nobr>510

This article is cited in 14 papers

Fibre-optics and fibre-optic devices

Extending the operation range of a phase-sensitive optical time-domain reflectometer by using fibre with chirped Bragg gratings

D. R. Kharasov^ab, D. M. Bengalskii^ac, M. Yu. Vyatkin^d, O. E. Nanii^ac, E. A. Fomiryakov^ac, S. P. Nikitin^a, S. M. Popov^d, Yu. K. Chamorovsky^d, V. N. Treshchikov^a

^a "T8" LLC, Moscow
^b Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Moscow Region
^c Lomonosov Moscow State University
^d Kotelnikov Institute of Radioengineering and Electronics, Fryazino Branch, Russian Academy of Sciences

Abstract: A record long external-disturbance detection distance of 140 km without employing optical amplifiers in the fibre line is demonstrated by a phase-sensitive optical time-domain reflectometer (Φ-OTDR) using a fibre section with inscribed chirped fibre Bragg gratings (CFBGs). This solution provides simultaneous operation of Φ-OTDR with a standard single-mode fibre at a distance of up to 100 km and with a CFBG fibre section located from the fibre line input point by at least 140 km.

Keywords: distributed sensor, fibre-optic sensor, phase-sensitive optical reflectometer, coherent reflectometer, fibre Bragg gratings, chirped fibre Bragg gratings.

Received: 19.12.2019