Faculty of Physics
M.V.Lomonosov Moscow State University
Regular Article

# The Maximum Operating Range of a Distributed Sensor Based on a Phase-Sensitive Optical Time-Domain Reflectometer Utilizing Telecommunication Fiber with Reflective Centers

## D. R. Kharasov$^{1,2}$, D. M. Bengalskii$^{1,3}$, E. A. Fomiryakov$^{1,3}$, O. E. Nanii$^{1,2,3}$, M. A. Bukharin$^1$, S. P. Nikitin$^1$, V. N. Treshchikov$^1$

### Moscow University Physics Bulletin 2021. N 3.

• Article
Annotation

An optimal arrangement of point reflectors inscribed by femtosecond laser pulses in a standard telecommunication fiber is found, which provides the maximum operating range of distributed sensors based on phase-sensitive optical time-domain reflectometers (φOTDRs). It is shown that the operating distance of an φOTDR utilizing probe pulses with a duration of 200 ns can be increased by 53 km using ultra-low-loss fiber with an attenuation of 0.16 dB/km, thereby extending it to 173 km without using distributed, remotely pumped, or in-line amplifiers. When using the most widespread standard telecom fiber with an attenuation of 0.185 dB/km, the operating distance can be increased by 48 km (up to 152 km total).

Approved: 2021 September 22
PACS:
42.81.Pa Sensors, gyros
42.62.Cf Industrial applications
Rissian citation:
Д. Р. Харасов, Д. М. Бенгальский, Э. А. Фомиряков, О. Е. Наний, М. А. Бухарин, С. П. Никитин, В. Н. Трещиков.
Вестн. Моск. ун-та. Сер. 3. Физ. Астрон. 2021. № 3. С. 36.
Authors
D. R. Kharasov$^{1,2}$, D. M. Bengalskii$^{1,3}$, E. A. Fomiryakov$^{1,3}$, O. E. Nanii$^{1,2,3}$, M. A. Bukharin$^1$, S. P. Nikitin$^1$, V. N. Treshchikov$^1$
$^1$Т8 Sensor Ltd
$^2$Phystech School of Radio Engineering and Computer Technology, Moscow Institute of Physics and Technology
$^3$Physics Department, M.V. Lomonosov Moscow State University, chair of Optics, Spectroscopy and Nanosystems.

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