RT info:eu-repo/semantics/article
T1 Phase-sensitive OTDR probe pulse shapes robust against modulation-instability fading
A1 Fernández Ruiz, María del Rosario
A1 Fidalgo Martins, Hugo
A1 Pastor Graells, Juan
A1 Martín López, Sonia
A1 González Herráez, Miguel
K1 Fiber optics sensors
K1 Optical time domain reflectometry
K1 Scattering
K1 Rayleigh
K1 Pulse shaping
K1 Nonlinear optics
K1 Fibers
K1 Ciencias tecnológicas
K1 Electrónica
K1 Electronics
AB Typical phase-sensitive optical time-domain reflectometry (ϕOTDR) schemes rely on the use of coherent rectangular-shaped probe pulses. In these systems, there is a trade-off between the signal-to-noise ratio (SNR), spatial resolution, and operating range of the ϕOTDR system. To increase any of these parameters, an increase in the pulse peak power is usually indispensable. However, as it is well known, there is a limit in the allowable increase in probe power due to the onset of undesired nonlinear effects such as modulation instability. In this Letter, we perform an analysis of the effect of the probe pulse shape on the visibility fading due to modulation instability. In particular, four different temporal profiles are chosen: rectangular, Gaussian, triangular, and super-Gaussian (order 2). Our numerical and experimental analyses reveal that the use of triangular or Gaussian-like pulses can significantly inhibit the visibility fading issues. As such, an increase in the range up to twofold for the same pulse energy (i.e., SNR) and nominal spatial resolution can be achieved, as compared with the results obtained when using rectangular pulses. This is due to a more robust behavior of the Gaussian and triangular pulses against the Fermi–Pasta–Ulam recurrence occurring in modulation instability.
PB Optical Society of America
SN 0146-9592/16/245756-04
YR 2016
FD 2016-12-12
LK http://hdl.handle.net/10017/28157
UL http://hdl.handle.net/10017/28157
LA eng
NO Comunidad de Madrid
DS MINDS@UW
RD 02-jun-2023