Journal ArticleDOI
Trade-off between the spatial and the frequency resolutions in measuring the power spectrum of the Brillouin backscattered light in an optical fiber
Hiroshi Naruse,Mitsuhiro Tateda +1 more
Reads0
Chats0
TLDR
Through this analysis, it is determined numerically that the bandwidth of the Brillouin backscattered light becomes wider, and thus the measurement accuracy in determining the peak-power frequency degrades in approximately inverse proportion to the launched pulse width.Abstract:
We theoretically analyze the relation between the pulse width of light launched into an optical fiber and the resultant power spectrum of spontaneous Brillouin backscattered light. Through this analysis, we determine numerically that the bandwidth of the Brillouin backscattered light becomes wider, and thus the measurement accuracy in determining the peak-power frequency degrades in approximately inverse proportion to the launched pulse width. Experimental results with various pulse widths are in good agreement with the derived theoretical results.read more
Citations
More filters
Journal ArticleDOI
Recent progress in Brillouin scattering based fiber sensors.
Xiaoyi Bao,Liang Chen +1 more
TL;DR: The progress on improving sensing performance parameters like spatial resolution, sensing length limitation and simultaneous temperature and strain measurement is reviewed.
Journal ArticleDOI
2 cm spatial-resolution and 2 km range Brillouin optical fiber sensor using a transient differential pulse pair.
TL;DR: A high-spatial-resolution and long-range distributed temperature sensor through optimizing differential pulse-width pair Brillouin optical time-domain analysis (DPP-BOTDA) is reported.
Journal ArticleDOI
Distributed Sensing at Centimeter-Scale Spatial Resolution by BOFDA: Measurements and Signal Processing
TL;DR: In this paper, an iterative method is employed to correct the acquired data from spurious effects associated to acoustic wave modulation and relevant in the high spatial resolution regime, which allows to reconstruct the Brillouin shift profile with the full spatial resolution allowed by the system bandwidth.
Journal ArticleDOI
Application of Fiber-Optic Distributed Sensors to Health Monitoring for Full-Scale Composite Structures
TL;DR: The purpose of structural health monitoring (SHM) is to lead a structure to be safer at lower cost as mentioned in this paper, and the purpose of SHM is to assess structural integrity during manufacture and in-service operation.
Journal ArticleDOI
Novel Technique to Improve Spatial Resolution in Brillouin Optical Time-Domain Reflectometry
TL;DR: In this paper, a double-pulse optical time-domain reflectometry (DP-BOTDR) system is proposed for measuring distributed strain and temperature in a fiber with a sub-meter spatial resolution.
References
More filters
Journal ArticleDOI
Brillouin gain spectrum characterization in single-mode optical fibers
TL;DR: In this paper, a pump and probe based method for Brillouin gain spectrum measurements in optical fibers is presented, which uses a single laser source together with an external modulator to generate the interacting lightwaves.
Journal ArticleDOI
Discrimination between strain and temperature effects using dual-wavelength fibre grating sensors
TL;DR: In this paper, the spectral properties of two superimposed fiber gratings having different Bragg wavelengths (850 and 1300 nm) with respect to strain and temperature were studied, and it was shown that the ratio of sensitivity at two Bragg wavelength is dependent on strain, which can be used for simultaneous measurement of these parameters.
Journal ArticleDOI
Distributed optical fibre Raman temperature sensor using a semiconductor light source and detector
TL;DR: In this paper, the first experimental measurements of the temperature distribution along silica-based optical fibres using a semiconductor laser source and an avalanche photodiode detector were reported.
Journal ArticleDOI
Fiber waveguides: a novel technique for investigating attenuation characteristics
M. K. Barnoski,S. M. Jensen +1 more
TL;DR: The time dependence of the light backscattered within the fiber as the pulse travels down the waveguide is recorded and the total loss may be determined.
Journal ArticleDOI
Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination
TL;DR: In this paper, the difference in strain and temperature response of fiber Bragg gratings and a long period fiber grating was used to discriminate between strain induced and temperature induced wavelength shifts.