Online distributed strain measurement of fiber Michelson hydrophones based on DPP-BOTDA with a pulsed-probe wave
نویسندگان
چکیده
منابع مشابه
Monitoring the propagation of mechanical waves using an optical fiber distributed and dynamic strain sensor based on BOTDA.
We report a Brillouin-based fully distributed and dynamic monitoring of the strain induced by a propagating mechanical wave along a 20 m long composite strip, to which surface a single-mode optical fiber was glued. Employing a simplified version of the Slope-Assisted Brillouin Optical Time Domain Analysis (SA-BOTDA) technique, the whole length of the strip was interrogated every 10 ms (strip sa...
متن کاملOptimization of a DPP-BOTDA sensor with 25 cm spatial resolution over 60 km standard single-mode fiber using Simplex codes and optical pre-amplification.
Sub-meter distributed optical fiber sensing based on Brillouin optical time-domain analysis with differential pulse-width pairs (DPP-BOTDA) is combined with the use of optical pre-amplification and pulse coding. In order to provide significant measurement SNR enhancement and to avoid distortions in the Brillouin gain spectrum due to acoustic-wave pre-excitation, the pulse width and duty cycle o...
متن کاملHighly Sensitive Fiber Michelson Interferometer Based on a Liquid-Filled Photonic Crystal Fiber with Dispersion Engineering
Photonic crystal fiber interferometers (PCFIs) with superiority of the unique fiber structure have been extensively developed as the all-fiber based strain () [1], external refractive index (RI) [2], chemical [3] and bending sensors [4]. The majority of the valuable applications on the fiber-optic sensing are all accredited to the air voids structured periodically in the photonic crystal fibe...
متن کاملFiber-optic Michelson interferometer with high sensitivity based on a liquid-filled photonic crystal fiber
This study proposes an ultracompact and highly sensitive liquid-filled photonic crystal fiber Michelson interferometer (LF-PCFMI) based on material dispersion engineering. Numerical simulations and experimental measurements are performed in the work, and both of their results show that the temperature sensitivity can be more greatly improved than those of conventional photonic crystal fiber int...
متن کاملAdaptable Optical Fiber Displacement-Curvature Sensor Based on a Modal Michelson Interferometer with a Tapered Single Mode Fiber
A compact, highly sensitive optical fiber displacement and curvature radius sensor is presented. The device consists of an adiabatic bi-conical fused fiber taper spliced to a single-mode fiber (SMF) segment with a flat face end. The bi-conical taper structure acts as a modal coupling device between core and cladding modes for the SMF segment. When the bi-conical taper is bent by an axial displa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Optics Express
سال: 2019
ISSN: 1094-4087
DOI: 10.1364/oe.27.022375