Deep lateral displacement is an important index for evaluating the safety of geological bodies. The short range and low resolution of sensor monitoring often lead to large errors and
Based on the principle of macrobending loss of a single-mode fiber, a rod–fiber coupling structure is designed in this study using a single-mode fiber and a highly elastic rubber rod to
In this study, we investigate coupling of acoustic guided waves from different types of input fibers, through a bonded coupler, to an optical fiber. These acoustic waves can then be detected with
In this section, the optical cross-coupling effect between two fibres is analysed and explained in detail. From these assumptions, expected trends and influencing parameters are
Distributed acoustic sensing (DAS) records represent the strain (rate) in an optical fiber averaged over a gauge length about a specified channel. In the presence of bends and variable coupling to the
Abstract This paper investigates the impact of interface angles on the coupling efficiency of a fiber Fabry-Perot interferometer (FFPI) sensor using both simulation and experimental methods.
Download Citation | Deep lateral displacement sensing experiment for rod–fiber coupling structure based on macrobending loss | Deep lateral displacement is an important index for
The mechanical coupling between an optical fiber, incorporated in a buried fiber optic cable, and the subsurface was analysed. A simple analytical
In this paper, a sensing detection method based on the fiber wedge angle microstructure for coupling excitation of microtubular cavity resonance was proposed. The theoretical model of
We present a compact highly sensitive microfiber coupler-based twist sensor formed by fusing and tapering two optical fibers and then connecting two of the pigtails to form a Sagnac loop.
Working principle of the fiber optic coupler vibration sensor. The displacement characteristic response of the 1x2 fiber optic coupler as vibration sensor.
In this issue of Cell Reports Methods, Formozov et al. present an innovative fiber photometry system that uses a fused fiber coupler (FFC) instead
The force-enhanced light coupling between two optical fibres is investigated for the application in a pressure or force sensor, which can be
A high sensitivity strain and temperature sensor with large measurement range based on Vernier effect in two parallel optical fiber Sagnac loops was proposed and experimentally investigated.
This paper introduces a scheme for free-space optical communication utilizing a single adaptive fiber coupler, which can mitigate turbulence and other disturbances at minimal cost.
In this experiment, we use optical fiber as an optical transmission device, which can be related to a number of fiber optic sensing experiments with easy operation and observation of sensing
Optical fiber coupling refers to the process of joining optical fibers to split or combine light with minimal loss, utilizing methods such as fusion splicing, mechanical splicing, or connectors. The efficiency of
The coupling performance between sensing fiber and sand, and the strain transfer law between them were analyzed from the test results and sensing fiber characteristics.
The micromechanical behaviors and mechanics-optics coupling effects of optic-fiber-concrete complex in the distributed optic-fiber sensing concrete-crack technology, which was used in
Previous studies demonstrated coupling of acoustic guided waves from one optical fiber to another through a simple adhesive bond coupler. This
It delves into various sensing experiments utilizing semi-tapered fibers, bi-tapered fibers, tapered fiber couplers, tapered fiber resonators, FP cavities created with tapered fibers, and S-shaped tapered fibers.
The mechanical coupling between soil and fiber optic cable is vital to the validity of ground settlement data monitored using distributed fiber optic sensing (DFOS).
The application of distributed fiber optic strain sensing technology in soil settlement deformation monitoring is becoming increasingly widespread, and the interface coupling
Abstract. Recently published experimental works on remotely bonded fiber Bragg grating (FBG) ultrasound (US) sensors show that they display some unique characteristics that are not
We present a bi-conical optical directional coupler composed of solid and hollow core fibers. Through an evanescent wave coupling mechanism, the
A coherent laser pulse is coupled into the optical fiber and the phase difference of elastically backscattered photons from neighbouring positions along
Abstract Making a novel coupling optical fiber strain sensor based on to heat continually the coupled zone of single-mode fused optical fiber coupler to the required coupling.
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