Transmission–Reflection Analysis in high scattering optical fibers: A comparison with single-mode optical fiber

We demonstrate a three-port, light guiding and routing T-shaped configuration based on the combination of whispering gallery modes (WGMs) and micro-structured optical fibers (MOFs). This system includes a single mode optical fiber taper (SOFT), a slightly tapered MOF and a BaTiO3 microsphere for efficient light coupling and routing between these two optical fibers. The BaTiO3 glass microsphere is semi-immersed into one of the hollow capillaries of the MOF taper, while the single mode optical fiber taper is placed perpendicularly to the latter and in contact with the equatorial region of the microsphere. Experimental results are presented for different excitation and reading conditions through the WGM microspherical resonator, namely, through single mode optical fiber taper or the MOF. The experimental results indicate that light coupling between the MOF and the single mode optical fiber taper is facilitated at specific wavelengths, supported by the light localization characteristics of the BaTiO3 glass microsphere, with spectral Q-factors varying between 4.5 × 103 and 6.1 × 103, depending on the port and parity excitation.

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Automated Fiber-Optic System for Monitoring the Stability of the Pit Quarry Mass and Dumps

Occupational Safety in Industry ◽

10.24000/0409-2961-2021-4-19-26 ◽

2021 ◽

pp. 19-26

Author(s):

А.D. Меkhtiyev ◽

◽

E.G. Neshina ◽

P.Sh. Madi ◽

D.A. Gorokhov ◽

...

Keyword(s):

Rock Mass ◽

Optical Fiber ◽

Optical Fibers ◽

Fiber Optic ◽

Light Wave ◽

Single Mode ◽

Fiber Optic Sensors ◽

Fiber Optic Sensor ◽

Laboratory Sample ◽

Single Mode Optical Fiber

This article ls with the issues related to the development of a system for monitoring the deformation and displacement of the rock mass leading to the collapse of the quarry sides. Monitoring system uses point-to-point fiber-optic sensors. Fiber-optic sensors and control cables of the communication line are made based on the single mode optical fibers, which allows to measure with high accuracy the deformations and displacements of the rock mass at a distance of 30-50 km. To create fiber-optic pressure sensors, an optical fiber of the ITU-T G. 652.D standard is used. Laboratory sample is developed concerning the point fiber-optic sensor made based on the two-arm Mach-Zender interferometer using a single mode optical fiber for monitoring strain (displacements) with a change in the sensitivity and a reduced influence of temperature interference leading to zero drift. The article presents a mathematical apparatus for calculating the intensity of radiation of a light wave passing through an optical fiber with and without mechanical stress. A laboratory sample of single mode optical fibers based on the Mach-Zender interferometer showed a fairly high linearity and accuracy in the measurement and can be used to control the strain of the mass after appropriate refinement of its design. Mathematical expressions are also given for determining the intensity of the light wave when the distance between the fixing points of a single mode optical fiber changes depending on the change in the external temperature. A diagram for measuring strain using a point fiber-optic strain sensor is developed. Hardware and software package is developed, which can be used to perform a number of settings of measuring channels. The work is aimed at solving the production problems of the Kenzhem quarry of AK Altynalmas JSC.

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Experiments in Optical Multiplex Operation Over Single-Mode Optical Fibers Using Commercial Single-Mode Optical Fiber Couplers

Journal of Optical Communications ◽

10.1515/joc.1987.8.1.22 ◽

1987 ◽

Vol 8 (1) ◽

Cited By ~ 3

Author(s):

M. Rocks

Keyword(s):

Optical Fiber ◽

Optical Fibers ◽

Single Mode ◽

Single Mode Optical Fiber

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Single-mode Optical Fiber: An Investigation for the Bending Loss at Wavelength 650 nm

Jordan Journal of Physics ◽

10.47011/14.4.5 ◽

2021 ◽

Vol 14 (4) ◽

pp. 317-322

Keyword(s):

Optical Fiber ◽

Optical Fibers ◽

Optical Power ◽

Single Mode ◽

Optical Fiber Communication ◽

Energy Losses ◽

Fiber Communication ◽

Single Mode Optical Fiber ◽

Bending Loss ◽

Light Signals

Abstract: In modern time, the optical fiber communication has revolutionized the data transmission process and contributed vitally to the development of qualitative and speedy telecommunication systems. The arteries of this system are optical fibers which carry information as light signals and as fast as speed of light. But these light signals suffer energy losses during their propagation through the optical fibers. For the effective functioning of an optical fiber communication, it is necessary to know and prevent the prevailing energy losses (especially external bending losses) of the optical fibers. In this paper, the external bending loss of optical power while propagating through a single-mode optical fiber has been investigated. Further, the effects of wrapping turns (1 to 6 turns) and bending diameters (2 cm ≤ D ≤ 12 cm) on the power loss of laser at a wavelength of 650 nm have been studied. Keywords: Single-mode optical fiber, Bending loss, Attenuation coefficient, Wrapping turns, Bending diameter. PACs: 42.81.-I, 78.67.Pt, 42.25.Bs.

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