Introduction and measurement of the effective Verdet constant of spun optical fibers

Radiation Effect on Optical Properties of Bi-Related Materials Co-Doped Silica Optical Fibers

Bismuth - Fundamentals and Optoelectronic Applications ◽

10.5772/intechopen.93495 ◽

2020 ◽

Author(s):

Jianxiang Wen ◽

Ying Wan ◽

Yanhua Dong ◽

Yi Huang ◽

Yanhua Luo ◽

...

Keyword(s):

Optical Properties ◽

Radiation Dose ◽

Optical Fibers ◽

Low Dose ◽

High Dose ◽

Verdet Constant ◽

Doped Fibers ◽

Dose Radiation ◽

Co Doped ◽

Pump Absorption

Three kinds of Bi-related materials co-doped silica optical fibers (BRDFs), including Bi/Al, Bi/Pb, and Bi/Er co-doped fibers, were fabricated using atomic layer deposition (ALD) and modified chemical vapor deposition (MCVD). Then, the effect of irradiation on the optical properties of BRDFs was investigated. The experimental results showed that the fluorescence intensity, the fluorescence lifetime of BRDFs at the 1150 nm band, increased significantly with low-dose treatment, whereas it decreased with a further increase in the radiation dose. In addition, the merit Mα values of the BRDFs, a ratio of useful pump absorption to total pump absorption, decreased with an increase of the radiation doses. The Verdet constants of different doped fibers increased up to saturation level with increases in the radiation dose. However, for a Bi-doped fiber, its Verdet constant decreased and the direction of Faraday’s rotation changed under low-dose radiation treatment. In addition, the Verdet constant increase of the Bi-doped silica fiber was much faster than that of other single mode fiber (SMF) and Pb-doped silica fibers treated with high-dose radiation. All of these findings are of great significance for the study of the optical properties of BRDFs.

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Faraday effect in standard optical fibers: dispersion of the effective Verdet constant

Applied Optics ◽

10.1364/ao.35.000922 ◽

1996 ◽

Vol 35 (6) ◽

pp. 922 ◽

Cited By ~ 63

Author(s):

J. L. Cruz ◽

M. V. Andres ◽

M. A. Hernandez

Keyword(s):

Optical Fibers ◽

Faraday Effect ◽

Verdet Constant

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Supercontinuum Generation in Optical Fibers

10.1017/cbo9780511750465 ◽

2009 ◽

Cited By ~ 262

Keyword(s):

Optical Fibers ◽

Supercontinuum Generation

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High-voltage monitoring by the fiber-optic recirculating measuring system

Izmeritel`naya Tekhnika ◽

10.32446/0368-1025it.2020-2-38-44 ◽

2020 ◽

pp. 38-44

Author(s):

A. V. Polyakov ◽

M. A. Ksenofontov

Keyword(s):

Optical Fibers ◽

High Voltage ◽

Optical Sensors ◽

Electromagnetic Interference ◽

Fiber Optic ◽

Electric Power Industry ◽

Measuring System ◽

Voltage Range ◽

External Electromagnetic Fields ◽

Optic Communication

Optical technologies for measuring electrical quantities attract great attention due to their unique properties and significant advantages over other technologies used in high-voltage electric power industry: the use of optical fibers ensures high stability of measuring equipment to electromagnetic interference and galvanic isolation of high-voltage sensors; external electromagnetic fields do not influence the data transmitted from optical sensors via fiber-optic communication lines; problems associated with ground loops are eliminated, there are no side electromagnetic radiation and crosstalk between the channels. The structure and operation principle of a quasi-distributed fiber-optic high-voltage monitoring system is presented. The sensitive element is a combination of a piezo-ceramic tube with an optical fiber wound around it. The device uses reverse transverse piezoelectric effect. The measurement principle is based on recording the change in the recirculation frequency under the applied voltage influence. When the measuring sections are arranged in ascending order of the measured effective voltages relative to the receiving-transmitting unit, a relative resolution of 0,3–0,45 % is achieved for the PZT-5H and 0,8–1,2 % for the PZT-4 in the voltage range 20–150 kV.

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