Enhanced current sensitivity in the optical fiber doped with CdSe quantum dots

Abstract

A new optical fiber current sensor using a CdSe quantum dots doped optical fiber has been demonstrated with high Faraday rotation for remote sensing of current from 0 to 40 Amperes. It showed enhancement in the current sensitivity by about 2 times than that of the single mode optical fiber current sensor at 632 nm.

Optical properties and up-conversion of Pr3+ doped CdS nanoparticles in sol–gel glasses

“…The effective mass model is commonly used to study the size dependence of optical properties of quantum dots system [4]. They find wide range of applications such as in optical amplifier, wave-guide, solar energy devices, up-conversion laser, electrooptics devices and biological labeling [5][6][7][8]. Recently, a lot of work has been done on the preparation and fluorescence properties of Eu 3 + : CdS in the sol-gel derived silica matrices [9,10].…”

Development of Bismuth Sulphide Quantum Dot

“…Semiconductor nanoparticles with size of a couple of nanometers in a glass network demonstrates an alluring properties and totally unique in relation to mass materials on account of quantum restriction impact [1], in which electron and gap wave capacities are bound by profound potential provided by glass lattice [2]. Recent reports demonstrates that semiconductor nanoparticles of size under 10 nm in glass have huge optical nonlinearity and quick reaction time which has pulled in consideration because of their wide applications such as in optical switches, nonlinear material, optical sensors and so on [3][4][5].…”

Influence of gamma-ray irradiation on Faraday effect of Cu-doped germano-silicate optical fiber

“…When it comes to specialty optical fibers incorporated with various dopants, radiation-induced defect centers and oxidation-reduction reaction related with the specific dopants may influence the magneto-optic properties of the optical fiber. Addition of dopants in glass optical fiber leading to the increase of Faraday rotation and thus its Verdet constant is well-known and it is useful to apply for fiber optic current sensor (FOCS) by enhancing the current sensitivity [9][10][11].…”

“…The Faraday effect is a magneto-optic phenomenon in optical fiber which causes the rotation of plane of light passing through the optical fiber when magnetic field is applied in the direction of propagation of the light [11]. The Faraday rotation is originated from the difference between refractive indices for right and left circularly polarized light (n R and n L ) at a given wavelength k, and the …”