High magnetic field measurement utilizing Faraday rotation in SF11 glass in simplified diagnostics

Dey, P. K.; Shukla, Rohit; Venkateswarlu, D.

doi:10.1364/ao.56.002873

Cited by 6 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Remote sensing of pulsed high magnitude current and magnetic field is a challenging task. Numerous techniques have been reported in this regard, including Hall effect [9][10][11][12][13], magneto-optic Faraday effect [14][15][16][17][18], electromagnetic coupling on a coil using B-dot probe or pick up coil [19][20][21][22] and magnetoresistive materials [19,23] etc.…”

Section: Introductionmentioning

confidence: 99%

A novel and cost-effective optical detection of high magnitude current and magnetic pulses through a metallic cantilever

Ullah¹,

Hussain²,

Faisal³

2022

Laser Phys.

View full text Add to dashboard Cite

We report a novel optical technique to measure short duration high magnitude current and magnetic pulses based on deflection of a macroscopic ferromagnetic cantilever. Deflection of the cantilever as a transducer takes place due to the attraction by an electromagnet. The reflected laser beam from a small thin mirror at tip of the cantilever is scanned over two spatially distinct photodetectors. Different high magnitude magnetic pulses are produced by discharging a capacitor bank through an inductive coil with a ferrite core. The response of the sensor is observed at different charging limits of the capacitor bank and spatial intervals between cantilever and inductive coil. A repeatable and linear response is detected by the devised sensors in the range 158.53–380.47 A current and 0.19–0.48 T magnetic field with sensitivity of 39.15 A kV−1 and 50.98 mT kV−1 for current and magnetic field amplitudes respectively in response to 2.5–6.0 kV charging of the capacitor bank. The proposed technique is remote, nondestructive, cost-effective and has a large dynamic range.

show abstract

Section: Introductionmentioning

confidence: 99%

A novel and cost-effective optical detection of high magnitude current and magnetic pulses through a metallic cantilever

Ullah¹,

Hussain²,

Faisal³

2022

Laser Phys.

View full text Add to dashboard Cite

show abstract

“…Polarization is one of the fundamental properties of light and determines how the latter interacts with matter. Its measurement results therefore essential in nearly all areas of science and technology such as astronomy 1,2 , optics and photonics 3,4 , chemistry 5 , liquid crystal industry 6 , remote sensing 7 , and terahertz technology 8 , to name just a few. Unlike intensity and frequency, the characterization of the polarization state of light is more challenging because of its vectorial nature.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Polarization Rotation Measurement through a High‐Order Vector Beam Generated by a Metasurface

Yue

Aglieri

Piccoli

et al. 2020

Adv Materials Technologies

View full text Add to dashboard Cite

The precise determination of the polarization state of light is fundamental for a vast variety of applications in remote sensing, astronomy, optics and terahertz technology, to name just a few. Typically, polarization characterization is performed by using a combination of multiple optical devices such as beam splitters, polarizers, and waveplates. Moreover, to achieve highprecision, balanced photodetectors and lock-in amplifiers are employed, thus contributing to increasing system complexity. Here, a technique for polarization rotation measurements with a dynamic range of 180° and a sensitivity of about 10−2 degrees is realized using a properly designed metasurface. Such device generates a vector beam with an azimuthally-dependent polarization distribution, as a result of the superposition of two vortex beams carrying opposite orbital angular momenta (ℓ = ±30). After propagation through a linear polarizer, the spatial intensity profile of such a beam turns into 60 lobes. By tracking the displacement of only two of these lobes on a camera, the rotation of the input polarization state can be retrieved with high resolution. The proposed approach offers a new route toward the development of compact high-precision polarimeters and can also be exploited in quantum information processing, optical communications, as well as nonlinear and chiral optics.

show abstract

Simplified high-current measurement probe based on a single-mode optical fiber

Dey

Shukla

Sharma

2018

Review of Scientific Instruments

View full text Add to dashboard Cite

A “fiber optic cable tester” of 658 nm wavelength has been used to launch a linearly polarized light to the twisted single mode optical fiber of the designed mega-ampere current measurement probe. Modulated intensity variation of light has been converted to the corresponding electrical signal using a fast photodetector assembly having 100 nS rise-time. The effect of undesired linear birefringence has been overcome by manually twisting the fiber at a twist rate of 40 twists per meter. The sensitivity of the designed probe is 0.247° polarization rotation/kA current-turn product, for a single optical fiber loop.

show abstract

High magnetic field measurement utilizing Faraday rotation in SF11 glass in simplified diagnostics

Cited by 6 publications

References 18 publications

A novel and cost-effective optical detection of high magnitude current and magnetic pulses through a metallic cantilever

A novel and cost-effective optical detection of high magnitude current and magnetic pulses through a metallic cantilever

Highly Sensitive Polarization Rotation Measurement through a High‐Order Vector Beam Generated by a Metasurface

Simplified high-current measurement probe based on a single-mode optical fiber

Contact Info

Product

Resources

About