Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Faraday Disk Dynamo01:23

Faraday Disk Dynamo

A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
Ferromagnetism01:31

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
Faraday's Law01:10

Faraday's Law

Faraday's law state that the induced emf is the negative change in the magnetic flux per unit of time. Any change in the magnetic field or change in the orientation of the area of the coil with respect to the magnetic field induces a voltage (emf). The magnetic flux measures the number of magnetic field lines through a given surface area. Magnetic flux is estimated from the integral of the dot product of the magnetic field vector and the area vector. The negative sign describes the direction in...
Magnetic Fields01:27

Magnetic Fields

A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
Magnetic Damping01:17

Magnetic Damping

Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
Force On A Current Loop In A Magnetic Field01:17

Force On A Current Loop In A Magnetic Field

Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical work. In motors, wire loops are enclosed in a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate. The direction of the current is reversed once the loop's surface area is lined up with the magnetic field, causing a constant torque on the loop. During the process, commutators...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Limitations in quantum metrology approaches to imaging resolution.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2024
Same author

Reply to 'Physical limitations on broadband invisibility based on fast-light media'.

Nature communications·2021
Same author

Fundamental quantum limits in ellipsometry.

Optics letters·2020
Same author

Ultrabroadband 3D invisibility with fast-light cloaks.

Nature communications·2019
Same author

Breaking Lorentz reciprocity to overcome the time-bandwidth limit in physics and engineering.

Science (New York, N.Y.)·2017
Same author

Q-plates as higher order polarization controllers for orbital angular momentum modes of fiber.

Optics letters·2015
Same journal

Gaussian-modulated continuous-variable quantum key distribution over 60 km fiber using an integrated silicon photonic receiver.

Optics letters·2026
Same journal

E2E-OCT: end-to-end joint learning model using optical coherence tomography images for vocal cord leukoplakia diagnosis.

Optics letters·2026
Same journal

Holographic generation of panoramic 3D scenes by concave ellipsoidal mirror reflection.

Optics letters·2026
Same journal

Dual-pilot phase recovery with pair-wise maximum-ratio combining for coherent PONs.

Optics letters·2026
Same journal

Mapping the whispering gallery modes of a CaF<sub>2</sub> disk resonator with half-tapered fibers to estimate the fundamental mode volume.

Optics letters·2026
Same journal

Quantitative estimation of deep-subwavelength scale via dark-field scattering axial energy concentration decay profiles.

Optics letters·2026
See all related articles

Related Experiment Video

Updated: Jun 20, 2026

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

Simple, compact, high-performance permanent-magnet Faraday isolator.

D J Gauthier, P Narum, R W Boyd

    Optics Letters
    |September 10, 2009
    PubMed
    Summary
    This summary is machine-generated.

    A novel Faraday isolator design utilizes a short glass rotator rod for uniform optical rotation. This device achieves a 45-degree rotation and over 45 dB isolation at 633 nm, enhancing optical performance.

    More Related Videos

    Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
    09:43

    Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

    Published on: November 7, 2017

    Related Experiment Videos

    Last Updated: Jun 20, 2026

    Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
    07:01

    Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

    Published on: June 9, 2016

    Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
    09:43

    Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

    Published on: November 7, 2017

    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Faraday isolators are crucial optical components for preventing back-reflections.
    • Traditional designs can suffer from non-uniformity across the aperture.
    • Development of compact and efficient isolators is an ongoing area of research.

    Purpose of the Study:

    • To present the design of a novel Faraday isolator.
    • To achieve highly uniform optical rotation across the clear aperture.
    • To demonstrate high isolation ratios in a compact form factor.

    Main Methods:

    • Design and fabrication of a Faraday isolator incorporating a short glass rotator rod (19.5 mm length).
    • Characterization of optical rotation and isolation ratio at a wavelength of 633 nm.
    • Evaluation of rotation uniformity across the clear aperture.

    Main Results:

    • The designed Faraday isolator exhibits a rotation angle of 45 degrees at 633 nm.
    • An isolation ratio exceeding 45 dB was achieved.
    • The use of a short glass rotator rod resulted in highly uniform rotation across the clear aperture.

    Conclusions:

    • The presented Faraday isolator design offers excellent performance with high isolation and uniformity.
    • The compact design is suitable for applications requiring precise control of light propagation.
    • This work contributes to the advancement of optical isolator technology.