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

You might also read

Related Articles

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

Sort by
Same author

Therapeutic potential of adipose-derived stem cell transplantation in amyotrophic lateral sclerosis: A combined clinical case and preclinical study.

Tzu chi medical journal·2026
Same author

Ligand Engineering for Precise Control of Ultrathin CsPbI<sub>3</sub> Nanoplatelet Superlattices for Efficient Light-Emitting Diodes.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Association of maternal glucose and body mass index with adverse pregnancy outcomes among women with normal oral glucose tolerance test results.

Diabetes & metabolic syndrome·2026
Same author

Cryopreservable dopaminergic progenitors derived from human iPSCs with accelerated loss of pluripotency and early functional restoration in Parkinsonian rats.

NPJ Parkinson's disease·2026
Same author

Hydroxychloroquine inhibits porcine epidemic diarrhea virus infection by targeting post-attachment stages and virus-induced inflammation in vitro.

Microbial pathogenesis·2026
Same author

Advances in nanotechnology for addressing biofilm-related challenges in medical devices.

Nanotechnology·2026

Related Experiment Video

Updated: May 31, 2026

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics
09:00

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics

Published on: October 27, 2017

Sensitive Faraday rotation measurement with auto-balanced photodetection.

Chia-Yu Chang1, Likarn Wang, Jow-Tsong Shy

  • 1Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan. yuhnchang@gmail.com

The Review of Scientific Instruments
|July 5, 2011
PubMed
Summary

This study demonstrates a sensitive magneto-optic polarimetry technique using auto-balanced photodetection to measure the Faraday rotation of air. The method achieves high angular sensitivity, surpassing the shot noise limit for precise magnetic field measurements.

More Related Videos

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
09:48

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Published on: June 30, 2018

Related Experiment Videos

Last Updated: May 31, 2026

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics
09:00

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics

Published on: October 27, 2017

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
09:48

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Published on: June 30, 2018

Area of Science:

  • Optics and Photonics
  • Magneto-optics
  • Precision Measurement

Background:

  • Magneto-optic polarimetry is crucial for measuring magnetic fields.
  • Conventional methods can be limited by noise and drift.
  • High sensitivity is required for accurate measurements of weak magnetic fields, such as those in air.

Purpose of the Study:

  • To investigate an auto-balanced photodetection system for magneto-optic polarimetry.
  • To measure the Faraday rotation and Verdet constant of air with high sensitivity.
  • To demonstrate a noise-cancellation technique for improved measurement stability.

Main Methods:

  • Utilized a commercial auto-balanced photoreceiver for Faraday rotation measurement.
  • Implemented a specific setup to leverage the noise cancellation capabilities of the photoreceiver.
  • Applied a small AC current to generate the magnetic field, preventing coil heating.
  • Employed a double current modulation scheme to verify measurement stability and eliminate zero drift.

Main Results:

  • Achieved an angular sensitivity of 2.99×10⁻⁸ rad Hz⁻¹/².
  • Sensitivity was approximately 2.7 times better than the shot noise limit.
  • Measured the Verdet constant of air as +1.39×10⁻⁹ rad G⁻¹ cm⁻¹ at 634.8 nm.
  • Demonstrated the absence of zero drift and amplifier instability.

Conclusions:

  • Auto-balanced photodetection offers a flexible and sensitive approach for magneto-optic polarimetry.
  • The developed technique provides high precision measurements of the Verdet constant of air.
  • Potential for further sensitivity improvements and diverse applications in magnetic field sensing exists.