High Stability Fiber Optic Magnetic Field Sensor with Enhanced Linear Range Using Magnetic Feedback Nulling.
Abstract
This patent application discloses a fiber optic interferometer-type magnetic field sensor which uses an automatic feedback system to limit the range of the magnetic field experienced by the sensor element. A high frequency bias field is mixed with the external magnetic field to be measured and the resulting interferometer output signal is converted to an electric output signal. The electric output signal is mixed with a reference signal having the same frequency as the bias signal to form a baseband negative feedback signal which is converted to a magnetic field and mixed with the bias and external fields to provide automatic feedback.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 07, 1985
- Accession Number
- ADD012055
Entities
People
- A. B. Tveten
- A. Danridge
- G. H. Sigel
- K. P. Koo
Organizations
- United States Department of the Navy