Optical fibre magnetic gradient detector

Details Optical fibre magnetic gradient detector Optical fibre magnetic gradient detector

1986-02-20

1987-05-12

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

350376, G01R 33022, G01R 33032, G02F 109, G01B 902

Patent

active

046653635

ABSTRACT:
Two portions (B,C) of one arm of an optical fibre Mach-Zehnder interferometer are magnetically sensitized and each has applied thereto an a.c. bias fields at a respective different frequency (w.sub.1, w.sub.2). One portion (A) of the other arm of the interferometer is magnetically sensitized and has two a.c. bias fields applied thereto, each at one of the different frequencies (w.sub.1,w.sub.2). The fields for portion A and C are aligned with a first direction (x) whereas those for A and B are parallel, A and B being separated in a second direction (y). The detected output of the interferometer at frequency w.sub.1 is related to the magnetic gradient in the y direction, whereas the detected output at frequency w.sub.2 is related to the magnetic gradient in the x direction. Thus using two bias frequencies allows one interferometer to be used to detect two gradients (FIG. 8).

REFERENCES:
patent: 4587487 (1986-05-01), Zanzucchi
patent: 4591786 (1986-05-01), Koo et al.
K. P. Koo, A. Dandridge, A. B. Tveten, and G. H. Sigel, Jr., "A Fiber-Optic DC Magnetometer", IEEE Journal of Lightwave Technology, vol. LT-1, No. 3, Sep. 1983, pp. 524-525.
K. P. Koo and G. H. Sigel, Jr., "A Fiber-Optic Magnetic Gradiometer", IEEE Journal of Lightwave Technology, vol. LT-1, No. 3, Sep. 1983, pp. 509-513.

Affiliated with

Also associated with

Rating

Optical fibre magnetic gradient detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical fibre magnetic gradient detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical fibre magnetic gradient detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1804691