Tapered optical fiber sensor

Details Tapered optical fiber sensor Tapered optical fiber sensor

1990-09-21

1992-03-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023119, 385 15, 385123, H01J 516, G01D 534, G02B 626

Patent

active

050935690

ABSTRACT:
A sensor is disclosed in which light is launched into the core of a singlode optical fiber having a tapered-down or narrow waist region between 2 tapers along an internal portion of the length thereof. The fiber is positioned so that a physical effect to be measured bends the fiber in the narrow waist region. The intensity of the light exiting from the core of the fiber is measured and the displacement is determined in accordance with the measured intensity. The narrow waist region of the fiber has a V.sub.co parameter of less than 1. A bellows which changes dimension with a change in pressure may be coupled to the fiber to bend it in the waist region in proportion to pressure changes. A magnetostrictive element which changes dimension with changing magnetic field may be coupled to the narrow waist region so that a change in dimension causes a displacement which bends the fiber.

REFERENCES:
patent: 4358678 (1982-11-01), Lawrence
patent: 4443700 (1984-04-01), Macedo et al.
patent: 4634858 (1987-01-01), Gerdt et al.
patent: 4729630 (1988-03-01), Martinez
patent: 4895423 (1990-01-01), Bilodeau et al.
patent: 4918305 (1990-04-01), Wlodarczyk et al.
patent: 4936649 (1990-06-01), Lymer et al.
patent: 4972073 (1990-11-01), Lessing

Affiliated with

Also associated with

Rating

Tapered optical fiber sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tapered optical fiber sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tapered optical fiber sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-274059