Tapered fibre sensor

Details Tapered fibre sensor Tapered fibre sensor

1990-04-05

1991-09-03

Lee, John D.

Optical waveguides

Optical waveguide sensor

356128, G02B 616

Patent

active

050447238

ABSTRACT:
A fibre sensor used for the measurement of ambient refractive index has a tapered end. The taper of the optical fibre generates cladding modes which undergo multiple reflections at the external surface of the fibre, and therefore gives high sensitivity to the ambient index. A tapered fibre is also relatively immune to contamination by adhering droplets when the end reflection is used since the droplets tend to move to the point of greatest radius, which tends to be away from the point where the Fresnel reflection of interest occurs. The reflection from the tapered end of a multimode fibre is measured as a function of ambient refractive index. In contrast to a square-cleaved fibre, the reflection from a tapered fibre is monotonically related to the ambient index, removing an ambiguity that occurs when refractive index is measured by Fresnel reflection at normal incidence. Tapered optical fibres are suitable for probes to identify the interface between immiscible liquids.

REFERENCES:
patent: 4560248 (1985-12-01), Cramp et al.
patent: 4737004 (1988-04-01), Amitay et al.
patent: 4763976 (1988-08-01), Nolan et al.
patent: 4798438 (1989-01-01), Moore et al.
patent: 4824195 (1989-04-01), Khoe

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1003571