Optical fiber with high small-angle scatter and sensor using...

Details Optical fiber with high small-angle scatter and sensor using... Optical fiber with high small-angle scatter and sensor using...

2006-09-05

2006-09-05

Connelly-Cushwa, Michelle (Department: 2874)

Optical waveguides

Optical fiber waveguide with cladding

C385S027000, C385S028000, C385S030000

Reexamination Certificate

active

07103250

ABSTRACT:
An optical fiber (10) having a first section (10A) with little or no small-angle scattering (SAS) and a second section (10B) with an increased amount of SAS is disclosed. The optical fiber is formed by changing the draw temperature (TD) and/or the draw speed (VD) so as to induce index of refraction perturbations (P) at a core interface (40). The SAS optical fiber is useful in forming an evanescent optical fiber sensor (400), wherein the increased SAS enhances an evanescent wave portion (436) of a guided wave (434), which leads to increased sensitivity when measuring a property of a test medium (500).

REFERENCES:
patent: 2003/0174516 (2003-09-01), Goto et al.
Eric G. Rawson; “Analysis of Scattering from Fiber Waveguides with Irregular Core Surfaces”; Applied Optics, vol. 13, No. 10, pp. 2370-2377, Oct. 1974.

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