US 10,866,081 B2Granted

Waveguide interferometer

AssigneeInphotech Sp. Z O.O.

InventorsTomasz Nasilowski, Marek Napierala, Anna Makowska, Michal Murawski, Dawid Budnicki, Janusz Fidelus, Zbigniew Holdynski, Lukasz Szostkiewicz, Lukasz Ostrowski, Karol Wysokinski, Ana Pytel

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Abstract

A waveguide interferometer includes a multicore fiber used a multicore waveguide, where the multicore waveguide includes a coupler section formed by tapering a portion of the multicore waveguide so that one core though which a light source is fed is optically coupled to another core that is terminated differently that the core into which the source signal is provided. The terminations respond differently upon being exposed to an environmental condition or substance, and the difference in response to the environmental condition or substance results in a shift in interference of the light reflected back through the multicore waveguide, which is detected with a detector on the same side of the multicore waveguide as the light source.

Claims15

Dependent claims

A waveguide interferometer for measuring optical parameters, comprising:

a light source configured to feed a light to a first core of a multicore waveguide at a first side of the multicore waveguide through a single core optical fiber that is coupled to the first core of the multicore waveguide, wherein the multicore waveguide is a multicore optical fiber and has at least the first core and a second core, where the first core has an output at a second side of the multicore waveguide, wherein a splitter is provided on the multicore waveguide, between the first side and the second side of the multicore waveguide, that splits the light from the light source between the first core and the second core, wherein the output of the first core is coated with at least one chemically active substance, and the first core is connected to a signal detector at the first side of the multicore waveguide through the single core optical fiber.

Dependencies are inferred from the claim text.

Facts

Application: 16/434,733Filed 7 Jun 2019 · continuation
Priority: PL P.4197016 Dec 2016
Published: US 2019/0310069 A110 Oct 2019
Granted: 15 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G01B 9/02015
Interferometers: characterised by the beam path configuration
G01B 9/02
Measuring instruments characterised by the use of optical techniques: interferometers
G01B 11/0675
Of coating: using interferometry
G02B 6/4216
Packages, e.g. shape, construction, internal or external details: incorporating polarisation-maintaining fibres

Family

PCT/PL2017/050059Parent of this continuation · filed 6 Dec 2017
US 2019/0310069 A1Pre-grant publication · published 10 Oct 2019
US 10,866,081 B2This patent

From the US filing history. Foreign family members aren’t listed.

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