Optical fiber, optical sensor including optical fiber, method of manufacturing optical fiber, and deposition apparatus therefor

Patent metadata

Field	Value
Publication number	US-10197723-B2
Application number	US-201615280183-A
Country	US
Kind code	B2
Filing date	Sep 29, 2016
Priority date	Dec 1, 2015
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

Disclosed is an optical fiber including a plasmonic optical filter with a closed curved shape provided at, at least portion thereof. A method of manufacturing the plasmonic optical filter includes a step of exposing a core, a step of forming a thin metal film on the core through physical vapor deposition while rotating the core in a circumferential direction after changing a rotation axis of the core, and a step of patterning nanopatterns on the cylinder-shaped thin metal film using focused ion beam technique assisted with endpoint detection method. Due to such constitutions, an active area to generate an optical signal for optical sensor can be increased.

First claim

What is claimed is:

1. An optical fiber, wherein a plasmonic optical filter having a closed curved shape is provided to at least a portion of the optical fiber,
wherein the plasmonic optical filter is formed by patterning a thin metal film formed into a cylindrical shape at a portion of a circumferential surface of an exposed core with nanopatterns.

2. The optical fiber according to claim 1 , wherein the thin metal film is made of at least one of gold, silver, aluminum, and chrome.

3. The optical fiber according to claim 1 , wherein the nanopatterns comprise a plurality of holes perforating the thin metal film.

4. The optical fiber according to claim 1 , wherein the nanopatterns are arranged side by side.

5. An optical fiber, comprising:
a core;
a cladding surrounding a portion of the core and made of a material having a lower refractive index than a material of the core; and
an optical filter formed into a cylindrical shape at another portion of the core and comprising a thin metal film patterned with nanopatterns.

Assignees

• Univ Yonsei Iacf

Inventors

• Min Byung Kwon
• Joe Hang Eun
• Kim Hye Bin
• Nam Seung Yeon
• Bang Jin A
• CHU Na Ha

Classifications

• G01N21/7703

  using reagent-clad optical fibres or optical waveguides (using measurement of total internal reflection or attenuated total reflection G01N21/552; optical fibres or waveguides per se G02B) · CPC title

• G01N21/554

  detecting the surface plasmon resonance of nanostructured metals, e.g. localised surface plasmon resonance · CPC title

• C03C25/1063

  Metals · CPC title

• G02B6/00

  Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings · CPC title

• G02B6/02309 Primary

  Structures extending perpendicularly or at a large angle to the longitudinal axis of the fibre, e.g. photonic band gap along fibre axis · CPC title