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US-2015277049-A1 · Oct 1, 2015 · US
Fiber bragg grating in micro/nanofiber and method of producing the same
US9335468B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9335468-B2 |
| Application number | US-70378810-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 11, 2010 |
| Priority date | Feb 11, 2010 |
| Publication date | May 10, 2016 |
| Grant date | May 10, 2016 |
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Abstract
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A method of fabricating Fiber Bragg gratings in a micro/nanofiber using ultrashort pulse irradiation, the method includes elongating and flame-brushing a single mode optical fiber to create a micro/nanofiber, and generating the ultrashort pulse irradiation to induce a plurality of refractive index changes at predetermined intervals within the micro/nanofiber, wherein the ultrashort pulse propagates through a focusing element and a diffractive element prior to propagating on the micro/nanofiber.
First claim
Opening claim text (preview).
What is claimed is: 1. An ambient environment refractive index sensing device comprising: an optical micro/nanofiber having Fiber Bragg grating comprising periodic refractive index changes at predetermined intervals within a core of the optical micro/nanofiber, the optical micro/nanofiber is a cladding-less fiber, wherein the optical micro/nanofiber, for being immersed in an ambient medium, is capable of measuring refractive index of the ambient medium surrounding the optical micro/nanofiber; and wherein the optical micro/nanofiber having a diameter of 2 μm blue-shifts center wavelength of the Fiber Bragg grating to exhibit high measurement sensitivity. 2. The refractive index sensing device of claim 1 , wherein the measurement of the refractive index of the ambient medium surrounding the optical micro/nanofiber is operated in third or higher order resonance mode to obtain high measurement sensitivity. 3. The refractive index sensing device of claim 1 , wherein the refractive index of the ambient medium is in a range of 1.32 to 1.46. 4. An ambient environment refractive index sensing system comprising: the refractive index sensing device of claim 1 ; a light source for generating light, which is transmitted to the refractive index sensing device; and an optical spectrum analyzer for measuring the center wavelength blue-shifted by the refractive index sensing device; wherein the measurement of the refractive index of the ambient medium surrounding the optical micro/nanofiber is operated in a third or higher order resonance mode having more energy distributed outside the optical micro/nanofiber to obtain high measurement sensitivity. 5. The refractive index sensing system of claim 4 , wherein the measurement of the refractive index of the ambient medium surrounding the optical micro/nanofiber is operated in a fifth order resonance mode at the reflective index of 1.44.
Assignees
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Classifications
involving moving the fibre or a manufacturing element, stretching of the fibre (G02B6/02147 takes precedence) · CPC title
- G02B6/02142Primary
based on illuminating or irradiating an amplitude mask, i.e. a mask having a repetitive intensity modulating pattern · CPC title
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- What does patent US9335468B2 cover?
- A method of fabricating Fiber Bragg gratings in a micro/nanofiber using ultrashort pulse irradiation, the method includes elongating and flame-brushing a single mode optical fiber to create a micro/nanofiber, and generating the ultrashort pulse irradiation to induce a plurality of refractive index changes at predetermined intervals within the micro/nanofiber, wherein the ultrashort pulse propag…
- Who is the assignee on this patent?
- Wang Dongning, Fang Xia, Liao Changrui, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification G02B6/02142. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 10 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).