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FIB-milled gold-coated singlemode-multimode-singlemode fiber tip refractometer

FIB-milled gold-coated singlemode-multimode-singlemode fiber tip refractometer
FIB-milled gold-coated singlemode-multimode-singlemode fiber tip refractometer
A compact singlemode-multimode-singlemode fiber tip (SMST) refractive index sensor is demonstrated. Focused ion beam (FIB) milling is exploited to have a clean fiber tip cut which is then coated by a layer of gold to increase reflection. An average sensitivity of 265 nm/RIU and a resolvable index change of 3.77×10–5 are obtained experimentally with a ~2.94 µm diameter SMST. Because of its compactness, ease of fabrication, linear response, good sensitivity, easy connectivity to other in-fiber optical components and low cost, this refractometer could find various applications in chemical and biological sensing.
1041-1135
239-241
Ding, Ming
12b31750-03c4-4f76-aab6-64feb8f13bf0
Wang, Pengfei
a1ba240f-d4f0-4150-bcd8-cb418e841dcb
Wang, Junlong
ed26f96b-c48d-4521-aa21-3727abd8db63
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Ding, Ming
12b31750-03c4-4f76-aab6-64feb8f13bf0
Wang, Pengfei
a1ba240f-d4f0-4150-bcd8-cb418e841dcb
Wang, Junlong
ed26f96b-c48d-4521-aa21-3727abd8db63
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8

Ding, Ming, Wang, Pengfei, Wang, Junlong and Brambilla, Gilberto (2014) FIB-milled gold-coated singlemode-multimode-singlemode fiber tip refractometer. IEEE Photonics Technology Letters, 26 (3), 239-241. (doi:10.1109/LPT.2013.2291298).

Record type: Article

Abstract

A compact singlemode-multimode-singlemode fiber tip (SMST) refractive index sensor is demonstrated. Focused ion beam (FIB) milling is exploited to have a clean fiber tip cut which is then coated by a layer of gold to increase reflection. An average sensitivity of 265 nm/RIU and a resolvable index change of 3.77×10–5 are obtained experimentally with a ~2.94 µm diameter SMST. Because of its compactness, ease of fabrication, linear response, good sensitivity, easy connectivity to other in-fiber optical components and low cost, this refractometer could find various applications in chemical and biological sensing.

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e-pub ahead of print date: 14 November 2013
Published date: 1 February 2014
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 361175
URI: http://eprints.soton.ac.uk/id/eprint/361175
ISSN: 1041-1135
PURE UUID: fa41e23e-ec5b-4c90-b3b6-33828cd122ba
ORCID for Gilberto Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

Catalogue record

Date deposited: 15 Jan 2014 13:23
Last modified: 02 Apr 2022 01:38

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Contributors

Author: Ming Ding
Author: Pengfei Wang
Author: Junlong Wang

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