Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4754
Title: Refractive index sensor based on a microhole in single-mode fiber created by the use of femtosecond laser micromachining
Authors: Wang, Y
Wang, D 
Yang, M
Hong, W
Lu, P
Keywords: Composite micromechanics
Fibers
Light refraction
Micromachining
Pulsed laser applications
Refractive index
Refractometers
Sensors
Single mode fibers
Issue Date: 1-Nov-2009
Publisher: Optical Society of America
Source: Optics letters, 1 Nov. 2009, v. 34, no. 21, p. 3328-3330 How to cite?
Journal: Optics letters 
Abstract: A compact in-fiber refractive index (RI) sensor is presented that is based on a microhole created in a conventional single-mode fiber by the use of femtosecond laser micromachining. The transmission properties of such a device with a microhole of different diameters have been investigated in the wavelength region of 1500-1600 nm and in the RI range of 1.30-1.45. It is found that the relationship between the transmission and the RI is critically dependent on the size of the microhole in the fiber core region. The highest resolution obtained is 6.70×10⁻⁵, in the RI range of 1.37-1.42, when the microhole diameter is ~8 μm, close to the fiber core size. The in-fiber RI sensor developed in this work is easy to fabricate and can be used to implement temperature-independent measurements.
URI: http://hdl.handle.net/10397/4754
ISSN: 0146-9592
DOI: 10.1364/OL.34.003328
Rights: © 2009 Optical Society of America. This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-21-3328. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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