Science and Engineer Importance to Singapore

Singapore has boosted its water supply through water-recycling and also increased its land area by reclaiming land, all feats accomplished by engineers. And engineering will continue to be important for Singapore's future, as the country works towards becoming a smart nation and overcoming its lack of resources
Prime Minister Lee Hsien Loong
(50th anniversary celebration of the IES)

Saturday, June 2, 2012

Photonic crystal fiber tip interferometer for refractive index sensing

Authors
Jun Long Lim, et al.

Publication date
2012/6/2

Journal
Optics Letters

Publisher
Optical Society of America

Abstract
In this paper we present an interferometer based on photonic crystal fiber (PCF) tip ended with a solid silica-sphere for refractive index sensing. The sensor is fabricated by splicing one end of the holey PCF to a single mode fiber (SMF) and applying arc at the other end to form a solid sphere. The sensor has been experimentally tested for refractive index and temperature sensing by monitoring its wavelength shift. Measurement results show that the sensor has the resolution of the order of 8.7×104 over the refractive index range of 1.33–1.40, and temperature sensitivity of the order of 10pm/°C in the range of 20–100 °C.

https://www.osapublishing.org/ol/abstract.cfm?uri=ol-37-8-1373
http://dx.doi.org/10.1364/OL.37.001373

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