Optical fiber cavity ring down measurement of refractive index with a microchannel drilled by femtosecond laser


A microchannel was inscribed in the fiber of a ring cavity which was constructed using two 0.1%:99.9% couplers and a 10-m fiber loop. Cavity ring down spectroscopy was used to measure the refractive index (RI) of gels infused into the microchannel. The ring down time discloses a nonlinear increase with respect to RI of the gel and sensitivity up to 300 µs/RI unit and an index resolution of 1.4 × 10 was obtained. © 2009 IEEE.

Divisions: College of Engineering & Physical Sciences > School of Computer Science and Digital Technologies > Electronics & Computer Engineering
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Uncontrolled Keywords: measurement by laser beam, micro-optomechanical devices, microfabrication, optical fibre couplers, optical fibre fabrication, refractive index measurement, spectroscopy, cavity ring down spectroscopy, femtosecond laser, fiber loop, gels, laser spectroscopy, microchannel, optical fiber cavity ring down measurement, cavity ring down, micromachining, optical fiber
Publication ISSN: 1041-1135
Last Modified: 23 Oct 2019 10:45
Date Deposited: 05 Jan 2010 12:48
Published Date: 2009-01-01
Authors: Zhou, Kaiming
Webb, David
Mou, Chengbo
Farries, Mark
Hayes, Neil
Bennion, Ian


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