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Title: Fiber in-line Mach–Zehnder interferometer fabricatd by femtosecond laser micromachining for refractive index measurement with high sensitivity
Authors: Wang, Ying
Yang, Minwei
Wang, Dongning
Liu, Shujing
Lu, Peixiang
Subjects: Cladding interfaces
Compact fibers
Femtosecond laser micromachining
Fiber cores
High sensitivity
Refractive index measurement
Refractive index sensing
Refractive index units
Issue Date: 1-Mar-2010
Publisher: Optical Society of America
Source: Journal of the optical society of America B: optical physics, 1 Mar. 2010, v. 27, no. 3, p. 370-374.
Abstract: We report a compact fiber in-line Mach–Zehnder interferometer for refractive index sensing with high sensitivity and precise sensing location. One arm of the interferometer contains a microcavity formed by removing part of the fiber core near the core and cladding interface by femtosecond laser micromachining, and the other arm remains in line with the remaining part of the fiber core. Such a fiber in-line Mach-Zehnder interferometer exhibits an extremely high refractive-index-sensitivity of −9370 nm/RIU (refractive index unit) within the refractive index range between 1.31 and 1.335.
Rights: © 2010 Optical Society of America. This paper was published in Journal of the Optical Society of America B 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: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Type: Journal/Magazine Article
DOI: 10.1364/JOSAB.27.000370
ISSN: 0740-3224
Appears in Collections:EE Journal/Magazine Articles

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