NDLI: A Highly Accurate All-Fiber MMZI Current Sensor

Content Provider	IEEE Xplore Digital Library
Author	Ramachandran, K. Kumar, N. Sahoo, V.
Copyright Year	2001
Abstract	Earlier reported micro-Mach-Zehnder interferometer (MMZI) sensors, fabricated by concatenation of tapered fibers, considered the interference between LP01 and LP02 modes only for generating the fringe pattern. However, the experimental studies evidenced aperiodic and nonsinusoidal spectral response, which may be attributed to the occurrence of interference among higher order cladding and LP01 and LP02 modes enroute the interference region. In order to accommodate the effect of interference among the higher order cladding modes, a perturbation term has been inserted in the expression for free spectral range and formula for shift in the fringes, due to rise in temperature of the fiber, in this paper. Furthermore, three samples of in-house fabricated MMZIs, placed over a direct current carrying power resistor, senses the temperature produced due to emanation of Joule's heat and resulted into shift in the output fringe pattern. The effect of change in temperature/current is displayed as shift in the output spectrum, recorded on an optical spectrum analyzer, in accordance with the amended equations. The fabricated sample demonstrates the higher current sensitivity 1.76 nm/A² with the regression/correlation coefficient (R²) value 0.99.
Sponsorship	IEEE Sensors Council
Starting Page	1270
Ending Page	1274
Page Count	5
File Size	682635
File Format	PDF
ISSN	1530437X
Volume Number	15
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical fiber sensors Interference Optical fiber polarization Temperature sensors Heating Fiber temperature sensor Fiber current sensor Micro Mach-Zehnder interferometer fiber temperature sensor micro Mach-Zehnder interferometer
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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