NDLI: Nanoscale Displacement Sensing Based on Nonlinear Frequency Mixing in Quantum Cascade Lasers

Content Provider	IEEE Xplore Digital Library
Author	Mezzapesa, F.P. Columbo, L.L. De Risi, G. Brambilla, M. Dabbicco, M. Spagnolo, V. Scamarcio, G.
Copyright Year	1995
Abstract	We demonstrate a sensor scheme for nanoscale target displacement that relies on a single quantum cascade laser (QCL) subject to optical feedback. The system combines the inherent sensitivity of QCLs to optical reinjection and their ultrastability in the strong feedback regime where nonlinear frequency mixing phenomena are enhanced. An experimental proof of principle in the micrometer wavelength scale is provided. We perform real-time measurements of displacement with λ/100 resolution by inserting a fast-shifting reference etalon in the external cavity. The resulting signal dynamics at the QCL terminals shows a stroboscopic-like effect that relates the sensor resolution with the reference etalon speed. Intrinsic limits to the measurement algorithm and to the reference speed are discussed, disclosing that nanoscale ranges are attainable.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	107
Ending Page	114
Page Count	8
File Size	3749223
File Format	PDF
ISSN	1077260X
Volume Number	21
Issue Number	6
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	Quantum cascade lasers Signal resolution Laser feedback Optical feedback Displacement measurement Optical interferometry Mathematical model Laser Sensors Quantum Cascade Laser Nano displacement Sensing Optical Feedback Interferometry laser sensors Quantum cascade laser nano displacement sensing optical feedback interferometry
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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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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