Authors
Abeer Al Mohtar, Julien Vaillant, Zoreh Sedaghat, Michel Kazan, Lilian Joly, Claudia Stoeffler, Julien Cousin, A Khoury, Aurélien Bruyant,
Title
Generalized lock-in detection for interferometry: application to phase sensitive spectroscopy and near-field nanoscopy
In
Optics express
Volume
22
Issue
18
Pages
22232–22245
Publisher
Optical Society of America
Year
2014
Publisher's URL
http://scholar.google.fr/scholar_url?url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3Furi%3Doe-22-18-22232&hl=en&sa=T&ei=hZ-2VN2-HOKO0AGOt4DwAQ&scisig=AAGBfm0jIzW4NPHC0X2pxgHZkQzVriSlFw&nossl=1&ws=633x597
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Abstract
A generalized lock-in detection method is proposed to extract amplitude and phase from optical interferometers when an arbitrary periodic phase or frequency modulation is used. The actual modulation function is used to create the reference signals providing an optimal extraction of the useful information, notably for sinusoidal phase modulation. This simple and efficient approach has been tested and applied to phase sensitive spectroscopy and near-field optical measurements. We analyze the case where the signal amplitude is ...
Affiliations
Offprint