Generalized lock-in detection for interferometry: application to phase sensitive spectroscopy and near-field nanoscopy - Archive ouverte HAL Access content directly
Journal Articles Optics Express Year : 2014

Generalized lock-in detection for interferometry: application to phase sensitive spectroscopy and near-field nanoscopy

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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 modulated and we show how to suppress the contribution of unmodulated background field.

Dates and versions

hal-02351709 , version 1 (06-11-2019)

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Abeer Al Mohtar, Julien Vaillant, Zohreh Sedaghat, Michel Kazan, Lilian Joly, et al.. Generalized lock-in detection for interferometry: application to phase sensitive spectroscopy and near-field nanoscopy. Optics Express, 2014, 22 (18), pp.22232. ⟨10.1364/OE.22.022232⟩. ⟨hal-02351709⟩

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