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Native signal self-mix interferometer has less than 1 nm noise equivalent displacement

Silvano Donati and Michele Norgia

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Abstract

We demonstrate that the native configuration of a self-mixing interferometer attains a minimum detectable displacement of 0.72 nm or $\lambda/1870$ at the laser wavelength of 1310 nm, obtained by the bare laser diode package including a monitor photodiode, observed in the electrical domain by means of an oscilloscope and without any electronic processing of the signal.

© 2021 Optical Society of America

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