A new concept for non-invasive optical sensing: random lasing

Federico Tommasi; Emilio Ignesti; Lorenzo Fini; Fabrizio Martelli; Stefano Cavalieri

doi:10.1117/12.2265534

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16 May 2017 A new concept for non-invasive optical sensing: random lasing

Federico Tommasi, Emilio Ignesti, Lorenzo Fini, Fabrizio Martelli, Stefano Cavalieri

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Proceedings Volume 10231, Optical Sensors 2017; 102310E (2017) https://doi.org/10.1117/12.2265534
Event: SPIE Optics + Optoelectronics, 2017, Prague, Czech Republic

Abstract

Optical sensing has been subject to a great interest for the moderate intrusiveness of its operation. The introduction of random lasers in ’90s has opened the door for developing a new kind of optical sensors. In such a source, disorder is introduced within an inverted medium, increasing the lifetime of the radiation without the presence of an optical cavity. The striking point is that the spectral characteristics of the output emission are strongly dependent on the scattering properties of the medium, suggesting new methods to investigate disordered materials. Recently, a novel concept for optical sensing based on the physics of random laser has been reported,¹ overcoming the limits due to the alteration of the investigated sample by injecting an active material. Here we present a characterization of such a kind of sensor, suggesting non-invasive and also in-vivo applications.

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Federico Tommasi, Emilio Ignesti, Lorenzo Fini, Fabrizio Martelli, and Stefano Cavalieri "A new concept for non-invasive optical sensing: random lasing", Proc. SPIE 10231, Optical Sensors 2017, 102310E (16 May 2017); https://doi.org/10.1117/12.2265534

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