Ultra-broadband high-resolution microdroplet spectrometers for the near infrared

Year: 2022

Authors: Capezzuto M., D’Ambrosio D., Avino S., Giorgini A., Gagliardi G., Malara P.

Autors Affiliation: CNR-INO, Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, via Campi Flegrei 34, NA, Pozzuoli, 80078, Italy

Abstract: By stabilizing the evaporation dynamics of a microliter
fluorocarbon droplet, we demonstrate a fast-scan optoflu-
idic Fourier transform (FT) spectrometer on the tip of
an optical fiber operating in the 1000–2000 nm window
with a resolution of 3.5 cm−1 (i.e., <1 nm at 1560 nm). Compared with other FT near-infrared (NIR) small-scale spectrometers reported in the literature, the fluorocarbon droplet spectrometer shows the largest wavelength span and span/resolution ratio, allowing spectral analysis of broad- band or narrowband radiation to be easily performed. Our results open the way for the practical application of droplet spectrometers as advanced optofluidic NIR analyzers with small size and low cost that are capable of operating in harsh environments, even in the absence of electrical power sources Journal/Review: OPTICS LETTERS

Volume: 47 (1)      Pages from: 102  to: 105

KeyWords: Fourier transform spectrometer, chip, FTIR spectrometer, fiber tip, droplet evaporation.
DOI: 10.1364/OL.444687

Connecting to view paper tab on IsiWeb: Click here