Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4807680
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Funding
- CNR [DG.RSTL.111.003]
- MIUR with Progetto Operativo Nazionale (PON) [PON01_01525-MONICA]
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We demonstrate evanescent-wave fiber cavity-enhanced spectroscopy in the liquid phase using a near-infrared frequency comb. Exploiting strong fiber-dispersion effects, we show that liquid absorption spectra can be recorded without any external dispersive element. The fiber cavity is used both as sensor and spectrometer. The resonance modes are frequency locked to the comb teeth while the cavity photon lifetime is measured over 155 nm, from 1515 nm to 1670 nm, where absorption bands of liquid polyamines are detected as a proof of concept. Our fiber spectrometer lends itself to in situ, real-time chemical analysis in environmental monitoring, biomedical assays, and micro-opto-fluidic systems. (C) 2013 AIP Publishing LLC.
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