Evanescent-wave comb spectroscopy of liquids with strongly dispersive optical fiber cavities

被引：13
作者：
Avino, S. [1 ]
Giorgini, A. [1 ]
Salza, M. [1 ]
Fabian, M. [1 ]
Gagliardi, G. [1 ]
De Natale, P. [2 ]
机构：
[1] Ist Nazl Ottica, CNR, I-80078 Naples, Italy
[2] Ist Nazl Ottica, CNR, I-50125 Florence, Italy
来源：
APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 20期
关键词：
RING-DOWN SPECTROSCOPY; ENHANCED ABSORPTION-SPECTROSCOPY; PHASE; FIELD; DISTANCE; LASER;
D O I：
10.1063/1.4807680
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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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页数：5
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