scholarly journals Cavity enhanced absorption spectroscopy in the mid-infrared using a supercontinuum source

2017 ◽  
Vol 111 (6) ◽  
pp. 061103 ◽  
Author(s):  
Caroline Amiot ◽  
Antti Aalto ◽  
Piotr Ryczkowski ◽  
Juha Toivonen ◽  
Goëry Genty
Keyword(s):  
Absorption Spectroscopy ◽  
Mid Infrared ◽  
Enhanced Absorption ◽  
Cavity Enhanced Absorption Spectroscopy

Applying CEAS method to UV, VIS, and IR spectroscopy sensors

2011 ◽  
Vol 59 (4) ◽  
pp. 415-418 ◽  
Author(s):  
J. Wojtas ◽  
J. Mikolajczyk ◽  
M. Nowakowski ◽  
B. Rutecka ◽  
R. Medrzycki ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Ir Spectroscopy ◽  
High Precision ◽  
Absorption Spectroscopy ◽  
Mid Infrared ◽  
Measure Concentration ◽  
Enhanced Absorption ◽  
Cavity Enhanced Absorption Spectroscopy ◽  
The Cost ◽  
Detection Of Explosives

Applying CEAS method to UV, VIS, and IR spectroscopy sensorsIn the paper, several applications of Cavity Enhanced Absorption Spectroscopy (CEAS) for trace mater detection are described. NO2sensor was constructed using this technique with blue-violet lasers (395-440 nm). The sensor sensitivity reaches the level of single ppb and it was applied in security portal. For detection of two gases at the same time, two-channel sensor was constructed. Used method allows a significant reduction in the cost of optoelectronic CEAS sensor designed to measure of concentrations of many gases simultaneously. Successful monitoring of N2O and NO in the air requires high precision mid-infrared spectroscopy. The constructed sensors are able to measure concentration at ppb level. These sensors might be used for monitoring of atmospheric purity as well as for detection of explosives.

On-chip cavity-enhanced absorption spectroscopy using a white light-emitting diode and polymer mirrors

Lab on a Chip ◽  
2015 ◽  
Vol 15 (3) ◽  
pp. 711-717 ◽  
Author(s):  
Cathy M. Rushworth ◽  
Gareth Jones ◽  
Martin Fischlechner ◽  
Emma Walton ◽  
Hywel Morgan
Keyword(s):  
Absorption Spectroscopy ◽  
White Light ◽  
Microfluidic Chip ◽  
Path Length ◽  
Light Emitting Diode ◽  
Absorption Path Length ◽  
Light Emitting ◽  
Enhanced Absorption ◽  
Cavity Enhanced Absorption Spectroscopy ◽  
On Chip

We have integrated disposable polymer mirrors within a microfluidic chip to form a multi-pass cell, which increases the absorption path length by a maximum of 28 times, providing micromolar detection limits in a probed volume of 10 nL.

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