Micro-Ring Resonator Assisted Photothermal Spectroscopy of Water Vapor.
Sensors (Basel)
; 24(11)2024 Jun 06.
Article
em En
| MEDLINE
| ID: mdl-38894468
ABSTRACT
We demonstrated, for the first time, micro-ring resonator assisted photothermal spectroscopy measurement of a gas phase sample. The experiment used a telecoms wavelength probe laser that was coupled to a silicon nitride photonic integrated circuit using a fibre array. We excited the photothermal effect in the water vapor above the micro-ring using a 1395 nm diode laser. We measured the 1f and 2f wavelength modulation response versus excitation laser wavelength and verified the power scaling behaviour of the signal.
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MEDLINE
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En
Ano de publicação:
2024
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Article