1â
GHz electro-optical silicon-germanium modulator in the 5-9 µm wavelength range.
Opt Express
; 30(26): 47093-47102, 2022 Dec 19.
Article
em En
| MEDLINE
| ID: mdl-36558646
ABSTRACT
Spectroscopy in the mid-infrared (mid-IR) wavelength range is a key technique to detect and identify chemical and biological substances. In this context, the development of integrated optics systems paves the way for the realization of compact and cost-effective sensing systems. Among the required devices, an integrated electro-optical modulator (EOM) is a key element for advanced sensing circuits exploiting dual comb spectroscopy. In this paper, we have experimentally demonstrated an integrated EOM operating in a wide wavelength range, i.e. from 5 to 9 µm at radio frequency (RF) as high as 1â
GHz. The modulator exploits the variation of free carrier absorption in a Schottky diode embedded in a graded silicon germanium (SiGe) photonic waveguide.
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MEDLINE
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En
Ano de publicação:
2022
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Article