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Mid-infrared octave spanning supercontinuum generation to 8.5 μm in silicon-germanium waveguides

Abstract : Efficient on-chip molecule and bio-agent detection can be achieved by accessing strong molecular absorption lines in the mid-infrared, but it requires high output power broadband mid-IR sources. Here, we report supercontinuum generation in an air-clad $Si_{0.6}$$Ge_{0.4}$/Si waveguide that emits a broad spectrum spanning from 3.0 μm to 8.5 μm. These waveguides have anomalous dispersion and low propagation loss (<0.4  dB/cm) in the mid-IR, which leads to a supercontinuum output with a high average power of more than 10 mW on-chip. The realization of broadband mid-IR sources with high spectral brightness makes the SiGe-on-Si platform promising for a wide range of applications.
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https://hal.archives-ouvertes.fr/hal-01958206
Contributor : Christelle Monat Connect in order to contact the contributor
Submitted on : Thursday, September 9, 2021 - 4:25:58 PM
Last modification on : Friday, September 10, 2021 - 11:32:14 AM

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Milan Sinobad, Christelle Monat, Barry Luther-Davies, Pan Ma, Stephen Madden, et al.. Mid-infrared octave spanning supercontinuum generation to 8.5 μm in silicon-germanium waveguides. Optica, Optical Society of America - OSA Publishing, 2018, 5 (4), pp.360. ⟨10.1364/OPTICA.5.000360⟩. ⟨hal-01958206⟩

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