The use of on-chip nonlinear waveguides that can convert 1.5-μm wavelength signals into the 2-μm region brings new opportunities for expanding the bandwidth of optical communications.
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Direct bandgap emission from strain-doped germanium
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Gunning, F., Corbett, B. Spectral translation unlocks 2-μm window. Nat. Photon. 16, 744–745 (2022). https://doi.org/10.1038/s41566-022-01090-z
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DOI: https://doi.org/10.1038/s41566-022-01090-z
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Direct bandgap emission from strain-doped germanium
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