Textbooks suggest that heating, caused by phonon emission, is an inevitable and intrinsic by-product of light generation in a Raman laser. Now a design has emerged that reduces the phonon emission and may lead to higher efficiency and smaller devices.
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References
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Jalali, B. A cooler Raman laser. Nature Photon 1, 691–692 (2007). https://doi.org/10.1038/nphoton.2007.240
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DOI: https://doi.org/10.1038/nphoton.2007.240
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