Scientists show that it is possible to make a femtosecond laser that fits in the palm of one's hand using a glass substrate.
Is it possible to make a femtosecond laser entirely out of glass? That's the rabbit hole that Yves Bellouard, head of EPFL's Galatea Laboratory, went down after years of spending hours -- and hours -- aligning femtosecond lasers for lab experiments.
Bellouard and his team's solution? Use a commercial femtosecond laser to make a femtosecond laser out of glass, no bigger than the size of a credit card, and with less alignment hassles. The results are published in the journalTo make a femtosecond laser using a glass substrate, the scientists start with a sheet of glass.
"This approach to permanently align free-space optical components thanks to laser-matter interaction can be expanded to a broad variety of optical circuits, with extreme alignment resolutions, down to sub-nanometers," says Bellouard.Ongoing research programs at the Galatea Lab will explore the use of this technology in the context of quantum optical system assembly, pushing the limit of currently achievable miniaturization and alignment accuracy.
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