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EPFL has achieved a significant milestone in integrated photonics by miniaturizing a high-energy femtosecond laser onto a millimeter-scale chip, matching the performance of traditional table-top systems for the first time. This breakthrough, enabled by a previously overlooked Mamyshev oscillator architecture, validates a long-standing goal in the field and paves the way for cost-effective precision tools in sensing and metrology. The development demonstrates that complex ultrafast laser systems can now be integrated without requiring bulky optical tables, potentially reshaping applications from medical diagnostics to optical atomic clocks.
EPFL Chip Laser Matches High-Energy Pulses

EPFL’s new photonic chip contains an ultrafast laser that delivers 1.05 nanojoules in 147 femtosecond pulses, rivaling larger lab setups.
Researchers at EPFL have created a photonic chip that generates optical pulses rivaling those of much larger, laboratory-based lasers, delivering 1.05 nanojoules of energy in just 147 femtoseconds. The device shrinks a complex laser system, previously confined to optical tables, to the size of a millimeter, visually demonstrated by placing it on a 1 CHF coin. Publishing in Nature, the team led by Professor Tobias J. Kippenberg reports the first…
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