Journal
NATURE COMMUNICATIONS
Volume 8, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms13922
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Funding
- Defense Advanced Research Projects Agency (DARPA) under PULSE program [W31P4Q-14-1-0001]
- Defense Advanced Research Projects Agency (DARPA) under QuASAR program [W911NF-14-1-0284]
- National Aeronautics and Space Administration (NASA) [KJV.JPLNASA-1-JPL. 1459106]
- Kavli Nanoscience Institute
- Institute for Quantum Information and Matter, a National Science Foundation (NSF) Physics Frontiers Center [PHY-1125565]
- Gordon and Betty Moore Foundation, NIST
- National Science Foundation [AST-1310875]
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Short duration, intense pulses of light can experience dramatic spectral broadening when propagating through lengths of optical fibre. This continuum generation process is caused by a combination of nonlinear optical effects including the formation of dispersive waves. Optical analogues of Cherenkov radiation, these waves allow a pulse to radiate power into a distant spectral region. In this work, efficient and coherent dispersive wave generation of visible to ultraviolet light is demonstrated in silica waveguides on a silicon chip. Unlike fibre broadeners, the arrays provide a wide range of emission wavelength choices on a single, compact chip. This new capability is used to simplify offset frequency measurements of a mode-locked frequency comb. The arrays can also enable mode-locked lasers to attain unprecedented tunable spectral reach for spectroscopy, bioimaging, tomography and metrology.
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