Ytterbium-doped aluminum oxide photonic platform achieves single-mode lasing, >0.5 W amplification at >70% efficiency and 3.3 dB noise figure, 14 kW peak-power femtosecond pulses, and visible supercontinuum generation from 780 to 476 nm.
T.et al.An optical-frequency synthesizer using integrated photonics.Nature557, 81–85 (2018)
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A lithographically programmed meta-coupler in Si3N4 resonators concentrates pump coupling while preserving low loss for other comb lines, yielding nearly 2x wider 3 dB bandwidth and up to 5x more emitted comb power.
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Integrated ytterbium gain for visible-near-infrared photonics
Ytterbium-doped aluminum oxide photonic platform achieves single-mode lasing, >0.5 W amplification at >70% efficiency and 3.3 dB noise figure, 14 kW peak-power femtosecond pulses, and visible supercontinuum generation from 780 to 476 nm.
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Program gain and loss for broadband soliton microcombs
A lithographically programmed meta-coupler in Si3N4 resonators concentrates pump coupling while preserving low loss for other comb lines, yielding nearly 2x wider 3 dB bandwidth and up to 5x more emitted comb power.