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    Hybrid Approach Gives Microcombs Ultralow Power, Fast Actuation for Lidar and Other Uses

    Article obtained from Photonics RSS Feed.

    Researchers at École Polytechnique Fédérale de Lausanne (EPFL) and Purdue University demonstrated a hybrid approach to on-chip acousto-optic modulation by combining piezoelectric aluminium nitride technology with ultralow-loss silicon nitride integrated photonics.

    The hybrid circuit allows wideband actuation on photonic waveguides with ultralow electrical power. A key feature is that it maintains the ultralow loss of silicon nitride circuits. Silicon nitride has emerged as a leading material for chip-scale, microresonator-based optical frequency combs (microcombs).

    The researchers integrated microelectromechanical systems (MEMS) transducers made of aluminum nitride with a silicon photonic wafer to modulate…

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    Jul, 23 2020 |

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