SURFACE-COUPLED INTEGRATED-CAVITY SEMICONDUCTOR LASER

    公开(公告)号:US20240348015A1

    公开(公告)日:2024-10-17

    申请号:US18612461

    申请日:2024-03-21

    CPC classification number: H01S5/18327 H01S5/041 H01S5/2018

    Abstract: A device including a chip including a photonic integrated circuit comprising an external cavity for a source of electromagnetic radiation; the source of electromagnetic radiation attached to a top surface of the chip, the source comprising a semiconductor active region comprising, or coupled to, an output for the electromagnetic radiation, wherein the output is oriented to emit the electromagnetic radiation into the top surface in an emission direction that is inclined with respect to a plane of propagation of the electromagnetic radiation in the external cavity; and a coupler coupling the active region to the external cavity via the top surface to integrate the external cavity with the active region. The coupler partially couples the electromagnetic radiation outputted from the active region to the external cavity, and feedback from the external cavity to the active region.

    Ultrasound measurement device
    36.
    发明授权

    公开(公告)号:US12102477B2

    公开(公告)日:2024-10-01

    申请号:US18128998

    申请日:2023-03-30

    Abstract: An ultrasound measurement device includes: a processing device and multiple ultrasound sensors that capture tomographic information of a physiological structure. The ultrasound sensors include a first ultrasound sensor including a first transducer having a first frequency response with a first resonant frequency, and a second ultrasound sensor including a second transducer having a second frequency response with a second resonant frequency different from the first resonant frequency. The first frequency response partially overlaps with the second frequency response. The second transducer transmits an ultrasound signal that is reflected by the physiological structure to create a reflected ultrasound signal, the first transducer generates a first received signal from the reflected ultrasound signal, the second transducer generates a second received signal from the reflected ultrasound signal, and the processing device normalizes the first received signal with the second received signal or the second received signal with the first received signal.

Patent Agency Ranking