Erbium Doped Glass For Optical Amplification In Detecting A Photoplethysmography

    公开(公告)号:US20220087557A1

    公开(公告)日:2022-03-24

    申请号:US17296118

    申请日:2020-05-22

    申请人: Google LLC

    发明人: Yogesh Verma

    摘要: A user device for monitoring a physical condition of a user, such as a heart rate or blood oxygen level, includes an erbium doped glass component and a light source. The light source is configured to generate light equal to an excitation frequency of the erbium doped glass. The erbium doped glass component is configured to generate, through photoluminescence, one or more peaks of higher intensity light corresponding to a wavelength which can be used to monitor a physical condition of a user. The amplified light is sent to the user and received back at a photodetector, which can then algorithmically determine a physical condition of a user.

    METHOD FOR PERFORMANCE PREDICTION OF GLASS SYSTEM

    公开(公告)号:US20210407628A1

    公开(公告)日:2021-12-30

    申请号:US16764406

    申请日:2019-07-25

    摘要: A method for performance prediction of a functional glass system, which includes the following steps: determining species of atoms for structural search according to components of a target glass system; performing structural search based on a first principle to search out compounds that can be formed by interaction between the atoms; comparing a formation energy and a phonon spectrum of each of the compounds to obtain stable compounds; constructing a glass structural composition diagram according to the stable compounds, microstructural units of a glassy compound adjacent to a target glass composition point are structural genes of the glass; and calculating a property of the target glass according to a leverage model formula of a multiplex glass system, the leverage model formula of the multiplex glass system being P0=Σi=1nPi×Li.