PORTABLE MICROFLUIDIC DEVICE FOR DETECTING NITRITE-NITRATE

    公开(公告)号:US20190271675A1

    公开(公告)日:2019-09-05

    申请号:US16345001

    申请日:2017-10-26

    摘要: An ion gel including a hydrogel in an ionic liquid, and a reactive system that changes colour upon reaction with the nitrite and a microfluidic device having a substrate with calibration reservoirs that are separated from one another and include an ion gel, a calibration reservoir of the hydrogel in the ionic liquid, a reservoir for holding a sample to be analysed, connected to a measuring reservoir including an ion gel via a microfluidic channel with a reducing agent, and a measuring reservoir including an ion gel of the invention where a sample to be analysed is held and methods for producing the ion gel and the device, as well as a method for colorimetrically determining and detecting nitrite and nitrate in contaminated water using the ion gel and the device.

    Composed multicore optical fiber device

    公开(公告)号:US11977254B2

    公开(公告)日:2024-05-07

    申请号:US17620187

    申请日:2020-06-24

    IPC分类号: G02B6/02 G01B11/16 G01D5/353

    摘要: A composed multicore optical fiber (MCF) device includes a first segment (MCF1) of a MCF having three coupled identical cores and having a first length (L1) and a second segment (MCF2) of the same MCF having a second length (L2). L1 and L2 are different from each other. One of the three coupled cores is located in a geometrical centre of the MCF. The first segment (MCF1) and the second segment (MCF2) of the MCF are rotated 180° relative to each other and spliced together. The first segment (MCF1) is spliced to a first segment (SMF1) of a single mode fiber (SMF) and the second segment (MCF2) is spliced to a second segment (SMF2) of the SMF. The free end of the second segment (SMF2) of the SMF is coupled to a mirror (M) to reflect an optical signal coming from the first segment (SMF1) of the SMF.

    COMPOSED MULTICORE OPTICAL FIBER DEVICE

    公开(公告)号:US20220342145A1

    公开(公告)日:2022-10-27

    申请号:US17620187

    申请日:2020-06-24

    IPC分类号: G02B6/02 G01B11/16 G01D5/353

    摘要: A composed multicore optical fiber (MCF) device includes a first segment (MCF1) of a MCF having three coupled identical cores and having a first length (L1) and a second segment (MCF2) of the same MCF having a second length (L2). L1 and L2 are different from each other. One of the three coupled cores is located in a geometrical centre of the MCF. The first segment (MCF1) and the second segment (MCF2) of the MCF are rotated 180° relative to each other and spliced together. The first segment (MCF1) is spliced to a first segment (SMF1) of a single mode fiber (SMF) and the second segment (MCF2) is spliced to a second segment (SMF2) of the SMF. The free end of the second segment (SMF2) of the SMF is coupled to a mirror (M) to reflect an optical signal coming from the first segment (SMF1) of the SMF.