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    LIGHT DETECTION DEVICE
    4.
    发明公开
    LIGHT DETECTION DEVICE 审中-实审

    公开(公告)号：EP4350430A2

    公开(公告)日：2024-04-10

    申请号：EP24159648.5

    申请日：2017-03-03

    申请人： Hamamatsu Photonics K.K.

    发明人： HIROSE, Masaki ,  SHIBAYAMA, Katsumi ,  KASAHARA, Takashi ,  KAWAI, Toshimitsu ,  OYAMA, Hiroki

    IPC分类号： G02F1/21

    摘要： A light detection device includes a Fabry-Perot interference filter provided with a light transmitting region on a predetermined line, a light detector disposed on one side with respect to the Fabry-Perot interference filter on the line, a package having an opening positioned on the other side with respect to the Fabry-Perot interference filter on the line, a light transmitting member provided in the package such that the opening is blocked, and a temperature control element having an endothermic region thermally connected to the Fabry-Perot interference filter and the light detector. The endothermic region is positioned on one side with respect to the light detector on the line.

    A VARIABLE OPTICAL ATTENUATOR
    5.
    发明公开
    A VARIABLE OPTICAL ATTENUATOR 审中-公开

    公开(公告)号：EP4325285A1

    公开(公告)日：2024-02-21

    申请号：EP22190962.5

    申请日：2022-08-18

    申请人： Accelink Denmark A/S

    发明人： GERSBORG-HANSEN, Morten ,  CARDI, Lorenzo ,  ZAUNER, Dan Anker ,  SHEN, Yueqiang

    IPC分类号： G02F1/21 ,  G02F1/225

    摘要： The invention relates to a variable optical attenuator. The variable optical attenuator (100) comprises a planar lightwave circuit comprising a waveguide embedded in a cladding layer supported on a silica-on-silicon substrate (176), the lightwave circuit comprising a Mach-Zehnder interferometer comprising an optical waveguide (101) comprising first and second optical components (102, 103), at least two waveguide branches (110a, 110b) comprising first and second waveguide extensions (111a, 111b). The first optical component is arranged to divide input light into the at least two waveguide branches and the second optical component is arranged to combine light from the at least two waveguide branches. The attenuator further comprises first and second heating elements (121a, 121b) arranged to heat the first and second waveguide extensions, a center recess structure (130) comprising one or more recesses formed in the silica-on-silicon substrate. A first distance (D1) separating the first optical component and the nearest recess edge of the center recess structure is greater than 1000 µm.

    TRIMMING OF OPTICAL RESPONSE FOR TUNABLE PHOTONIC DEVICES
    9.
    发明公开
    TRIMMING OF OPTICAL RESPONSE FOR TUNABLE PHOTONIC DEVICES 审中-公开

    公开(公告)号：EP4242741A1

    公开(公告)日：2023-09-13

    申请号：EP23158690.0

    申请日：2023-02-27

    申请人： II-VI Delaware, Inc.

    发明人： DONG, Po ,  MELIKYAN, Argishti

    IPC分类号： G02F1/21 ,  G02F1/35 ,  G02B6/12 ,  G02F1/225

    摘要： An optoelectronic circuit used with signal light comprises photonic devices disposed on a platform. The photonic devices are configured to condition the signal light and are fabricated with an optical characteristic being electronically tunable. A fabricated performance of the optical characteristic can be varied from a target performance due to a difference (e.g., alteration, change, error, or discrepancy) in the process used to fabricate the device. A ground bus, a power bus, and banks of electronic components are disposed on the platform in electrical communication with the photonic devices. The electronic components in a given bank are selectively configurable to tune the optical characteristic of the associated device so a variance can be diminished between the fabrication and target performances of the device's optical characteristic due to the difference in the fabrication process.