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    TWO-DIMENSIONAL GRATING COUPLER AND METHODS OF MAKING SAME
    41.
    发明公开
    TWO-DIMENSIONAL GRATING COUPLER AND METHODS OF MAKING SAME 审中-公开

    公开(公告)号：US20240361533A1

    公开(公告)日：2024-10-31

    申请号：US18769241

    申请日：2024-07-10

    Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

    Inventor： Chih-Tsung SHIH ,  Chewn-Pu JOU ,  Stefan RUSU ,  Felix Ying-Kit TSUI ,  Lan-Chou CHO

    IPC: G02B6/34 ,  G02B6/30

    CPC classification number: G02B6/34 ,  G02B6/305

    Abstract: Disclosed are apparatus and methods for optical coupling. In one example, a method for forming an optical coupler, includes: forming an insulation layer on a semiconductor substrate; epitaxially growing a semiconductor material on the insulation layer to form a semiconductor layer; etching, according to a predetermined pattern, the semiconductor layer to form: an array of etched holes in the semiconductor layer to form a grating region, a first taper structure extending from a first side of the grating region, wherein a shape of the first taper structure in the semiconductor layer is a first triangle that is asymmetric about any line perpendicular to the first side of the grating region, and a second taper structure extending from a second side of the grating region, wherein a shape of the second taper structure in the semiconductor layer is a second triangle that is asymmetric about any line perpendicular to the second side of the grating region, wherein the first side and the second side are substantially perpendicular to each other; and depositing a dielectric material into the array of etched regions to form an array of scattering elements in the semiconductor layer, wherein the scattering elements are arranged to form a two-dimensional (2D) grating.

    MULTI-TIP OPTICAL COUPLING DEVICES
    43.
    发明申请
    MULTI-TIP OPTICAL COUPLING DEVICES 有权

    公开(公告)号：US20220155524A1

    公开(公告)日：2022-05-19

    申请号：US17097270

    申请日：2020-11-13

    Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

    Inventor： Weiwei SONG ,  Chan-Hong CHERN ,  Chewn-Pu JOU ,  Stefan RUSU ,  Min-Hsiang HSU

    IPC: G02B6/26 ,  G02B6/30

    Abstract: An optical system with different optical coupling device configurations and a method of fabricating the same are disclosed. An optical system includes a substrate, a waveguide disposed on the substrate, an optical fiber optically coupled to the waveguide, and an optical coupling device disposed between the optical fiber and the waveguide. The optical coupling device configured to optically couple the optical fiber to the waveguide. The optical coupling device includes a dielectric layer disposed on the substrate, a semiconductor tapered structure disposed in a first horizontal plane within the dielectric layer, and a multi-tip dielectric structure disposed in a second horizontal plane within the dielectric layer. The first and second horizontal planes are different from each other

    APPARATUS, CIRCUITS AND METHODS FOR REDUCING MISMATCH IN AN ELECTRO-OPTIC MODULATOR
    44.
    发明申请
    APPARATUS, CIRCUITS AND METHODS FOR REDUCING MISMATCH IN AN ELECTRO-OPTIC MODULATOR 有权

    公开(公告)号：US20220035223A1

    公开(公告)日：2022-02-03

    申请号：US17503095

    申请日：2021-10-15

    Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

    Inventor： Lan-Chou CHO ,  Chewn-Pu JOU ,  Min-Hsiang HSU

    IPC: G02F1/225

    Abstract: Apparatus, circuits and methods for reducing mismatch in an electro-optic modulator are described herein. In some embodiments, a described optical includes: a splitter configured for splitting an input optical signal into a first optical signal and a second optical signal; a phase shifter coupled to the splitter; and a combiner coupled to the phase shifter. The phase shifter includes: a first waveguide arm configured for controlling a first phase of the first optical signal to generate a first phase-controlled optical signal, and a second waveguide arm configured for controlling a second phase of the second optical signal to generate a second phase-controlled optical signal. Each of the first and second waveguide arms includes: a plurality of straight segments and a plurality of curved segments. The combiner is configured for combining the first and second phase-controlled optical signals to generate an output optical signal.

    APPARATUS, CIRCUITS AND METHODS FOR REDUCING MISMATCH IN AN ELECTRO-OPTIC MODULATOR
    45.
    发明申请
    APPARATUS, CIRCUITS AND METHODS FOR REDUCING MISMATCH IN AN ELECTRO-OPTIC MODULATOR 有权

    公开(公告)号：US20210271147A1

    公开(公告)日：2021-09-02

    申请号：US16804522

    申请日：2020-02-28

    Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

    Inventor： Lan-Chou CHO ,  Chewn-Pu JOU ,  Min-Hsiang HSU

    IPC: G02F1/225

    Abstract: Apparatus, circuits and methods for reducing mismatch in an electro-optic modulator are described herein. In some embodiments, a described optical includes: a splitter configured for splitting an input optical signal into a first optical signal and a second optical signal; a phase shifter coupled to the splitter; and a combiner coupled to the phase shifter. The phase shifter includes: a first waveguide arm configured for controlling a first phase of the first optical signal to generate a first phase-controlled optical signal, and a second waveguide arm configured for controlling a second phase of the second optical signal to generate a second phase-controlled optical signal. Each of the first and second waveguide arms includes: a plurality of straight segments and a plurality of curved segments. The combiner is configured for combining the first and second phase-controlled optical signals to generate an output optical signal.

    ALL-DIGITAL PHASE LOCKED LOOP USING SWITCHED CAPACITOR VOLTAGE DOUBLER
    47.
    发明申请
    ALL-DIGITAL PHASE LOCKED LOOP USING SWITCHED CAPACITOR VOLTAGE DOUBLER 审中-公开

    公开(公告)号：US20190288692A1

    公开(公告)日：2019-09-19

    申请号：US16429774

    申请日：2019-06-03

    Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

    Inventor： Feng Wei KUO ,  Chewn-Pu JOU ,  Huan-Neng CHEN ,  Lan-Chou CHO ,  Robert Bogdan STASZEWSKI ,  Seyednaser POURMOUSAVIAN

    IPC: H03L1/00 ,  H03L7/099 ,  H03L7/093 ,  H03L7/08

    Abstract: An all-digital phase locked loop (ADPLL) receives an analog input supply voltage which is utilized to operate analog circuitry within the ADPLL. The ADPLL of the present disclosure scales this analog input supply voltage to provide a digital input supply voltage which is utilized to operate digital circuitry within the ADPLL. The analog circuitry includes a time-to-digital converter (TDC) to measure phase errors within the ADPLL. The TDC can be characterized as having a resolution of the TDC which is dependent, at least in part, upon the digital input supply voltage. In some situations, process, voltage, and/or temperature (PVT) variations within the ADPLL can cause the digital input supply voltage to fluctuate, which in turn, can cause fluctuations in the resolution of the TDC. These fluctuations in the resolution of the TDC can cause in-band phase noise of the ADPLL to vary across the PVT variations. The digital circuitry regulates the digital input supply voltage to stabilize the resolution of the TDC across the PVT variations. This stabilization of the resolution of the TDC can cause the ADPLL to maintain a fixed in-band phase noise across the PVT variations.

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