OPTICAL ISOLATOR INTEGRATED WITH OPTICAL DEVICES

    公开(公告)号:US20230273370A1

    公开(公告)日:2023-08-31

    申请号:US17866335

    申请日:2022-07-15

    Abstract: A device includes an optical isolator disposed between adjacent optical waveguides along a direction. The optical isolator has vertical or horizontal dimensions that are different than at least one of the optical waveguides. The vertical and horizontal dimensions are greater than vertical and horizontal dimensions of at least one of the waveguides. In various embodiments, the structure of the optical isolator can be a planar structure, a columnar periodic structure, or a grating structure. The material of the optical isolator can be a metallic material or a dielectric material. In some embodiments, the optical isolator and the optical waveguides are used to enhance the performance of an optical multiplexing device.

    PHASE-LOCKED LOOP CIRCUIT
    7.
    发明申请
    PHASE-LOCKED LOOP CIRCUIT 有权
    相位锁定环路

    公开(公告)号:US20150116018A1

    公开(公告)日:2015-04-30

    申请号:US14320168

    申请日:2014-06-30

    CPC classification number: H03L7/091 H03L7/085 H03L7/093 H03L7/0991 H03L2207/50

    Abstract: A phase-locked loop circuit, a phase converter module thereof and a phase-locked controlling method are disclosed herein. The phase converter module is suitable for a phase-locked loop circuit including a digitally-controlled oscillator (DCO) for generating an oscillator output signal and a divider for converting the oscillator output signal into N-phased oscillator output signals. The phase converter module includes a period extender, a phase finder and a time-to-digital converter. The period extender is configured for extending the N-phased oscillator output signals into M*N-phased oscillator output signals corresponding to M oscillation period of the digitally-controlled oscillator. The phase finder is configured for sampling the oscillator output signal with the M*N-phased oscillator output signals to calculate an estimated value of the fractional phase part. The time-to-digital converter is configured to calculate a precise value of the fractional phase part within one sub-period.

    Abstract translation: 本文公开了一种锁相环电路,其相变转换器模块和锁相控制方法。 相位转换器模块适用于包括用于产生振荡器输出信号的数字控制振荡器(DCO)和用于将振荡器输出信号转换成N相振荡器输出信号的分频器的锁相环电路。 相位转换器模块包括周期延长器,相位取样器和时间 - 数字转换器。 周期延长器被配置为将N相振荡器输出信号扩展到对应于数字控制振荡器的M个振荡周期的M * N个相位振荡器输出信号。 相位器被配置为用M * N相位振荡器输出信号对振荡器输出信号进行采样,以计算分数阶段的估计值。 时间 - 数字转换器被配置为计算一个子周期内的分数阶段的精确值。

    APPARATUS, CIRCUITS AND METHODS FOR REDUCING MISMATCH IN AN ELECTRO-OPTIC MODULATOR

    公开(公告)号:US20250060645A1

    公开(公告)日:2025-02-20

    申请号:US18936859

    申请日:2024-11-04

    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.

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