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    DIFFERENTIAL TWE MZM DRIVER FOR SILICON PHOTONICS
    2.
    发明授权
    DIFFERENTIAL TWE MZM DRIVER FOR SILICON PHOTONICS 有权

    公开(公告)号：EP3198336B1

    公开(公告)日：2018-10-31

    申请号：EP15777789.7

    申请日：2015-09-23

    Applicant: Finisar Corporation

    Inventor： DENOYER, Gilles, P.

    IPC: G02F1/225 ,  H04B10/556

    CPC classification number: G02F1/2255 ,  G02B6/14 ,  G02F1/2257 ,  G02F2001/212 ,  G02F2201/126 ,  H04B10/556

    Abstract: A differential TWE MZM includes a differential driver, first and second capacitors, and first and second terminations. The differential driver includes a first differential output and a second differential output that collectively form a differential pair. The first differential output is DC coupled to a cathode of a first arm optical phase shifter of a TWE MZM. The second differential output is DC coupled to a cathode of a second arm optical phase shifter of the TWE MZM. The first capacitor AC couples the second differential output to an anode of the first arm optical phase shifter. The second capacitor AC couples the first differential output to an anode of the second arm optical phase shifter. The first and second terminations are coupled to the cathode and the anode of, respectively, the first or second arm optical phase shifter.

    OPTICAL MODULATOR
    3.
    发明公开
    OPTICAL MODULATOR 审中-公开

    公开(公告)号：EP3333619A1

    公开(公告)日：2018-06-13

    申请号：EP16832526.4

    申请日：2016-08-03

    Applicant: Nippon Telegraph And Telephone Corporation

    Inventor： TSUZUKI, Ken ,  SAIDA, Takashi ,  TAKEDA, Koutaro ,  HONDA, Kentaro

    IPC: G02F1/025 ,  G02F1/225

    CPC classification number: G02F1/025 ,  G02F1/225 ,  G02F1/2255 ,  G02F2001/212 ,  G02F2203/50

    Abstract: An optical modulator is provided that suppresses the chirp due to the mask offset for example during the phase modulation and that provides a high waveform quality. An optical modulator is provided that includes: two RF electrodes for applying one pair of differential signal voltages; at least one fixed potential electrodes for applying a fixed potential; a first conductive semiconductor layer and a second conductive semiconductor layer abutted to the RF electrode or a fixed potential electrode; and a light modulation unit including two optical waveguides branched from one optical waveguide that are arranged along a pn junction unit functioning as a boundary between the first and second conductive semiconductor layers, wherein: the semiconductor layers and the electrode are provided so that the integration amounts of the phase changes caused by the offsets of the positions of the pn junction units in the two optical waveguides from a design value is equal between the two optical waveguides.

    MACH-ZEHNDER MODULATOR ARRANGEMENT AND METHOD FOR OPERATING A MACH-ZEHNDER MODULATOR ARRANGEMENT
    6.
    发明公开
    MACH-ZEHNDER MODULATOR ARRANGEMENT AND METHOD FOR OPERATING A MACH-ZEHNDER MODULATOR ARRANGEMENT 审中-公开
    MACH-ZEHNDER-MODULATORANORDNUNG UND VERFAHRENFÜRDEN BETRIEB EINER MACH-ZEHNDER-MODULATORANORDNUNG

    公开(公告)号：EP3079007A1

    公开(公告)日：2016-10-12

    申请号：EP16171962.0

    申请日：2012-01-12

    Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    Inventor： VELTHAUS, Karl-Otto

    IPC: G02F1/225 ,  G02F1/25 ,  G02F1/21

    CPC classification number: G02F1/2257 ,  G02F1/0121 ,  G02F1/225 ,  G02F1/2255 ,  G02F1/25 ,  G02F2001/212 ,  G02F2201/126

    Abstract: The invention relates to An electro-optic Mach-Zehnder modulator arrangement, comprising a plurality of first waveguide electrodes (210) and a plurality of second waveguide electrodes (220) arranged on top of capacitive segments (1110, 1210) of the first and the second optical waveguide (11, 12); a plurality of driver units (410) for supplying a voltage (V) to the electrode arrangement (2), each one of the driver unit (410) comprising at least a first output port (4410) coupled to one of the first waveguide electrodes (210) and a second output port (4420) coupled to one of the second waveguide electrodes (220); a non-grounded conductive region (30) via which the capacitive segment (1110) of the first optical waveguide (11) is connected to the capacitive segment (1210) of the second optical waveguide (12); and a DC-source (6) connected to the first and/or the second waveguide electrodes (210, 220) and the conductive region (30) for supplying a bias voltage (V bias ) across the capacitive segments (1110, 1210) of the optical waveguides (11, 12). According to the invention, each one of the driver units (41) is configured to supply a first varying signal (S+) to the first waveguide electrode (21) via the first output port (441) and to supply a second varying signal (S-) to the second waveguide electrode (22) via the second output port (442), wherein each one of the driver units (410) is a differential driver unit assigned to one first waveguide electrode (210) and one second waveguide electrode (220), and wherein the DC-source (6) is connected to the conductive region (30) and ground.

    Abstract translation: 本发明涉及一种电光马赫曾德尔调制器装置，其包括多个第一波导电极（210）和多个第二波导电极（220），其布置在第一和第二波导电极的电容段（1110,1210）的顶部， 第二光波导（11,12）; 用于向电极装置（2）提供电压（V）的多个驱动器单元（410），驱动器单元（410）中的每一个包括至少第一输出端口（4410），第一输出端口（4410）耦合到第一波导电极 （210）和耦合到所述第二波导电极（220）之一的第二输出端口（4420）; 非接地导电区域（30），所述第一光波导（11）的电容段（1110）经由所述非接地导电区域连接到所述第二光波导（12）的电容段（1210）。 以及连接到第一和/或第二波导电极（210,220）和导电区域（30）的DC源（6），用于提供横跨电容段（1110,1210）的电压段（1110,1210）的偏压（V bias） 光波导（11,12）。 根据本发明，驱动器单元（41）中的每一个被配置为经由第一输出端口（441）向第一波导电极（21）提供第一变化信号（S +），并且提供第二变化信号（S + - ）经由第二输出端口（442）耦合到第二波导电极（22），其中每个驱动器单元（410）是分配给一个第一波导电极（210）和一个第二波导电极（220）的差分驱动器单元 ），并且其中所述DC源（6）连接到所述导电区域（30）并接地。

    CONTROLLING BIAS VOLTAGES FOR OPTICAL MODULATORS
    7.
    发明授权
    CONTROLLING BIAS VOLTAGES FOR OPTICAL MODULATORS 有权
    方法控制光调制器偏置

    公开(公告)号：EP2845049B1

    公开(公告)日：2016-04-27

    申请号：EP13720510.0

    申请日：2013-04-30

    Applicant: BAE Systems PLC

    Inventor： SMITH, Andrew James ,  NAWAZ, Mohammed

    IPC: G02F1/01 ,  G02F1/225 ,  H04B10/50

    CPC classification number: G02F1/0123 ,  G02F1/225 ,  G02F1/2255 ,  G02F2001/212 ,  H04B10/50575 ,  H04B10/50595

    Abstract: Methods and apparatus for controlling a bias voltage (20) supplied to an optical modulator that comprises a biasable component configurable to be biased by application of the bias voltage (20), the method comprising: providing a target for the modulator output power; applying, to the biasable component, a bias voltage (20) that biases the biasable component so that the output power is within a pre-defined range of the target; monitoring the output power and, if the output power of the modulator is determined to be outside the pre-defined range, varying the value of the bias voltage (20) to bring the output power back within the pre-defined range; and monitoring the optical input to the modulator and, if it has been disabled, maintaining the bias voltage (20) at its current level for a pre-determined length of time that is dependent upon how long the modulator has been operating at quadrature.

    Electro-optical modulator based on carrier depletion or carrier accumulation in semiconductors with advanced electrode configuration
    9.
    发明公开
    Electro-optical modulator based on carrier depletion or carrier accumulation in semiconductors with advanced electrode configuration 有权
    基于Trägerabreicherung或载流子积累在具有改进的电极结构的半导体电光调制器

    公开(公告)号：EP2775343A3

    公开(公告)日：2016-02-24

    申请号：EP14157000.2

    申请日：2014-02-27

    Applicant: RWTH Aachen University

    Inventor： Witzens, Jeremy, Prof. Dr. ,  Merget, Florian, Dr.

    IPC: G02F1/015 ,  G02F1/025 ,  G02F1/01 ,  G02F1/225 ,  H04B10/50

    CPC classification number: G02F1/2255 ,  G02F1/0121 ,  G02F1/025 ,  G02F1/2257 ,  G02F2001/0152 ,  H04B10/505

    Abstract: An electro-optical modulator (1) is proposed to have two electrodes (33, 35) being part of a transmission line (19) of a first phase modulator and further two electrodes (37, 39) being part of a transmission line (19) of a second phase modulator included in two arm of a Mach-Zehnder-interferometer. Each transmission line (19) comprises a pn-diode (41, 43) or a semiconductor-isolator-semiconductor capacitor. Furthermore, an electrical controller (17) is adapted for applying first electrical high-frequency-modulated voltage signals Sig1(t) between the first and second electrodes (33, 35) and for applying second electrical high-frequency-modulated signals Sig2(t) between the fourth and third electrodes (39, 37). However, a DC component of these signals Sig1(t) and Sig2(t) and a polarity with which these signals are applied to the first and second diodes (41, 43) or to the first and second semiconductor-insulator-semiconductor capacitor principally differ in comparison to conventional approaches in that the electrical controller (17) shall apply signals such that voltages applied to the first and fourth electrodes (33, 39) have substantially a same high-frequency content, and the voltages applied to the second and third electrodes (35, 37) have substantially the same high-frequency content. In such configuration, either the voltages applied to the first and fourth electrodes (33, 39) differ by a constant voltage offset, or, alternatively, the voltages applied to the second and third electrodes (35, 37) differ by a constant voltage offset. Thereby, cross-talk between electrodes and electrical losses as well as device size and fabrication costs may be reduced.

    OPTICAL TRANSMITTER AND METHOD FOR CONTROLLING BIAS OF OPTICAL MODULATOR
    10.
    发明公开
    OPTICAL TRANSMITTER AND METHOD FOR CONTROLLING BIAS OF OPTICAL MODULATOR 有权
    光发射机和一种用于控制光调制器的偏置

    公开(公告)号：EP2981005A1

    公开(公告)日：2016-02-03

    申请号：EP15171377.3

    申请日：2015-06-10

    Applicant: FUJITSU LIMITED

    Inventor： Nakashima, Hisao ,  Hoshida, Takeshi ,  Akiyama, Yuichi

    IPC: H04B10/50 ,  G02F1/01

    CPC classification number: H04B10/5563 ,  G02F1/0123 ,  G02F1/2255 ,  G02F2001/212 ,  H04B10/50575

    Abstract: An optical transmitter includes: a mapper (31) that generates an electric field information signal from transmission data; a phase rotation circuit (33) that adds a phase rotation to the electric field information signal; a driver (13a-13d) that generates a driving signal from the electric field information signal to which the phase rotation is added; a modulator (15x, 15y) that generates a modulated optical signal according to the driving signal; and a controller (52) that controls a bias of the modulator according to a change in a carrier frequency of the modulated optical signal corresponding to the phase rotation that is added to the electric field information signal by the phase rotation circuit.

    Abstract translation: 一种光发射机包括：映射器（31），其生成从发送数据电场信息信号; 相位旋转电路（33）没有增加的相位旋转，以电场信息信号; 驱动器（13A-13D）做基因率从向其中添加了相位旋转的电场信息信号的驱动信号; 一个调制器（15倍，15Y）那样生成调制光信号速率gemäß于驱动信号; 和控制器（52）那样控制调制器gemäß的偏置到在所述调制光信号对应于相位旋转的载波频率的变化也被添加到由相位旋转电路的电场的信息信号。

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