公开(公告)号：US07027669B2

公开(公告)日：2006-04-11

申请号：US10641414

申请日：2003-08-15

申请人： Juerg Leuthold ,  Xiang Liu ,  Xing Wei

发明人： Juerg Leuthold ,  Xiang Liu ,  Xing Wei

IPC分类号： G02F1/035

CPC分类号： H04B10/505 ,  G02F1/225 ,  G02F2201/126 ,  G02F2203/25 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/508

摘要： Systems and techniques for generating optical pulses exhibiting a progressive phase shift, and the use of those pulses to transmit data, are described. One embodiment of the invention employs a Mach-Zehnder modulator using electrical signals chosen to introduce a predetermined frequency shift at the center of each pulse generated by the pulse generator. This frequency shift is achieved by introducing a timing difference between the electrical input signals. Another embodiment of the invention employs a chirp free pulse generator and a separate phase modulator to induce the desired frequency or phase shift. These progressively phase shifted pulses may be further modulated to transmit data by introducing phase or amplitude modulation on the optical pulses, depending on the data to be transmitted.

摘要翻译： 描述了产生逐行相移的光脉冲的系统和技术，以及这些脉冲用于发送数据的用途。 本发明的一个实施例采用马赫曾德尔调制器，其使用所选择的电信号，以在由脉冲发生器产生的每个脉冲的中心处引入预定的频移。 通过引入电输入信号之间的定时差来实现该频移。 本发明的另一个实施例采用啁啾自由脉冲发生器和单独的相位调制器来诱导期望的频率或相移。 这些逐渐的相移脉冲可以被进一步调制以通过根据要发送的数据在光脉冲上引入相位或幅度调制来发送数据。

公开(公告)号：US07006769B1

公开(公告)日：2006-02-28

申请号：US09256079

申请日：1999-02-24

申请人： Yumiko Kawasaki ,  Kazuo Yamane ,  Takashi Tsuda ,  Satoru Okano

发明人： Yumiko Kawasaki ,  Kazuo Yamane ,  Takashi Tsuda ,  Satoru Okano

IPC分类号： H04B10/00 ,  H04B10/12

CPC分类号： H04B10/2525 ,  G02F1/0121 ,  G02F1/0123 ,  G02F2203/25 ,  H04B10/0775 ,  H04B10/07953 ,  H04B10/0799 ,  H04B2210/077 ,  H04B2210/252 ,  H04B2210/254

摘要： The invention, relates to a method for optical fiber communication. An optical signal having chirping determined by a chirp parameter is output to an optical fiber transmission line. The optical signal transmitted by the optical fiber transmission line is converted into an electrical signal. A bit error of the electrical signal is detected. Then, the chirp parameter is controlled so that the bit error detected above is reduced. According to this method, the chirp parameter is controlled so that the bit error detected is reduced. Accordingly, a chirping occurring in the optical fiber transmission line can be suppressed by the chirping of the optical signal to be output to the optical fiber transmission line, thereby compensating for chromatic dispersion and nonlinearity.

摘要翻译： 本发明涉及一种光纤通信方法。 将具有由啁啾参数确定的啁啾的光信号输出到光纤传输线。 由光纤传输线传输的光信号被转换为电信号。 检测到电信号的位错误。 然后，控制啁啾参数，使得上面检测到的位错误减少。 根据该方法，控制啁啾参数，使得检测到的位错误减少。 因此，可以通过对输出到光纤传输线的光信号的线性调频来抑制在光纤传输线中发生的线性调频，从而补偿色散和非线性。

公开(公告)号：US06778309B2

公开(公告)日：2004-08-17

申请号：US10226184

申请日：2002-08-22

申请人： Joseph Michael Freund ,  Thomas Gordon Beck Mason ,  Joseph Patrick Reynolds ,  Robert Ehrler Tench ,  Frank Stephen Walters

发明人： Joseph Michael Freund ,  Thomas Gordon Beck Mason ,  Joseph Patrick Reynolds ,  Robert Ehrler Tench ,  Frank Stephen Walters

IPC分类号： G02F103

CPC分类号： B82Y20/00 ,  G02F1/01708 ,  G02F2001/0157 ,  G02F2201/16 ,  G02F2203/25 ,  G02F2203/255

摘要： An electroabsorption modulator comprises a tandem arrangement of a conventional electroabsorption (EA) modulator element and a phase modulator element. The EA modulator element is driven by the digital data signal and the phase modulator is driven by a chirp tuning control signal, such as the complement of the data signal. By controlling the amplitude and/or bias of the chirp tuning control signal, the frequency chirp of the intensity-modulated output signal from the EA modulator element can be controlled.

摘要翻译： 电吸收调制器包括常规电吸收（EA）调制器元件和相位调制器元件的串联布置。 EA调制器元件由数字数据信号驱动，相位调制器由啁啾调谐控制信号（例如数据信号的补码）驱动。 通过控制啁啾调谐控制信号的幅度和/或偏置，可以控制来自EA调制器元件的强度调制输出信号的频率啁啾。

公开(公告)号：US20030190107A1

公开(公告)日：2003-10-09

申请号：US10240796

申请日：2003-05-30

发明人： Robert Graham Walker

IPC分类号： G02F001/035

CPC分类号： G02F1/0123 ,  G02F1/225 ,  G02F1/2255 ,  G02F1/2257 ,  G02F2001/212 ,  G02F2203/25

摘要： An optical modulator for producing a modulated optical output having a pre-determined frequency chirp comprises: optical splitting means for receiving and splitting an optical input signal to be modulated into two optical signals to pass along two waveguide arms (36, 38) made electro-optic material; and optical combining means for receiving and combining the two optical signals into said modulated optical output. At least one electrode pair (40/44, 42/44) is associated with each waveguide arm (36, 38), and is electrically connected in series such as to modulate the phase of said optical signals in antiphase in response to a single electrical signal (Vmod) applied thereto. The modulator is characterised by a capacitive element (60) connected to the electrode pair (42) of one arm (38) such as to modify the division of the single electrical signal (Vmod) such that the magnitude of the electrical signal across the electrode pail (42/44) of one arm (38) is different to that across the electrode pair (40/44) of the other arm (36) thereby imparting the pre-determined frequency chirp in the modulated optical output.

摘要翻译： 一种用于产生具有预定频率线性调频脉冲的调制光输出的光调制器包括：光分路装置，用于接收和分离待调制的光输入信号以两路光信号通过两条制成电 - 光学材料; 以及用于将两个光信号接收并组合成所述调制光输出的光学组合装置。 至少一个电极对（40/44，42/44）与每个波导臂（36,38）相关联，并且串联电连接，以便响应于单个电气来反相地调制所述光信号的相位 信号（Vmod）。 调制器的特征在于连接到一个臂（38）的电极对（42）的电容元件（60），以便修改单个电信号（Vmod）的分割，使得横跨电极的电信号的幅度 一个臂（38）的桶（42/44）与穿过另一个臂（36）的电极对（40/44）的桶（42/44）不同，从而在调制光输出中赋予预定频率啁啾。

公开(公告)号：US06574027B2

公开(公告)日：2003-06-03

申请号：US09852626

申请日：2001-05-11

申请人： Yasunori Miyazaki

发明人： Yasunori Miyazaki

IPC分类号： G02F100

CPC分类号： B82Y20/00 ,  G02F1/01708 ,  G02F2001/01766 ,  G02F2203/25 ,  H01S5/0265

摘要： An optical modulator which is suitable for use in high-speed optical communications and simultaneously satisfies demands for incident light of higher intensity and lower chirp. An absorption layer having a multi-quantum-well structure includes a well layer having a first bandgap energy, and a barrier layer having a second bandgap energy, the second bandgap energy being greater than the first bandgap energy and no less than 0.946 eV.

摘要翻译： 一种适用于高速光通信的光调制器，同时满足更高强度和低啁啾入射光的要求。 具有多量子阱结构的吸收层包括具有第一带隙能的阱层和具有第二带隙能的势垒层，第二带隙能量大于第一带隙能量并且不小于0.946eV。

公开(公告)号：US6091864A

公开(公告)日：2000-07-18

申请号：US838737

申请日：1997-04-10

申请人： Rudolf J. Hofmeister

发明人： Rudolf J. Hofmeister

IPC分类号： G02F1/225 ,  G02F1/313 ,  H04B10/155 ,  G02F1/035

CPC分类号： G02F1/3136 ,  H04B10/5051 ,  H04B10/50575 ,  H04B10/58 ,  G02F1/225 ,  G02F1/2255 ,  G02F2203/25

摘要： A dual stage optical modulator is disclosed that uses optical predistortion to achieve a high degree of linearity and also provides signals having substantially no residual phase modulation, or chirp. The modulator allows fiber optic transmission over fibers having a zero dispersion wavelength that is significantly different from the operating wavelength of the source laser without a chirp-induced dispersion penalty. In one embodiment of the modulator, an input Y-junction splits an optical input signal into a first interferometer, also referred to as a phase/intensity modulator, having first and second interferometer arms and an electrode structure for modulating the split signal. The electrode structure includes a pair of ground electrodes and a modulating electrode for receiving a first RF modulating voltage and associated DC bias. The modulating electrode is positioned between the interferometer arms but is offset from the center of the arms for providing a first asymmetric electro-optic effect through the introduction of intensity modulation and residual phase shift in the split signals. The split signals are then mixed in unequal proportions in a directional coupler and are separated into a second phase/intensity modulator that is substantially similar to the first, but which receives a second RF modulating voltage. The signals from the second phase/intensity modulator are again mixed in unequal proportions in a second directional coupler which couples the signals and provides first and second optical output signals. Linearization is achieved through optical predistortion by adjusting the DC biases and attenuating the second modulating voltage with respect to the first such that any distortion generated in the first interferometer is canceled in the second interferometer. Chirp introduced in the signals by the first interferometer is reduced in the second interferometer and directional couplers and is eliminated in at least one of the output signals by appropriately selecting the amount of asymmetric phase distortion applied to the signal in each stage.

公开(公告)号：US5835212A

公开(公告)日：1998-11-10

申请号：US731760

申请日：1996-10-18

申请人： Karl Kissa ,  Jack Lin

发明人： Karl Kissa ,  Jack Lin

IPC分类号： G02F1/035 ,  G02F1/313 ,  G01B9/02

CPC分类号： G02F1/3136 ,  G02F2203/25

摘要： A variable chirp electro-optic modulator is provided that uses a single modulation signal. The modulator has several optical paths in the proximity of one or more modulation electrodes which are driven equally by a single modulation source. The amount of chirp desired of the modulator is controlled by varying the optical amplitude or phase of the light in the different paths.

摘要翻译： 提供了使用单个调制信号的可变啁啾电光调制器。 调制器在一个或多个调制电极附近具有几个光路，这些调制电极被单个调制源平等地驱动。 通过改变不同路径中的光的光学振幅或相位来控制调制器所需的啁啾的量。

公开(公告)号：US5778113A

公开(公告)日：1998-07-07

申请号：US745168

申请日：1996-11-07

申请人： Jun Yu

发明人： Jun Yu

IPC分类号： G02F1/017 ,  G02F1/225 ,  G02B6/10

CPC分类号： B82Y20/00 ,  G02F1/225 ,  G02F1/2257 ,  G02F1/01708 ,  G02F2201/126 ,  G02F2203/20 ,  G02F2203/25

摘要： A multi-quantum-well Mach-Zehnder optical phase modulator selectively generates positive and negative frequency chirp. The modulator has an asymmetric input y-junction coupler and an asymmetric output y-junction coupler joined by interferometric arms defining two optical paths of unequal length so as to generate a fixed phase difference of .pi. or an integral odd multiple thereof. The modulator has electrodes on each arm for receiving modulating electric fields in a push-pull relationship. A control electrode is provided on one of the arms for receiving a control electric field. The modulator, when driven without any control electric field generates negative frequency chirp, and selectively generates positive frequency chirp in response to adjustment of the control electric field. As an alternative, the length differential between respective arms can be selected to generate a phase difference of .pi./2, in which case control electrodes are required on each of the interferometric arms. A method of selectively generating a modulated optical signal having selectively configurable frequency chirp is also described.

摘要翻译： 多量子阱马赫 - 曾德尔光学相位调制器选择性地产生正和负频率啁啾声。 调制器具有非对称输入y结耦合器和不对称输出的y耦合耦合器，其通过限定两个不等长度的光路的干涉臂连接，以便产生π的固定相位差或其整数奇数倍。 调制器在每个臂上具有用于以推挽关系接收调制电场的电极。 控制电极设置在一个臂上用于接收控制电场。 调制器在没有任何控制电场的情况下被驱动产生负频率啁啾声，并且响应于控制电场的调节选择性地产生正频率啁啾声。 作为替代，可以选择各个臂之间的长度差异以产生pi / 2的相位差，在这种情况下，每个干涉臂上需要控制电极。 还描述了选择性地生成具有选择性配置的频率啁啾的调制光信号的方法。

公开(公告)号：US20170235188A1

公开(公告)日：2017-08-17

申请号：US15042608

申请日：2016-02-12

申请人： Microsoft Technology Licensing, LLC

发明人： Timothy Large

IPC分类号： G02F1/1335 ,  G02F1/1334

CPC分类号： G02F1/133555 ,  G02F1/1334 ,  G02F1/13342 ,  G02F1/133504 ,  G02F1/133509 ,  G02F1/133606 ,  G02F2001/13345 ,  G02F2001/133521 ,  G02F2001/133623 ,  G02F2001/133626 ,  G02F2201/307 ,  G02F2203/25 ,  G02F2203/58 ,  G02F2203/62

摘要： A display includes a display modulation layer, a backlight unit configured to generate light for illumination of the display modulation layer, and a filter film disposed between the backlight unit and the display modulation layer. The filter film includes a plurality of Bragg grating sets. Each Bragg grating set is configured to reflect the light in a wavelength-selective and angular-selective manner rearward toward the backlight unit.

公开(公告)号：US20150309386A1

公开(公告)日：2015-10-29

申请号：US14261295

申请日：2014-04-24

申请人： CANON KABUSHIKI KAISHA

发明人： Takefumi Ota

IPC分类号： G02F1/35

CPC分类号： G02F1/035 ,  G02F2201/305 ,  G02F2203/25

摘要： An apparatus for altering a chirp of an input light comprising one or more grating structures and one or more electro-optical blocks. In which a voltage is applied to the one or more electro-optical blocks to alter a chirp of light exiting the apparatus.

摘要翻译： 一种用于改变包括一个或多个光栅结构和一个或多个电光块的输入光的啁啾的装置。 其中向一个或多个电光学块施加电压以改变离开设备的光的啁啾线。