公开(公告)号：US20150071582A1

公开(公告)日：2015-03-12

申请号：US14541864

申请日：2014-11-14

Applicant: Fujitsu Optical Components Limited

Inventor： Hiroshi NISHIMOTO ,  Hiroshi Kuwahara

IPC: G02F1/225

CPC classification number: G02F1/2257 ,  G02F1/0123 ,  G02F2001/212 ,  H04B10/50572 ,  H04B10/50575

Abstract: An optical modulator includes: a modulator including an optical waveguide provided in a semiconductor substrate having an electro-optical effect and an electrode to apply an electric field depending on a bias voltage and a modulation signal to the optical waveguide; a driver circuit to generate a modulation signal in accordance with an input signal; a superimposer to superimpose a reference signal on the bias voltage, the reference signal having lower frequency than the modulation signal; and a controller to control a bias voltage in a direction orthogonal to a modulation direction of the modulator based on the frequency component of the reference signal extracted from a modulated optical signal generated by the modulator.

Abstract translation: 光调制器包括：调制器，包括设置在具有电光效应的半导体衬底中的光波导和电极，以根据偏置电压和调制信号向光波导施加电场; 驱动电路，用于根据输入信号产生调制信号; 叠加器，用于将参考信号叠加在所述偏置电压上，所述参考信号的频率低于所述调制信号; 以及控制器，用于基于从调制器生成的调制光信号中提取的参考信号的频率分量来控制与调制器的调制方向正交的方向上的偏置电压。

公开(公告)号：US09069224B2

公开(公告)日：2015-06-30

申请号：US14541897

申请日：2014-11-14

Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

Inventor： Hiroshi Nishimoto ,  Hiroshi Kuwahara

IPC: H04J14/02 ,  H04B10/04 ,  H04J14/08 ,  H04B10/02 ,  H04J14/06 ,  G02F1/295 ,  G02F1/225 ,  H04B10/50 ,  G02F1/01 ,  G02F1/21

CPC classification number: G02F1/2257 ,  G02F1/0123 ,  G02F2001/212 ,  H04B10/50572 ,  H04B10/50575

Abstract: An optical modulator includes: a modulator including an optical waveguide provided in a semiconductor substrate having an electro-optical effect and an electrode to apply an electric field depending on a bias voltage and a modulation signal to the optical waveguide; a driver circuit to generate a modulation signal in accordance with an input signal; a superimposer to superimpose a reference signal on the bias voltage, the reference signal having lower frequency than the modulation signal; and a controller to control a bias voltage in a direction orthogonal to a modulation direction of the modulator based on the frequency component of the reference signal extracted from a modulated optical signal generated by the modulator.

Abstract translation: 光调制器包括：调制器，包括设置在具有电光效应的半导体衬底中的光波导和电极，以根据偏置电压和调制信号向光波导施加电场; 驱动电路，用于根据输入信号产生调制信号; 叠加器，用于将参考信号叠加在所述偏置电压上，所述参考信号的频率低于所述调制信号; 以及控制器，用于基于从调制器生成的调制光信号中提取的参考信号的频率分量来控制与调制器的调制方向正交的方向上的偏置电压。

公开(公告)号：US09244328B2

公开(公告)日：2016-01-26

申请号：US14541864

申请日：2014-11-14

Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

Inventor： Hiroshi Nishimoto ,  Hiroshi Kuwahara

IPC: H04J14/02 ,  H04B10/04 ,  H04J14/08 ,  H04B10/02 ,  G02F1/295 ,  G02F1/225 ,  H04B10/50 ,  G02F1/01 ,  G02F1/21

CPC classification number: G02F1/2257 ,  G02F1/0123 ,  G02F2001/212 ,  H04B10/50572 ,  H04B10/50575

Abstract: An optical modulator includes: a modulator including an optical waveguide provided in a semiconductor substrate having an electro-optical effect and an electrode to apply an electric field depending on a bias voltage and a modulation signal to the optical waveguide; a driver circuit to generate a modulation signal in accordance with an input signal; a superimposer to superimpose a reference signal on the bias voltage, the reference signal having lower frequency than the modulation signal; and a controller to control a bias voltage in a direction orthogonal to a modulation direction of the modulator based on the frequency component of the reference signal extracted from a modulated optical signal generated by the modulator.