公开(公告)号：US20130155482A1

公开(公告)日：2013-06-20

申请号：US13663758

申请日：2012-10-30

Applicant: Fujitsu Optical Components Limited

Inventor： Akihiro TOYA ,  Tsuyoshi Morishita

IPC: G02F1/01

CPC classification number: G02F1/01 ,  G02F1/0123 ,  H04B10/50572 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/5561

Abstract: In an optical modulation device, a first drive signal and a first bias signal are applied to a phase modulation unit, a second drive signal and a second bias signal are applied to a phase modulation unit, and a third bias signal is applied to a π/2 phase shift unit. A control unit adjusts the third bias signal in a first adjustment period, adjusts the first drive signal and the first bias signal in a second adjustment period next to the first adjustment period, and adjusts the second drive signal and the second bias signal in a third adjustment period next to the second adjustment period. The control unit starts the second adjustment period before a gap between the current value of an adjustment reference signal and a target value is filled, and starts the third adjustment period before a gap in the second adjustment period is filled.

Abstract translation: 在光调制装置中，将第一驱动信号和第一偏置信号施加到相位调制单元，将第二驱动信号和第二偏置信号施加到相位调制单元，并将第三偏置信号施加到pi / 2相移单元。 控制单元在第一调整周期中调整第三偏置信号，在与第一调整周期相邻的第二调整周期中调整第一驱动信号和第一偏置信号，并且在第三调整周期中调整第二驱动信号和第二偏置信号 调整期在第二个调整期之后。 控制单元在填充调整基准信号的当前值和目标值之间的间隙之前开始第二调整周期，并且在第二调整周期中的间隙被填满之前开始第三调整周期。

公开(公告)号：US09007675B2

公开(公告)日：2015-04-14

申请号：US13663758

申请日：2012-10-30

Applicant: Fujitsu Optical Components Limited

Inventor： Akihiro Toya ,  Tsuyoshi Morishita

IPC: G02F1/01 ,  H04B10/50 ,  H04B10/556

CPC classification number: G02F1/01 ,  G02F1/0123 ,  H04B10/50572 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/5561

Abstract: In an optical modulation device, a first drive signal and a first bias signal are applied to a phase modulation unit, a second drive signal and a second bias signal are applied to a phase modulation unit, and a third bias signal is applied to a π/2 phase shift unit. A control unit adjusts the third bias signal in a first adjustment period, adjusts the first drive signal and the first bias signal in a second adjustment period next to the first adjustment period, and adjusts the second drive signal and the second bias signal in a third adjustment period next to the second adjustment period. The control unit starts the second adjustment period before a gap between the current value of an adjustment reference signal and a target value is filled, and starts the third adjustment period before a gap in the second adjustment period is filled.

Abstract translation: 在光调制装置中，将第一驱动信号和第一偏置信号施加到相位调制单元，将第二驱动信号和第二偏置信号施加到相位调制单元，并将第三偏置信号施加到＆pgr ; / 2相移单元。 控制单元在第一调整周期中调整第三偏置信号，在与第一调整周期相邻的第二调整周期中调整第一驱动信号和第一偏置信号，并且在第三调整周期中调整第二驱动信号和第二偏置信号 调整期在第二个调整期之后。 控制单元在填充调整基准信号的当前值和目标值之间的间隙之前开始第二调整周期，并且在第二调整周期中的间隙被填满之前开始第三调整周期。

公开(公告)号：US11309971B2

公开(公告)日：2022-04-19

申请号：US17135593

申请日：2020-12-28

Applicant: Fujitsu Optical Components Limited

Inventor： Tetsuji Yamabana ,  Tsuyoshi Morishita

IPC: H04B10/50 ,  H04B10/556 ,  H04B10/564

Abstract: Controller and control method are provided. In particular, a controller is disclosed as being configured to hold intensities of a monitor signal, which changes according to an output from a region in a device, before and after altering a state of a portion in the region and control the state of the portion based on a difference between the held intensities.