公开(公告)号：US09294200B2

公开(公告)日：2016-03-22

申请号：US14711397

申请日：2015-05-13

Applicant: Ciena Corporation

Inventor： Gary Mak ,  Yves Beaulieu ,  Mohammad Sotoodeh

IPC: H04B10/50 ,  H04B10/548 ,  H04B10/54 ,  H04B10/556 ,  G02F1/01 ,  G02F1/225 ,  H04B10/532

CPC classification number: H04B10/548 ,  G02F1/0123 ,  G02F1/2255 ,  H04B10/5055 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/532 ,  H04B10/541 ,  H04B10/5561

Abstract: A modulator bias selection method, a coherent optical transmitter, and optical modulator solve the problem of generating a correct constellation using the bias points with the minimum phase adjustment range. The optimum modulator bias systems and methods include a coherent optical transmitter with control of four (XI, XQ, YI, YQ) quadrature data signals via a transmitter (Tx) application specific integrated circuit (ASIC), with a modulator bias controller which implements an algorithm to find the optimum bias points. The optimum bias points yield a correct constellation with minimum phase/bias adjustment. An algorithm is used to find the optimum bias solution using fast, simple method, adjusting only one quadrature at a time and exploiting a control feature of the Tx ASIC. This algorithm is significantly simpler than a generalized search, is a local algorithm, and uses only DC power measurement at the transmitter.

公开(公告)号：US20240405880A1

公开(公告)日：2024-12-05

申请号：US18328027

申请日：2023-06-02

Applicant: CIENA CORPORATION

Inventor： Shahab Oveis Gharan ,  Yves Beaulieu ,  Douglas McGhan ,  Kim Byron Roberts

IPC: H04B10/516

Abstract: Aspects of the subject disclosure may include, for example, obtaining two inputs xI and xQ based on a digital input signal, and causing a modulator to create two substantially orthogonal output dimensions I and Q based on the two inputs xI and xQ, by performing controlled introduction of a correlation between the two inputs xI and xQ for the modulator, and detecting a resulting output power of the modulator to facilitate operation of the modulator. Other embodiments are disclosed.

公开(公告)号：US20150244468A1

公开(公告)日：2015-08-27

申请号：US14711397

申请日：2015-05-13

Applicant: Ciena Corporation

Inventor： Gary Mak ,  Yves Beaulieu ,  Mohammad Sotoodeh

IPC: H04B10/548 ,  H04B10/532

CPC classification number: H04B10/548 ,  G02F1/0123 ,  G02F1/2255 ,  H04B10/5055 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/532 ,  H04B10/541 ,  H04B10/5561

Abstract: A modulator bias selection method, a coherent optical transmitter, and optical modulator solve the problem of generating a correct constellation using the bias points with the minimum phase adjustment range. The optimum modulator bias systems and methods include a coherent optical transmitter with control of four (XI, XQ, YI, YQ) quadrature data signals via a transmitter (Tx) application specific integrated circuit (ASIC), with a modulator bias controller which implements an algorithm to find the optimum bias points. The optimum bias points yield a correct constellation with minimum phase/bias adjustment. An algorithm is used to find the optimum bias solution using fast, simple method, adjusting only one quadrature at a time and exploiting a control feature of the Tx ASIC. This algorithm is significantly simpler than a generalized search, is a local algorithm, and uses only DC power measurement at the transmitter.

Abstract translation: 调制器偏置选择方法，相干光发射机和光调制器使用具有最小相位调整范围的偏置点来解决产生正确星座的问题。 最佳调制器偏置系统和方法包括通过发射机（Tx）专用集成电路（ASIC）控制四个​​（XI，XQ，YI，YQ）正交数据信号的相干光发射机，具有调制器偏置控制器，其实现 算法找到最佳偏好点。 最佳偏置点产生具有最小相位/偏置调整的正确星座。 使用一种算法来使用快速，简单的方法找到最佳的偏置解决方案，一次调整一个正交，并利用Tx ASIC的控制特性。 该算法比广义搜索要简单得多，是局部算法，仅在发射机上使用直流功率测量。