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    • 1. 发明申请
    • OPTIMUM MODULATOR BIAS SYSTEMS AND METHODS IN COHERENT OPTICAL TRANSMITTERS
    • 最优调制器偏置系统和相干光发射机的方法
    • US20140308047A1
    • 2014-10-16
    • US13860827
    • 2013-04-11
    • Gary MakYves BeaulieuMohammad Sotoodeh
    • Gary MakYves BeaulieuMohammad Sotoodeh
    • G02F1/01
    • H04B10/548G02F1/0123G02F1/2255H04B10/5055H04B10/50575H04B10/50577H04B10/532H04B10/541H04B10/5561
    • 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.
    • 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。
    • 2. 发明授权
    • Quadrature power balance control in optical transmitters
    • 光发射机中的正交功率平衡控制
    • US09124364B1
    • 2015-09-01
    • US13483622
    • 2012-05-30
    • Mohammad SotoodehGary MakYves Beaulieu
    • Mohammad SotoodehGary MakYves Beaulieu
    • H04B10/079H04B10/50
    • H04B10/0799H04B10/50577H04B10/5561
    • A method of controlling an optical transmitter having a Dual Parallel Mach-Zehnder (DPMZ) modulator. An I-Q power balance between respective branches of the DPMZ modulator is detected, and at least one parameter of the DPMZ modulator is adjusted to drive the I-Q power balance to a predetermined target value. An optical transmitter may have Quad Parallel Mach-Zehnder (QPMZ) modulator having a pair of parallel DPMZ modulators for modulating respective X- and Y-polarization lights. In such cases, an X-Y power imbalance between the two polarization lights is detected, and at least one parameter of the QPMZ modulator is adjusted to drive the X-Y power imbalance to a predetermined value.
    • 一种控制具有双平行马赫曾德(DPMZ)调制器的光发射机的方法。 检测到DPMZ调制器的各个分支之间的I-Q功率平衡,并且调整DPMZ调制器的至少一个参数以将I-Q功率平衡驱动到预定的目标值。 光发射机可以具有用于调制相应的X和Y偏振光的具有一对并行DPMZ调制器的Quad Parallel Mach-Zehnder(QPMZ)调制器。 在这种情况下,检测到两个偏振光之间的X-Y功率不平衡,并且调整QPMZ调制器的至少一个参数以将X-Y功率不平衡驱动到预定值。
    • 3. 发明授权
    • Optimum modulator bias systems and methods in coherent optical transmitters
    • 相干光发射机中的最佳调制器偏置系统和方法
    • US09059805B2
    • 2015-06-16
    • US13860827
    • 2013-04-11
    • Gary MakYves BeaulieuMohammad Sotoodeh
    • Gary MakYves BeaulieuMohammad Sotoodeh
    • H04B10/50H04B10/54H04B10/556
    • H04B10/548G02F1/0123G02F1/2255H04B10/5055H04B10/50575H04B10/50577H04B10/532H04B10/541H04B10/5561
    • 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.
    • 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。