公开(公告)号：WO2016154472A1

公开(公告)日：2016-09-29

申请号：PCT/US2016/024078

申请日：2016-03-24

Applicant: FINISAR CORPORATION

Inventor： BHANDARE, Suhas, P. ,  COLYAR, Mark ,  MELOCHE, David ,  GRENDA, Terence, D. ,  STOOK, Chris ,  EREIFEJ, Heider, N. ,  DEANDREA, John, J.

IPC: H04B10/50

CPC classification number: G02F1/0123 ,  G01J4/00 ,  G02F1/2257 ,  G02F2001/212 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/532 ,  H04B10/548

Abstract: Embodiments include a method and apparatus used for automatic bias stabilization of a DP IQM based on MZM for transmitting DP-QPSK optical data and/or DP-16QAM optical data. The apparatus simultaneously dithers DC-bias voltages of in-phase child, quadrature-phase child, and parent MZMs with three different dither patterns in time-domain which are mutually orthogonal to each other in the frequency-domain for X and Y polarization IQ modulators. Tap monitor photodiodes detect an interference term between these three dither patterns for each polarization. The interference term is sampled using an ADC in the time domain. The time-synchronous detection method may solve a set of three simultaneous linear partial differential equations with three unknowns to compute controlled DC-bias voltages to set on the respective MZM with a solution set which may iteratively converge to a unique solution, thereby biasing the child MZM in dual-polarization IQM to transmission minimum and parent MZM in quadrature transmission.

Abstract translation: 实施例包括用于基于用于发送DP-QPSK光学数据和/或DP-16QAM光学数据的MZM的DP IQM的自动偏置稳定的方法和装置。 该装置同时在X和Y偏振IQ调制器的频域中抖动在时域中具有三个不同抖动模式的同相子，正交相位子和母MZM的直流偏置电压，其在频域中彼此相互正交 。 点击监视器光电二极管可以检测每个极化的这三个抖动图案之间的干涉项。 使用时域中的ADC对干扰项进行采样。 时间同步检测方法可以解决一组具有三个未知数的三个同时线性偏微分方程，以计算受控直流偏置电压，以使用可以迭代地收敛到唯一解的解集合在相应的MZM上设置，由此偏置子 MZM在双极化IQM到传输最小和母MZM在正交传输。

公开(公告)号：EP3275098A1

公开(公告)日：2018-01-31

申请号：EP16715946.6

申请日：2016-03-24

Applicant: Finisar Corporation

Inventor： BHANDARE, Suhas, P. ,  COLYAR, Mark ,  MELOCHE, David ,  GRENDA, Terence, D. ,  STOOK, Chris ,  EREIFEJ, Heider, N. ,  DEANDREA, John, J.

IPC: H04B10/50

CPC classification number: G02F1/0123 ,  G01J4/00 ,  G02F1/2257 ,  G02F2001/212 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/532 ,  H04B10/548

Abstract: Embodiments include a method and apparatus used for automatic bias stabilization of a DP IQM based on MZM for transmitting DP-QPSK optical data and/or DP-16QAM optical data. The apparatus simultaneously dithers DC-bias voltages of in-phase child, quadrature-phase child, and parent MZMs with three different dither patterns in time-domain which are mutually orthogonal to each other in the frequency-domain for X and Y polarization IQ modulators. Tap monitor photodiodes detect an interference term between these three dither patterns for each polarization. The interference term is sampled using an ADC in the time domain. The time-synchronous detection method may solve a set of three simultaneous linear partial differential equations with three unknowns to compute controlled DC-bias voltages to set on the respective MZM with a solution set which may iteratively converge to a unique solution, thereby biasing the child MZM in dual-polarization IQM to transmission minimum and parent MZM in quadrature transmission.