公开(公告)号：US08693005B2

公开(公告)日：2014-04-08

申请号：US13845393

申请日：2013-03-18

Applicant: National Institute of Information and Communications Technology

Inventor： Tetsuya Kawanishi ,  Shinya Nakajima ,  Satoshi Shinada

IPC: G01B9/02 ,  H04B10/04 ,  H04B10/12

CPC classification number: G01B9/02 ,  G01M11/00 ,  G02F1/2255 ,  G02F2001/212 ,  G02F2201/18 ,  G02F2203/25 ,  G02F2203/69

Abstract: ProblemsTo provide a method for evaluating characteristics of MZ interferometers in an optical modulator having a plurality of MZ interferometers.Means for Solving ProblemsWhen an optical modulator includes a plurality of MZ interferometers, the 0-degree component contains a signal derived from an MZ interferometer other than the MZ interferometers for evaluating the characteristic. For this, it is impossible to accurately evaluate the characteristic of the MZ interferometers. The present invention does not use the 0-degree component normally having the highest intensity. That is, the characteristic of the MZ interferometers are evaluated by using a side band intensity of the component other than the 0-degree component.

Abstract translation: 问题提供一种用于评估具有多个MZ干涉仪的光调制器中的MZ干涉仪的特性的方法。 解决问题的手段当光调制器包括多个MZ干涉仪时，0度分量包含从用于评估特性的MZ干涉仪以外的MZ干涉仪导出的信号。 为此，不可能准确地评估MZ干涉仪的特性。 本发明不使用通常具有最高强度的0度组分。 也就是说，通过使用除了0度分量之外的分量的边带强度来评估MZ干涉仪的特性。

公开(公告)号：US11088777B2

公开(公告)日：2021-08-10

申请号：US16966455

申请日：2018-01-31

Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY

Inventor： Ruben Soares Luis ,  Georg Friedrich Rademacher ,  Ben Puttnam ,  Satoshi Shinada ,  Naoya Wada

IPC: H04B10/00 ,  H04J14/06 ,  H04B10/516 ,  H04B10/66 ,  H04J14/00

Abstract: It is therefore an object of the disclosure of this document to attain a data transmission system with a simple transmitter implementing polarization multiplexing using either DML or EAM and a receiver with only one PD. A data transmission system 1 which comprises a transmitter 3 and a receiver 5, wherein the transmitter 3 comprises a first signal processor 11 and an optical signal generator 13, the optical signal generator 13 outputs an optical signal which comprises X and Y polarization components, ex(t) and ey(t), and wherein the first signal processor 11 receives a first data stream, Sx, and a second data stream, Sy, and controls the X and Y polarization components to reflect the first and the second data streams, respectively, wherein the receiver 5 comprises only one photodetector 21 and a second signal processor 23.