Operating point control system and method for rz-dqpsk modulation

A control system and operating point technology, applied in the direction of phase modulation carrier system, transmission system, electromagnetic wave transmission system, etc., can solve the problems of degraded system performance, reduce the maximum dynamic range of optical communication connection, etc., and achieve the effect of stable control

Active Publication Date: 2011-11-30
WUHAN TELECOMM DEVICES
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When drift occurs, the MZ modulator will exhibit strong nonlinearity, reducing the maximum dynamic range of the optical communication connection and degrading the performance of the entire system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Operating point control system and method for rz-dqpsk modulation
  • Operating point control system and method for rz-dqpsk modulation
  • Operating point control system and method for rz-dqpsk modulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] In order to facilitate a further understanding of the present invention, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

[0027] like figure 1 As shown, the present invention is used for the operating point control system of RZ-DQPSK modulation and includes automatic bias controller (Auto Bias Controller) and splitter (Optical Splitter), wherein the DQPSK modulator and pulse splitter of RZ-DQPSK modulator Each uses its own PD (Photoelectric Diode, photodiode) to connect the input end of the automatic bias controller (not shown in the figure), and the output end of the automatic bias controller is respectively connected to the three DC biases of the DQPSK modulator (DC bias) pins a, b, c and the DC bias pin d of the pulse cutter, and one end of the optical splitter is connected to the DQPSK modulator through an optical fiber, and the other end is connected to the automatic bias controller and the pulse cutter ( Wherein...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an operating point control system and an operating point control method for return-to-zero-differential quadrature phase shift keying (RZ-DQPSK) modulation. The system comprises an automatic bias controller and an optical splitter. A DQPSK modulator and a pulse carver of an RZ-DQPSK modulator are connected with the input end of the automatic bias controller by own photoelectric diodes, and the output end of the automatic bias controller is connected to three DC bias pins of the DQPSK modulator and the DC bias pin of the pulse carver respectively. One end of the opticalsplitter is connected with the DQPSK modulator by an optical fiber, and the other end of the optical splitter is connected with the automatic bias controller and the pulse carver by the optical fiberrespectively. By the system and the method, a bias point can be kept unchanged under the condition of environmental change to fulfill the aim of stably controlling an operating point.

Description

technical field [0001] The present invention relates to a working point control system and method used in the field of optical transmission network, in particular to a system and method for RZ-DQPSK (Return-to-Zero-Differential Quadrature Phase Shift Keying, Return-to-Zero-Differential Quadrature Phase Operating point control system and method for shift keying) modulation. Background technique [0002] Return-to-zero-differential quadrature phase-shift keying (RZ-DQPSK) can be used as an efficient modulation format to achieve long-distance transmission, improve spectral efficiency, and increase tolerance against dispersion. Since DQPSK (Differential Quadrature Phase Shift Keying) can transmit two bits (bits) with one symbol, it provides a higher and effective transmission rate with a lower electrical rate. [0003] Usually, the RZ-DQPSK modulator includes a two-stage modulator, and the first-stage modulator is a DQPSK Modulator (differential quadrature phase-shift keying mo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04L27/20H04B10/12H04B10/50
Inventor 匡杨胡毅蔡亮杨瑾侯阳洋
Owner WUHAN TELECOMM DEVICES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap