Check patentability & draft patents in minutes with Patsnap Eureka AI!

Full optical-fiber Mach-Zehnder interferometer of polarization fading and polarization phase-position noise resistance

A phase noise and polarization fading technology, which is applied in the coupling of optical waveguides and the use of optical devices to transmit sensing components, can solve problems such as complex detection technology, solve polarization phase noise, solve polarization fading problems, and form a simple and easy-to-implement Effect

Active Publication Date: 2009-09-09
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem with this scheme is that the detection technology is complex

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
  • Full optical-fiber Mach-Zehnder interferometer of polarization fading and polarization phase-position noise resistance
  • Full optical-fiber Mach-Zehnder interferometer of polarization fading and polarization phase-position noise resistance
  • Full optical-fiber Mach-Zehnder interferometer of polarization fading and polarization phase-position noise resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Preferred embodiments of the present invention are described as follows in conjunction with the accompanying drawings:

[0027] see figure 1 , the present invention utilizes bridged cascaded optical fiber ring chains ( figure 2), can constitute infinitely many transmission paths on the two interference arms of the Mach-Zehnder fiber interferometer respectively, and these light transmission paths decompose the transmitted light on the two arms into infinitely many tiny light components with different transmission paths. The path decomposition light components transmitted in the same direction are irrelevant to each other, the light component pairs of the two interference arms of the same path have the same intensity, and the polarization state is random; therefore, the total interference result received by the photodetector is the opposite passage corresponding to each transmission path The statistical average of the interference results of each tiny coherent light pai...

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 relates to a method and a system for solving the problems of polarization fading and polarization phase-position noise caused by the polarization perturbation in the optical-fiber Mach-Zehnder interferometer. The method of the invention decomposes a pair of interference light into unlimited pairs of micro-interference lights with different transmission paths by bridging a cascading optical-fiber ring chain between two interference arms of the optical-fiber Mach-Zehnder interferometer. Light components of different transmission paths are not coherent, and the coupling coefficient of a light branching unit is optimally designed by the design of the ring length to enable the strength distribution of the light components to be reasonable. The polarizing state of every pair of micro light components is random but the differences of the transmission phase positions of all interference light pairs are same, thus, the output of the optical-fiber Mach-Zehnder interferometer is the statistical average of the interference results of many coherent light component pairs corresponding to every different transmission path. When the number of the light component pairs of independent interference is enough, the result of the statistical interference tends to be stable, thus, the problems of the polarization phase-position noise and the polarization fading caused by the polarization perturbation in the system can be solved.

Description

technical field [0001] The invention relates to a novel optical fiber Mach-Zehnder interferometer which can overcome the problems of polarization fading and polarization phase noise caused by the polarization disturbance in the interference structure and the polarization disturbance of the light source in the general optical fiber Mach-Zehnder interferometer. The key is to use the cascaded optical fiber ring chain to realize the depolarization interference of the transmitted light on the two interference arms in the optical fiber Mach-Zehnder interferometer, thereby solving the problems of polarization fading and polarization phase noise of the system. Background technique [0002] Optical fiber sensing technology is the development trend of the new generation of sensors, and together with optical communication and optical information processing, optical information technology is built, and it is recognized as the most promising field at home and abroad. Optical fiber sensor...

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): G01D5/26G02B6/26G02B6/28
Inventor 王春华李力王廷云黄肇明彭蕾应可捷
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com