Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optical coupler including mode-mixing

An optocoupler, mode mixing technology, applied in the field of optical communication, can solve problems such as unreliable work and obstacles

Inactive Publication Date: 2008-10-01
FINISAR
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The sum of all these effects is that traditional multimode optocouplers do not work reliably at high bit rates (e.g., at least as high as 4 gigabits per second (Gbps))
Therefore, due to the increase in data rate, some limitations have created obstacles to traditional optocouplers to provide reliable access network data flow without compromising data transmission and network operation

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
  • Optical coupler including mode-mixing
  • Optical coupler including mode-mixing
  • Optical coupler including mode-mixing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Conventional optical couplers are not capable of mode distribution within an optical fiber. Modes are the various possible patterns of sustaining or propagating an electromagnetic field in an optical fiber. A mode is characterized by the wavelength, spatial distribution and direction of its electromagnetic field components relative to the fiber's boundaries, and the field strength of these components.

[0023] As the optocoupler splitting ratio increases, the probability of modal noise in the output of a small fraction of taps increases significantly. Mode noise arises from the loss of power in one or more modes of the optical signal when the optical signal is split between a majority of the main output and a small fraction of the tap output of the optocoupler. This pattern noise manifests itself as added jitter at the output of a few taps, however such jitter is not generally representative of the signal at most of the main output.

[0024] As disclosed herein, mode ...

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

A mode-mixer is used to introduce mode-mixing to an input in an optical coupler. As a result, modal noise effects are minimized in an output of the optical coupler. An example of a mode-mixer implemented includes a step index optical fiber which may or may not be coupled to a graded index optical fiber via a splice within an optical coupler. The splice may be a mechanical splice using connectors or a fused splice in some embodiments. The optical coupler may be included in a system for monitoring and / or analyzing a network.

Description

[0001] related application [0002] This application claims the benefit of US Provisional Application No. 60 / 908,396, filed March 27, 2007. Its content is hereby incorporated by reference. technical field [0003] The present invention relates to the technical field of optical communication, in particular to an optical coupler including mode mixing and a method for processing optical signals. Background technique [0004] Monitoring and analysis of data networks that transmit and receive data at high data rates requires the ability to access network data streams without disrupting data transmission or network operations. To this end, a monitoring system utilizing network taps configured to capture network data for analysis without compromising the operation of the network is employed. In multimode fiber optic networks, optical couplers can be used to extract a portion of the optical energy from the signal in the main transmission path. The fraction thus extracted can be r...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/12H04B10/20G02B6/26
Inventor 乔纳森·P·金保罗·C·亚伯拉罕斯盖尔·L·诺布尔
Owner FINISAR
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com