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

Wavelength shift testing apparatus, wavelength locking system and method thereof

A wavelength drift and detection device technology, applied in the field of optical communication, can solve problems such as high requirements for filtering and extraction of scrambled signals, reduced reliability of wavelength locking, and complex low-frequency scrambling devices, so as to improve accuracy, simplify complexity, and eliminate interference effect

Inactive Publication Date: 2008-08-20
HUAWEI TECH CO LTD
View PDF0 Cites 36 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] for image 3 The method shown requires different low-frequency modulations for different wavelengths at the same time, which makes the low-frequency scrambling device more complicated and needs to be realized by fractional frequency division and other technologies, and the interval between different disturbance frequencies is relatively small, and there is interference between them. The requirements for filtering and extracting the scrambled signal are relatively high, which increases the complexity of the entire device and reduces the reliability of wavelength locking

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
  • Wavelength shift testing apparatus, wavelength locking system and method thereof
  • Wavelength shift testing apparatus, wavelength locking system and method thereof
  • Wavelength shift testing apparatus, wavelength locking system and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0038] Figure 4 It is a schematic structural diagram according to an embodiment of the present invention. In this implementation, each optical module includes a feedback controller, a laser transmitter, and a low-frequency modulation module, such as Figure 4 In the optical module 160a to the optical module 160n. The optical signals output by each optical module are combined into a single optical signal output by a multiplexing unit such as a multiplexer 150, and a small part of the optical signal is split by the optical splitter 140 and introduced into the wavelength locking device 130, which is used for wavelength locking 130 includes a wavelength shift detection device and a processing control module 132.

[0039] The wavelength shift detection device includes a wavelength locking module 131 and a signal processing module 135. The following takes...

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 present invention discloses a wavelength setting drift detecting device, wavelength locking system and method thereof, multiple optical modules shares one set device for lock down wavelength, and wavelength do not need select module, because only one outputting signal of optical module is scrambled, and different optical module outputs with identification information light signal, all identification information are sameness. If scrambling of each light signal adopts identical frequency, complexity of scrambling device is simplified, and interference between scrambling signals can be eliminated, because switch of electromechanical device control wavelength is not used, cost is reduced, locking velocity is improved, and precision of signal processing is improved, thereby locking accuracy of wavelength is improved.

Description

Technical field [0001] The present invention relates to the field of optical communication technology, and in particular, to a wavelength drift detection device, a wavelength locking system and a method in a dense wavelength division multiplexing (DWDM, DenseWavelength Division Multiplexing) system. Background technique [0002] With the rapid growth of broadband services, there is a higher demand for transmission bandwidth. DWDM is a technology used to increase bandwidth on existing fiber optic networks. This technology uses dense wavelength division multiplexing to transmit multiple signals of different wavelengths in one optical fiber, thereby improving the transmission capacity of a single optical fiber. When the number of optical fibers is limited, the wavelength division multiplexing system is one of the effective methods to increase transmission capacity. [0003] In a DWDM system, as the number of transmission channels increases, the spacing between channels contin...

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): H04J14/02H04B10/08H04B10/572
CPCH01S5/0687H04B10/572
Inventor 涂敏海
Owner HUAWEI TECH CO LTD
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