Full-duplex three-terminal upper-lower carrier wave division multiplexer
A wavelength division multiplexer and three-terminal technology, which is applied in the field of full-duplex three-terminal carrier-division multiplexing optical fiber passive devices, can solve the problem of large light energy and arrayed waveguide filters that cannot complete fiber grating bus topology sensing. Problems such as upload and download multiplexing functions of wavelength signals transmitted in forward and reverse directions of the network
Inactive Publication Date: 2012-07-11
WUHAN UNIV OF TECH
View PDF7 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, existing optical fiber communication passive devices, such as: optical fiber looper, wavelength division multiplexer (Chinese patent 200920260057.x), upper and lower carrier division multiplexer (Chinese patent: 200410009560.X) and arrayed waveguide filter The device (Chinese patent 200720171906.5) cannot complete the upload and download multiplexing function of the forward and reverse bidirectional transmission wavelength signals required by the fiber grating bus topology sensor network
Optical fiber splitters can achieve this function, but it is at the cost of a large loss of optical energy, especially in the case of a large number of optical fiber splitters, the resulting loss of optical energy is very large
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] The technical solutions and implementation principles of the present invention will be further described below in conjunction with the accompanying drawings.
[0019] Full-duplex three-terminal up-down carrier division multiplexer of the present invention such as figure 1 As shown, it includes: three-terminal fiber circulator 1, four-terminal fiber circulator 2, the first chirped fiber grating (CFBG1) 3, the second chirped fiber grating (CFBG2) 4, the terminals of the three-terminal fiber circulator 1 1-1 is connected to the terminal 2-4 of the four-terminal optical fiber circulator 2, the terminal 1-3 of the three-terminal optical fiber circulator 1 is connected to the terminal 2-1 of the four-terminal optical fiber circulator 2, and the terminal of the three-terminal optical fiber circulator 1 1-2 is used as the input end I of the three-terminal up-down carrier division multiplexer; the four-terminal optical fiber circulator 2-terminal 2-2 is connected with the first ...
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
Login to View More Abstract
The invention relates to a full-duplex three-terminal upper-lower carrier wave division multiplexer used in a fiber grating bus topology sensing network. The full-duplex three-terminal upper-lower carrier wave division multiplexer is a passive fiber device and is mainly composed of a three-terminal fiber circulator and a four-terminal fiber circulator and two chirped fiber gratings with complementary reflectance spectra. Light of a broadband wavelength is inputted from a terminal I of the three-terminal upper-lower carrier wave division multiplexer, light of a narrowband wavelength is outputted from a terminal III of the three-terminal upper-lower carrier wave division multiplexer, and light of other wavelength spectra is outputted from a terminal II. The spectra outputted from the terminal II and the terminal III meet a complementary relationship. The light outputted from the terminals II and III of a filter can return along the original route and is then outputted from the terminal I of the filter.
Description
technical field [0001] The invention relates to a full-duplex three-terminal up and down carrier division multiplexing optical fiber passive device, which can be used in a fiber grating bus topology sensing network and belongs to the technical field of optical fiber sensing. technical background [0002] The existing fiber grating sensing technology is mainly divided into several network construction forms such as wavelength division multiplexing, space division multiplexing, time division multiplexing, frequency domain reflection and wavelength division / space division, wavelength division / time division hybrid multiplexing. Most of the sensor networks are connected by fiber grating sensors directly in series. This direct cascading network has many weaknesses: (1) A fiber grating sensor is damaged, and the fiber grating sensor behind this sensor cannot be detected; (2) in the construction process of engineering applications, in order to avoid damage, it is usually necessary ...
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
Login to View More IPC IPC(8): G02B6/293
Inventor 张东生朱方东李立彤
Owner WUHAN UNIV OF TECH