Reconstructing light top and bottom path multiplexer based on two-dimension photon crystal
A two-dimensional photonic crystal and multiplexer technology, which is applied in the field of optical fiber communication systems and ring networks, can solve the problems of harshness, complex resonance design, and difficulty in large-scale production, and achieve high efficiency of adding and dropping channels, short coupling length, and small size. Effect
Inactive Publication Date: 2009-12-02
SHANGHAI JIAOTONG UNIV
View PDF5 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, this system requires a relatively harsh and complex resonance design, that is, the two microcavity modes between the two waveguides must be completely degenerate, which may bring great difficulties to device fabrication.
The four-port system also has a structural disadvantage, that is, it is not easy to carry out large-scale multi-wavelength add / drop integration.
However, this chirped photonic crystal structure involves many air hole radius changes, which may lead to greater fabrication difficulties
In addition, this structure is a static structure, which does not realize the short coupling length and high extinction ratio in the "on" and "off" states of the optical switch.
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
[0017] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0018] Such as figure 1 As shown, the reconfigurable add / drop multiplexer based on two-dimensional photonic crystals designed in the present invention includes an upper waveguide 1, a lower waveguide 2, an upper waveguide 3 and a lower waveguide 4 located between the upper and lower waveguides, and a connection between the upper and lower waveguides. The curved waveguide 5 of the waveguide, the two ends of the curved waveguide 5 are respectively connected to the upper waveguide 3 and the lower waveguide 4 through the photonic crystal bending structure, and the curved waveguide 5 and the lower waveguide 2 are placed in close parallel to form a 2×2 directional coupling optical switch, The upper waveguide 1 and the lower waveguide 4 are connected through the lower microcavity 6 with point defects, and the upper waveguide 1 and th...
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 reconfigurable optical add-drop multiplexer based on a two-dimensional photonic crystal, comprising an upper end waveguide, a lower end waveguide, an upward road waveguide, a downward road waveguide, and a bend waveguide connecting the upward road waveguide and the downward road waveguide, wherein the upper end waveguide, the upward road waveguide and the downward road waveguide are respectively connected through an upward road micro-cavity and a downward road micro-cavity; a wavelength selective reflection micro-cavity is positioned between the upward road micro-cavity and the downward road micro-cavity; resonance frequencies of the three micro-cavities are the same; a ratio of Q factors of the upward road micro-cavity and the downward road micro-cavity and distances between the upward road micro-cavity and corresponding wavelength selective micro-cavity thereof and between the downward road micro-cavity and corresponding wavelength selective micro-cavity thereof meet a certain phase relationship towards the direction of the upper end waveguide, thereby implementing a complete translation of energy among the upper end waveguide, the upward road waveguide and the downward road waveguide; an add-drop multiplexer is formed together by three micro-cavities, the upper end waveguide, the upward road micro-cavity and the downward road micro-cavity, and the bend waveguide and the lower end waveguide are in a parallel placement at a short range to form a 2 multiplied by 2 directional coupling optical switch which is divided into a central coupling area, a decoupling area and an intermediate transitional chirp area, and radiuses of a dielectric cylinder close to the waveguides in the chirp area are gradually changed. The reconfigurable optical add-drop multiplexer of the invention has the advantages of small size and high integration.
Description
technical field [0001] The invention relates to a reconfigurable optical add / drop multiplexer based on two-dimensional photonic crystals, which is suitable for optical fiber communication systems and ring networks. Background technique [0002] At present, the explosive growth of data traffic in optical network nodes has caused the optical network to rapidly increase the transmission capacity of the network itself. Wavelength division multiplexing (WDM) technology can effectively use the bandwidth of optical fiber to realize large-capacity, long-distance optical fiber communication, and can increase the number of services in the user distribution system. It has been widely used in optical fiber communication systems. The optical add / drop multiplexer (OADM) allows wavelength signals to be added and dropped at optical network nodes, and is a key device for building a WDM optical communication system. Among these OADMs, a reconfigurable optical add / drop multiplexer (ROADM) can...
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 Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/293H04B10/12H04Q11/00
Inventor 任宏亮胡卫生姜淳
Owner SHANGHAI JIAOTONG UNIV