Tunable-wavelength two-dimensional photonic crystal demultiplexer based on microfluid injection technology
A two-dimensional photonic crystal and demultiplexer technology, which is applied in the directions of optical waveguides, light guides, optics, etc., can solve the problems of difficult to achieve the production level, and it is difficult for the demultiplexer to realize the output wavelength tunable, etc., to change the guided mode. Cut-off frequency, good achievability, effect of mature processing technology
Inactive Publication Date: 2011-08-24
BEIJING UNIV OF POSTS & TELECOMM
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[0004] The purpose of the present invention is to solve the problems existing in the design of photonic crystal wave demultiplexers such as when changing the photonic crystal air space or the radius of the dielectric column to realize the demultiplexer, which requires higher manufacturing process precision, and the current manufacturing level is difficult. Reach, and the demultiplexer that makes is difficult to realize the problem that the output wavelength can be tuned, thereby proposed the two-dimensional air hole photonic crystal demultiplexer that utilizes microfluidic injection technology, the present invention adopts the background medium based on SOI material to make in addition Compared with photonic crystals made of air background dielectric pillars, photonic crystals of air hole materials have better realizability and more mature processing technology
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[0033] The structure of the demultiplexer is formed by cascading four W0.9 type line waveguides, such as figure 1 .shown. The triangular lattice medium background uses the air hole photonic crystal as the basic mechanism, and then uses microfluidic technology to inject liquids with different refractive indices along the waveguide direction to form four small W0.9 waveguides, and the four waveguides are arranged in cascade. The length of the first waveguide is 5a, and the length of the other three waveguides is 7a, and then an outlet waveguide is set at the tail of each waveguide, and microfluids with the same refractive index as the waveguide where the outlet waveguide is located are injected into both sides of the outlet waveguide.
[0034] First look at the structure of the basic W0.9-type waveguide, such as figure 2 . As shown, a in the figure is the lattice constant, a=341nm, waveguide width The radius of the air hole is 0.3a, the refractive index is 1, the dielectric ...
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The invention relates to a tunable-wavelength two-dimensional photonic crystal de-multiplexer based on microfluid injection technology. In the invention, the microfluid injection technology is introduced into structure of a two-dimensional photonic crystal de-multiplexer, namely, microfluids with different refractive indexes are injected at different positions of the de-multiplexer to change cut-off frequency of guided mode of the photonic crystal so as to enable cut-off frequencies of the guided mode to differ at different positions, thereby realizing wavelength de-multiplex effect. The photonic crystal in the invention is characterized by triangular lattice medium background ventage structure, which is fit for widely-used SOI-based photonic crystal production technology and has better realizability. In addition, thanks to withdrawability of the microfluid injection technology, microfluids with different refractive indexes can be injected according to requirements to realize tunable wavelength, thereby improving adjustability of photonic crystal energy band property of finished de-multiplexers. The invention provides a realizable mini tunable-wavelength de-multiplexer for all-optical communication network, optical computer and other fields in future.
Description
technical field [0001] The invention relates to a realization method of a two-dimensional photonic crystal wave division multiplexer which utilizes microfluid injection technology and whose output wavelength can be tuned, and belongs to the field of wave division multiplexers. Background technique [0002] With the practical application of Erbium-doped Fiber Amplifier (EDFA), Wavelength Division Multiplexing (WDM) technology has developed rapidly in recent years. As the key device of WDM system, the wavelength division multiplexer has also become a hot research topic at home and abroad. At present, the research on wave division multiplexers is mainly based on the use of semiconductors (document 1.Nasu, Y.; Watanabe, K.; Itoh, M.; Yamazaki, H.; Kamei, S.; Kasahara, R.; Ogawa, I .; Kaneko, A.; Inoue, Y.; "Ultrasmall 100GHz 40-Channel VMUX / DEMUXBased on Single-Chip 2.5%-ΔPLC," Journal of Lightwave Technology, v 27, n 12, p 2087-2094, June 15, 2009) or photonic crystal fiber (...
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IPC IPC(8): G02B6/13G02B6/122
Inventor 田慧平翟羿纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM