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Electrooptical organic polymer 1 × 2MMI of beamsplitter

Author: WangChunLi
Tutor: LiaoJinKun
School: University of Electronic Science and Technology
Course: Optical Engineering
Keywords: Multimode interference Organic polymer Beamsplitter Guided mode propagation analysis Splitting ratio
CLC: TN252
Type: Master's thesis
Year: 2011
Downloads: 23
Quote: 0
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Abstract


The beam splitter in the optical fiber communication systems in passive optical network and application in photonic integrated circuits is becoming increasingly widespread. Multimode interference devices have attracted more and more attention , the self - imaging effect in multimode waveguide has been widely applied to the coupler and sub beam splitter . In recent years, the attention of the organic polymer optoelectronic devices are constantly improved and has become a hot research field of polymer photonics . This paper first introduces a multimode interference and organic electro-optic polymer research significance and its development , after a detailed analysis of the theory of multimode interference , the first multi-mode interference waveguide analysis , and then take advantage of the guided mode analysis of multi- multimode interference analysis from the imaging characteristics . 1 × 2 multi-mode interference in the beam splitter (Multimode Interference MMI) the effective refractive index distribution obtained using the effective index method (Effective Index Method EIM) , using the beam propagation method (Beam Propagation method BPM) the width of the multimode waveguide , and length optimization. Specific splitting ratio can be obtained at the output terminal according to the overlapping effect of the multimode interference . Designed a new and superior performance of the optical waveguide structure of the beam splitter in the basis of the original optical waveguide . And then analyzed on the basis of analysis of the the multimode waveguide symmetrical interference adjustable splitting ratio of 1 × 2 MMI beamsplitter . Plus electrode , if the transmission wavelength of light was 1.55 micron, will be apparent in the output end of the two single-mode waveguide light intensity transfer phenomenon , the splitting ratio of the beam splitter can be adjusted in the range of 7.6dB . The electrode on the beam splitter designed for the analysis can be a beam splitter , splitting ratio adjustable range up to 20dB. The paper also prepared on the preparation of polymer material to the beam splitter and the polarization and the measured electro-optic coefficient of the polymer after the polarization . Prepared in the reticle through the optical waveguide and the photolithography process, etc. after the waveguide structure of a beam splitter . Finally , the summary, multimode interferometer beam splitter is not a lot of investment to the commercial , I believe that in the near future , by the multimode interference stars Improvement of the technical conditions of the beam splitter , the multimode interferometer beam splitter will certainly be a large number of commercialization has brought new changes to people's lives .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Optical waveguide and integrated optics > Waveguide
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