Characterization of Optical Polymers for Multi-layered Electro-optic Devices PDF Download

Author: Lori Ellen Rohlev
Publisher:
ISBN:
Category : Electrooptical devices
Languages : en
Pages : 296

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Category : Aeronautics
Languages : en
Pages : 702

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Author: Karel Dusˇek
Publisher: Springer
ISBN: 3642135323
Category : Technology & Engineering
Languages : en
Pages : 294

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-Shear-Induced Transitions and Instabilities in Surfactant Wormlike Micelles By S. Lerouge, J.-F. Berret -Laser-Interferometric Creep Rate Spectroscopy of Polymers By V. A. Bershtein, P. N. Yakushev -Polymer Nanocomposites for Electro-Optics: Perspectives on Processing Technologies, Material Characterization, and Future Application K. Matras-Postolek, D. Bogdal

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Category :
Languages : en
Pages : 0

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A high-level computational analysis of two-photon absorbing derivatives of piperidone and cyclohexanone was carried out. Obtained data were compared with the experimental results. The molecular cross-section of the two-photon absorption of these compounds, as high as 3000x10(exp -50) cu cm s/photon at nanosecond pumping, makes then promising nonlinear materials for optical limiting in near-infrared region. They also exhibit an intense two-photon exciting fluorescence, of the same order as that of Phodamine B. In addition, these compounds have previously demonstrated strong anticancer effect. Both features combined in a single compound also open the way for more efficient treatment of cancer. Characterization of the infrared absorption spectrum of the solutions of fullerene C(sub 60) with 2-cyclooctylamino-5- nitropyridinee additive known as COANP has been performed with the focus on possible bonding with the amino-group of the additive. No occurrence of such bonding was found at normal conditions. Also no change of optical absorption in visible region and optical limiting of fullerene due to chemical bonding with the additive was detected even for a molar proportion of the additive to fullerene approaching 200:1. A miniature electro-optic (E-O) modulator that comprises a Fabry-Perot (F-P) etalon integrated with an optical fiber was theoretically analyzed. The estimations indicated that the finesse of the F-P cavity is a highly critical factor in achieving low driving voltage of the modulator. Thin films of E-O polymers LD-3 and polyimide were prepared using spin casting technique followed by corona poling. The electro-optic coefficient r(sub 33) was measured and found to be between 3 and 5 pm/V.

Author: Richard Hill
Publisher:
ISBN:
Category :
Languages : en
Pages : 56

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Optivision has competed a Phase I STTR project with the objective of developing highly active, electro-optic (EO) polymers tailored for use in in-line fiber photonic devices. The specific Phase I tasks were: (1) Synthesize or obtain a quantity of "development" polymer. (2) Develop suitable processing and characterization methodologies. (3) Perform device level testing of EO polymers using a polymeric in-line fiber (PILF) structure. (4) Identify suitable nonlinear optical (NLO) chromophores for resonantly enhanced EO polymers. (5) Develop a synthesis strategy for novel highly active EO polymers to be produced during Phase II. (6) Perform a high level design of a device to be built during the Phase II effort. We have successfully completed all of these tasks. We have developed new EO polyquinoline materials specifically tailored for use in PILF structures and demonstrated the use of these polymers in actual PILF devices. The new polyquinolines incorporate chromophores with large UB values and red shifted absorption peaks, resulting in polymers with EO coefficients of approximately 30 pm/V at a wavelength of 1.3 micrometers.

Author: Antonio Arthur Davis
Publisher:
ISBN:
Category : Optical wave guides
Languages : en
Pages : 192

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To fully utilize the advances of electro-optic (EO) polymer research, a detail design and model of a triple stacked poled-polymer, electro-optic waveguide modulator was developed to provide guidance in the selection of cladding layers and demonstrate how the mode conditions affect the overall device performance. Waveguide devices depend not only on the EO materials used in the core, but also on the cladding materials. In contrast to most of the research that has focused on molecular engineering of the electro-optically active materials to improve the core properties of the waveguide, this work studied the effects of cladding material properties to improve overall device performance of an electro-optic waveguide modulator. Various, commercially available polymer materials were identified and investigated for potential cladding layers according to their optical, electrical, process ability and film casting properties. A poled-polymer, strip-loaded waveguide, EO modulator is designed and analyzed in terms of single mode conditions, optical loss due to the metal electrodes, modulation efficiency, and mode size. Two designs were compared: Design 1 optimized the half-wave voltage for a single-arm modulator (Vpi = 2.5 V) with a nearly symmetric waveguide by maximizing modulation efficiency and minimizing the overall thickness of the waveguide; Design 2 optimized the insertion loss (6 dB) with a strongly asymmetric waveguide by maximizing the overall mode size to most efficiently overlap with a single mode fiber. High frequency analysis of a microstrip electrode showed a modulator with a push-pull scheme can be fabricated with half-wave voltage (Vpi) of 4.0 V for Design 1 and 5.1 V for Design 2 at 3 GHz. Some general guidelines in the design of a poled-polymer electro-optic modulator incorporating a strip-loaded waveguide structure are suggested. First, the core layer thickness and ridge width supporting single mode propagation should be fabricated as large as possible by increases the asymmetry of the refractive index between the top and bottom cladding layer. Second, the thicknesses of the top and bottom cladding layers must be optimized through an analysis of the waveguide mode amplitude distribution so that the electrode-associated optical loss is minimized to a required level while simultaneously the total thickness of the waveguide is minimized. The ridge structure greatly simplifies fabrication procedures, reduces fabrication steps and eliminates propagation losses due to roughness of etched sidewalls. The results of the analysis were modeled in beam propagation software to confirm the ideal conditions for single mode propagation.

Author: Wei Feng
Publisher:
ISBN:
Category : Integrated optics
Languages : en
Pages : 288

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Author: Liu-Ming Wu
Publisher:
ISBN:
Category :
Languages : en
Pages : 208

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Author: Karel Dusˇek
Publisher: Springer
ISBN: 9783642135330
Category : Technology & Engineering
Languages : en
Pages : 286

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Book Description
-Shear-Induced Transitions and Instabilities in Surfactant Wormlike Micelles By S. Lerouge, J.-F. Berret -Laser-Interferometric Creep Rate Spectroscopy of Polymers By V. A. Bershtein, P. N. Yakushev -Polymer Nanocomposites for Electro-Optics: Perspectives on Processing Technologies, Material Characterization, and Future Application K. Matras-Postolek, D. Bogdal

Author: Naixin Yang
Publisher:
ISBN:
Category : Electronic polymers
Languages : en
Pages : 174

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Electro-optic characterization of polymer matrix perfluorocyclobutyl (PFCB) blend system with chromophore C4 tricyanovinylidenediphenylaminobenzene (TCVDPA), and enchained system with chromophore C2 (propanedinitrile) are shown in this thesis. The poling procedures of these materials are developed. The Teng-Man instrument is used to do the material electro-optical coefficient r 33 measurement. The Teng-Man setup has been calibrated with a z-cut LiNbO3 sample and has been done a blind test with an well studied polymer material sample that is proprietary to Intel. The calibration results agree well with the literature value.