Presentation 2008-03-07
Structural optimization of air-guiding photonic bandgap fibers for realizing ultimate low-loss waveguides
Tadashi MURAO, Kunimasa SAITOH, Masanori KOSHIBA,
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Abstract(in English) The existence of surface modes is the main drawback and the reduction of the fiber losses is not sufficient in 6-fold symmetry air-guiding photonic bandgap fibers (PBGFs). We show that the surface mode free condition is expressed as a normalized silica-ring thickness T=0.5 for any core size and the cladding structural parameters, regardless the core radius of the silica-ring is one of the main factors of dominating the surface mode's condition, and the fact that the wavelength range of the photonic bandgap (PBG) changes on varying the structural parameters of the cladding. Moreover, we propose a novel type of PBGF, namely 3-fold symmetry 27 cell-core PBGF without surface mode, which exhibits lower scattering losses caused by surface roughness of the silica-ring in comparison to 6-fold symmetry 19 cell-core PBGFs and suppresses the mode coupling between fundamental-like and higher-order modes when compared to 6-fold symmetry 37 cell-core PBGFs.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Photonic bandgap fiber / photonic crystal fiber / air-core / surface mode
Paper # OFT2007-66,OPE2007-185
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Conference Information
Committee OFT
Conference Date 2008/2/29(1days)
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Paper Information
Registration To Optical Fiber Technology (OFT)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Structural optimization of air-guiding photonic bandgap fibers for realizing ultimate low-loss waveguides
Sub Title (in English)
Keyword(1) Photonic bandgap fiber
Keyword(2) photonic crystal fiber
Keyword(3) air-core
Keyword(4) surface mode
1st Author's Name Tadashi MURAO
1st Author's Affiliation Graduate School of Information Science and Technology, Hokkaido University()
2nd Author's Name Kunimasa SAITOH
2nd Author's Affiliation Graduate School of Information Science and Technology, Hokkaido University
3rd Author's Name Masanori KOSHIBA
3rd Author's Affiliation Graduate School of Information Science and Technology, Hokkaido University
Date 2008-03-07
Paper # OFT2007-66,OPE2007-185
Volume (vol) vol.107
Number (no) 513
Page pp.pp.-
#Pages 6
Date of Issue