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Design of photonic band gap fibers with suppressed higher-order modes: Towards the development of effectively single mode large hollow-core fiber platforms

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/14666

Title: Design of photonic band gap fibers with suppressed higher-order modes: Towards the development of effectively single mode large hollow-core fiber platforms
Authors: Saitoh, Kunimasa Browse this author →KAKEN DB
Florous, Nikolaos J. Browse this author
Murao, Tadashi Browse this author
Koshiba, Masanori Browse this author →KAKEN DB
Keywords: Fiber design and fabrication
Fiber optics communications
Microstructure devices
Issue Date: 7-Aug-2006
Publisher: Optical Society of America
Journal Title: Optics Express
Volume: 14
Issue: 16
Start Page: 7342
End Page: 7352
Abstract: The objective of the present investigation is to propose and theoretically demonstrate the effective suppression of higher-order modes in large-hollow-core photonic band gap fibers (PBGFs), mainly for low-loss data transmission platforms and/or high power delivery systems. The proposed design strategy is based on the index-matching mechanism of central air-core modes with defected outer core modes. By incorporating several air-cores in the cladding of the PBGF with 6-fold symmetry it is possible to resonantly couple the light corresponding to higher-order modes into the outer core, thus significantly increasing the leakage losses of the higher-order modes in comparison to the fundamental mode, thus making our proposed design to operate in an effectively single mode fashion with polarization independent propagation characteristics. The validation of the procedure is ensured with a detailed PBGF analysis based on an accurate finite element modal solver. Extensive numerical results show that the leakage losses of the higher-order modes can be enhanced in a level of at least 2 orders of magnitude in comparison to those of the fundamental mode. Our investigation is expected to remove an essential obstacle in the development of large-core single-mode hollow-core fibers, thus enabling them to surpass the attenuation of conventional fibers.
Rights: © 2006 Optical Society of America, Inc.
Type: article (author version)
URI: http://hdl.handle.net/2115/14666
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 齊藤 晋聖

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