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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 16 — Aug. 7, 2006
  • pp: 7342–7352

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

Kunimasa Saitoh, Nikolaos John Florous, Tadashi Murao, and Masanori Koshiba  »View Author Affiliations


Optics Express, Vol. 14, Issue 16, pp. 7342-7352 (2006)
http://dx.doi.org/10.1364/OE.14.007342


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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.

© 2006 Optical Society of America

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2330) Fiber optics and optical communications : Fiber optics communications
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Photonic Crystal Fibers

History
Original Manuscript: June 15, 2006
Revised Manuscript: July 18, 2006
Manuscript Accepted: July 21, 2006
Published: August 7, 2006

Citation
Kunimasa Saitoh, Nikolaos J. Florous, Tadashi Murao, and Masanori Koshiba, "Design of photonic band gap fibers with suppressed higher-order modes: Towards the development of effectively single mode large hollow-core fiber platforms," Opt. Express 14, 7342-7352 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-16-7342


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References

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