Title:
OPTICAL FIBER DESIGN METHOD
Document Type and Number:
WIPO Patent Application WO/2016/167080
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a beam propagation method that makes it possible to meet requirements regarding a desired output power, propagation distance, and beam quality; and an optical fiber design method for designing the structure of an optical fiber. In the present invention, the structure of an optical fiber is determined by calculating an effective core cross-sectional area Aeff on the basis of desired specifications and adjusting, as appropriate, the structure and the number of propagated modes of an optical fiber satisfying said core cross-sectional area Aeff. It is thus possible to achieve long-range propagation of high-output laser light while maintaining beam quality by controlling the excitation ratio of a high-order mode when coupling laser light to an optical fiber designed in this manner.
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Inventors:
MATSUI TAKASHI (JP)
TSUJIKAWA KYOZO (JP)
YAMAMOTO FUMIHIKO (JP)
HANZAWA NOBUTOMO (JP)
TSUJIKAWA KYOZO (JP)
YAMAMOTO FUMIHIKO (JP)
HANZAWA NOBUTOMO (JP)
Application Number:
PCT/JP2016/058864
Publication Date:
October 20, 2016
Filing Date:
March 18, 2016
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G02B6/02; G02B6/032
Foreign References:
| JP2010129886A | 2010-06-10 | |||
| JP2010541006A | 2010-12-24 |
Other References:
MICHALIS N. ZERVAS; ET AL.: "High Power Fiber Lasers: A Review", IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, vol. 20, no. 5, October 2014 (2014-10-01), XP011549864
JENS LIMPERT ET AL.: "The Rising Power of Fiber Lasers and Amplifiers", IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, vol. 13, no. 3, June 2007 (2007-06-01), pages 537 - 545, XP011185693
HIDEHIKO YODA ET AL.: "Beam quality factor of higher order modes in a step-index fiber", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 24, no. 3, March 2006 (2006-03-01), pages 1350 - 1355, XP055321552
JENS LIMPERT ET AL.: "The Rising Power of Fiber Lasers and Amplifiers", IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, vol. 13, no. 3, June 2007 (2007-06-01), pages 537 - 545, XP011185693
HIDEHIKO YODA ET AL.: "Beam quality factor of higher order modes in a step-index fiber", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 24, no. 3, March 2006 (2006-03-01), pages 1350 - 1355, XP055321552
Attorney, Agent or Firm:
OKADA, Kenji et al. (JP)
Kenji Okada (JP)
Kenji Okada (JP)
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