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Title:
INTERMODE LOSS DIFFERENCE COMPENSATION FIBER, OPTICAL AMPLIFIER, AND TRANSMISSION PATH DESIGN METHOD
Document Type and Number:
WIPO Patent Application WO/2020/032016
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an intermode loss difference compensation fiber, an optical amplifier, and a transmission path design method which make it possible to reduce an MDL while eliminating the need for precise alignment work by a simple structure. This intermode loss difference compensation fiber is configured to cause an excessive loss in a desired propagation mode by forming a hollow portion or a ring-shaped high refractive index portion in an optical fiber core. By providing the hollow or ring-shaped high refractive index portion in part of a profile of the core, a specific mode electric field distribution propagating through this fiber can be controlled, thereby making it possible to cause a different loss in each propagation mode at an interface between the hollow portion or ring-shaped high refractive index portion and a region not having such portion.

Inventors:
YAMASHITA YOKO (JP)
WADA MASAKI (JP)
MATSUI TAKASHI (JP)
NAKAJIMA KAZUHIDE (JP)
Application Number:
PCT/JP2019/030877
Publication Date:
February 13, 2020
Filing Date:
August 06, 2019
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G02B6/02; G02B6/032; G02B6/036; H01S3/10; H04B10/07; H04B10/2581; H04J14/04
Domestic Patent References:
WO2018025847A12018-02-08
WO2018008635A12018-01-11
Foreign References:
JP2016537659A2016-12-01
US6434311B12002-08-13
US20070206912A12007-09-06
JP2005266808A2005-09-29
JP2017157757A2017-09-07
Attorney, Agent or Firm:
OKADA, Kenji et al. (JP)
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