Title:
フォトニックバンドギャップファイバ
Document Type and Number:
Japanese Patent JP4452756
Kind Code:
B2
Abstract:
A photonic band-gap fiber comprises a first core having a refractive index that is not higher than a refractive index of a clad; a second core that is disposed so as to surround the first core and has a refractive index that is lower than the refractive index of the first core; a clad that surrounds the second core; and a periodic structure portion that is disposed in the clad in a vicinity of the second core and is constituted by high-refractive index portions that have a refractive index higher than that of clad and form the periodic structure, and the periodic-structure portion functions as a wave-length filter. By the function of the periodic structure portion as a wave-length filter, it is possible to reduce the propagation loss of the transmission wavelength and increase the propagation loss of the cutoff wavelength.
Inventors:
Ryuichiro Goto
Application Number:
JP2008541531A
Publication Date:
April 21, 2010
Filing Date:
February 28, 2008
Export Citation:
Assignee:
Fujikura Ltd.
International Classes:
G02B6/00; G02B6/036; H01S3/06
Domestic Patent References:
| JP2006011328A | 2006-01-12 | |||
| JP2000035521A | 2000-02-02 | |||
| JP2003222739A | 2003-08-08 | |||
| JP2003229618A | 2003-08-15 | |||
| JP2002237637A | 2002-08-23 | |||
| JP2005025056A | 2005-01-27 | |||
| JP2006126725A | 2006-05-18 |
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Tadashi Takahashi
Takashi Watanabe