Title:
負分散光ファイバ、広帯域光伝送路及び光伝送システム
Document Type and Number:
Japanese Patent JP4750678
Kind Code:
B2
Abstract:
To provide a negative dispersion optical fiber and the like that simultaneously reduce cumulative dispersion in the wavelength band of an optical fiber having a positive wavelength dispersion characteristic in the 1,310 and 1,550 nm wavelength band.
The negative dispersion optical fiber is obtained having a suitable negative wavelength dispersion characteristic in the 1,310 and 1,550 nm wavelength band. Specifically, the ratio D1,310/D1,550of the wavelength dispersion in the 1,310 and 1,550 nm wavelength band and the ratio D1,625/D1,550of the wavelength dispersion in the 1,625 and 1,550 nm wavelength band are each set in the range of 0.3-0.6 and 1.1-1.2 respectively. Also, the ratio of the radius a1 of a first core part to the radius (a) of a second core part Ra=a1/a is set in the range of 0.24 to 0.70; the ratio of a relative refractive index difference Δ1 of the second core part to the clad to a relative refractive index difference Δ of the first core part to the clad RΔ=Δ1/Δ is set in the range of -0.13 to -1.73; and the radius (a) of the second core part and relative refractive index difference Δ of the first core part is set in the range of 2.3-6.0 μm and 0.3-1.5%, respectively.
COPYRIGHT: (C)2008,JPO&INPIT
Inventors:
Kazuhide Nakajima
Takashi Matsui
Katsusuke Tajima
Izumi Mikawa
Kazuyuki Shiraki
Application Number:
JP2006318447A
Publication Date:
August 17, 2011
Filing Date:
November 27, 2006
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
G02B6/032; G02B6/02
Domestic Patent References:
| JP2006243423A | | | | |
| JP2002243967A | | | | |
| JP2002250834A | | | | |
| JP2001311848A | | | | |
| JP2004240390A | | | | |
Other References:
J. C. Knight, J. Arriaga, T. A. Birks, A. Ortigosa-Blanch, W. J. Wadsworth, and P. St. J. Russell,Anomalous Dispersion in Photonic Crystal Fiber,IEEE PHOTONICS TECHNOLOGY LETTERS,2000年 7月,Vol. 12, No. 7,p. 807 - 809
中島和秀、黒河賢二、田嶋克介、松井隆、辻川恭三、白木和之、三川泉,PCFの1550nm帯40Gbit/s×8波DWDM伝送特性,2006年電子情報通信学会総合大会講演論文集,日本,社団法人電子情報通信学会,2006年 3月 8日,通信2,501頁
Attorney, Agent or Firm:
Toshiro Mitsuishi
Yasuyuki Tanaka
Hiroshi Matsumoto
