Title:
【発明の名称】希土類元素添加マルチコア光ファイバ、およびそれを利用した光増幅器
Document Type and Number:
Japanese Patent JP3091875
Kind Code:
B2
Abstract:
PURPOSE:To provide a multicore optical fiber containing rare earth elements which is capable of amplifying the incident signal light on the inside of the cores even if electric power of the signal light large and realizing a multidistribution transmission system and enables efficient use of exciting light. CONSTITUTION:This multicore optical fiber 1 containing rare earth elements is formed by embedding the plural cores 3 in the single clad 2 and composing the plural cores 3 of glass contg. the rare earth elements. The process for production thereof comprises bundling and inserting plural core rods into a quartz glass tube, heating these core rods and subjecting the quartz glass tube to compression fusing to embed the core rods to produce a preform, then heating this preform and stretching and drawing the preform. The optical amplifier is formed by connecting an optical multiplexer to the incident side of the multicore optical fiber 1 containing rare earth elements and connecting an optical distribution type coupler to the output side.
Inventors:
Atsushi Abe
Kazuo Kamiya
Katsuyuki Imoto
Kazuo Kamiya
Katsuyuki Imoto
Application Number:
JP18024494A
Publication Date:
September 25, 2000
Filing Date:
August 01, 1994
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
Hitachi Cable Ltd.
Hitachi Cable Ltd.
International Classes:
G02B6/26; G02B6/00; G02B6/02; G02F1/35; H01S3/06; H01S3/07; H01S3/10; H01S3/17; (IPC1-7): G02B6/26; G02B6/00; G02B6/16; G02F1/35; H01S3/07; H01S3/10; H01S3/17
Domestic Patent References:
| JP5345632A | ||||
| JP55127502A |
Attorney, Agent or Firm:
Yoshio Komiya