Title:
【発明の名称】ファイバレーザ媒質およびこれを用いた光増幅器
Document Type and Number:
Japanese Patent JP2857218
Kind Code:
B2
Abstract:
PURPOSE:To obtain the light of a 1.3mum band with high efficiency, and to enable connection with a fiber for infrared light for optical communication in low coupling loss by using the fluoride glass fiber simultaneously containing specific quantities of Nb and Eu in a core section. CONSTITUTION:The composition of a fiber laser medium is composed of ZrF4=50-58mol%, BaF2=33-36mol%, LaF3=3-6mol% and AlF3=2-5mol%, and both NbF3 and EuF3 are brought to 1mol% or less The core diameter of the fluoride fiber is set at 5.5-7.5mum, a clad diameter at 125mum and a cutoff wavelength at 0.78-0.80. Excitation light 4 input to a synthesizer 6 through an optical fiber 5 is brought to approximately 95% of intensity, where a laser medium 1 begins to oscillate, laser beams 2 as an optical signal are input to the synthesizer 6 through an optical fiber 3, and an optical signal amplified is taken out of the laser medium 1 coupled with the output end of the synthesizer.
Inventors:
SUGAWA TOMONORI
MYAJIMA YOSHIAKI
KOMUKAI TETSUO
MYAJIMA YOSHIAKI
KOMUKAI TETSUO
Application Number:
JP10319690A
Publication Date:
February 17, 1999
Filing Date:
April 20, 1990
Export Citation:
Assignee:
NIPPON DENSHIN DENWA KK
International Classes:
G02B6/00; C03C3/32; C03C4/12; G02B6/02; G02F1/00; G02F1/35; G02F1/355; H01S3/06; H01S3/07; H01S3/094; H01S3/17; (IPC1-7): H01S3/17; C03C4/12; G02B6/00; H01S3/07
Domestic Patent References:
| JP22197A |
Attorney, Agent or Firm:
Akihide Sugimura (1 outside)