发明名称 |
Optical fibre amplifier and optical amplification method |
摘要 |
An optical amplifier includes an erbium doped fiber (1) of which at least one of a core part and a clad part is doped with erbium, excitation light sources (2A, 2B) for exciting the optical fiber, optical means (3A, 3B) for inputting excitation light from the excitation light source and signal light to the Er-doped fiber, and an optical isolator. The erbium doped fiber is a 1.58 mu m band optical fiber having an equivalent fiber length as a product of a fiber length (m) and an erbium doping concentration (ppm by weight), which length provides a signal gain obtained at a wavelength of the excitation light source used for excitation of the erbium doped fiber of more than a predetermined practical reference value. <IMAGE> |
申请公布号 |
EP0848463(A2) |
申请公布日期 |
1998.06.17 |
申请号 |
EP19970310370 |
申请日期 |
1997.12.10 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
YAMADA, MAKOTO;ONO, HIROTAKA;OHISHI,YASUTAKE |
分类号 |
H01S3/067;G02B6/34;H01S3/16;H01S3/17 |
主分类号 |
H01S3/067 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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