发明名称 |
Optical amplifier for wide band raman amplification of wavelength division multiplexed (WDM) signal lights |
摘要 |
<p>A Raman amplifier providing a wideband gain for use in a wavelength division multiplexing (WDM) optical communication system. In one embodiment, a first optical amplifier Raman amplifies a wavelength division multiplexed signal light in both a first wavelength band and a second wavelength band in accordance with a plurality of excitation lights provided to the first optical amplifier, the first and second wavelength bands being different from each other. A divider divides the amplified signal light into first and second lights in the first and second wavelength bands, respectively. A second optical amplifier amplifies the first light and has a gain band in the first wavelength band. The third optical amplifier amplifies the second light and has a gain in the second wavelength band. In various embodiments, a gain equalizer and/or an optical isolator is used in combination with the first optical amplifier providing the Raman amplification. A controller is also provided to control the excitation lights provided to the first optical amplifier to achieve specific effects. <IMAGE></p> |
申请公布号 |
EP1187276(A2) |
申请公布日期 |
2002.03.13 |
申请号 |
EP20010119758 |
申请日期 |
2001.08.28 |
申请人 |
FUJITSU LIMITED |
发明人 |
ONAKA, MIKI;TANAKA, TOMOTO;HAYASHI, ETSUKO;SUGAYA, YASUSHI;KINOSHITA, SUSUMU |
分类号 |
G02F1/35;H01S3/06;H01S3/067;H01S3/0941;H01S3/10;H01S3/131;H01S3/30;H01S5/14;H04B10/07;H04B10/29;H04B10/294;H04J14/00;H04J14/02;(IPC1-7):H01S3/30;H04B10/17 |
主分类号 |
G02F1/35 |
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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