发明名称 |
Optical filter functioning as both a gain equalizer and noise-light blocking filter |
摘要 |
The present invention relates to an optical filter and the like, applicable to a gain equalizer for equalizing the gain of an optical amplifier as well, comprising a structure enabling a repeater and the like to have a small-sized, inexpensive configuration. This optical filter 22 has such a transmission spectrum that a ripple of 1 dB or more exists with respect to light in a communication wavelength band. This transmission spectrum is designed so as to yield a transmissivity of -10 dB or less in both of a first blocking wavelength band having a bandwidth of 20 nm or more located on the shorter wavelength side than the communication wavelength band, and a second blocking wavelength band having a bandwidth of 20 nm or more located on the longer wavelength side than the communication wavelength band. The optical filter having such a transmission spectrum can function as a filter for blocking noise light and as a gain equalizer.
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申请公布号 |
US6738183(B2) |
申请公布日期 |
2004.05.18 |
申请号 |
US20010995858 |
申请日期 |
2001.11.29 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
SHIGEHARA MASAKAZU |
分类号 |
G02B6/00;G02B5/18;G02B5/28;G02B6/02;G02B6/26;G02B6/34;H01S3/06;H01S3/067;H01S3/10;H04B10/16;H04B10/17;(IPC1-7):H01S3/00;G02B5/22 |
主分类号 |
G02B6/00 |
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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