发明名称 |
OPTICAL FILTER MODULE |
摘要 |
PROBLEM TO BE SOLVED: To provide an optical filter module having good adjacent crosstalk and distributed characteristics and suitable for a DE-MUX. SOLUTION: Four gratings 5a-5d are arranged in an optical fiber 3 to form a grating forming area 6, and the reflected light wavelengths of gratings 5a-5d are made mutually different for every predetermined set interval. Optical isolators 1, 2 are connected to the optical incident side and emission side of the grating forming area 6. The optical isolator 1 of the optical incident side is made into a reflected light cutoff means to interrupt reflected light reflected by the gratings 5a-5d among incident light having a plurality of mutually different wavelengths made incident on the grating forming area 6 from returning to the optical incident side. Light having a waveband which passed all the gratings 5a-5d among the incident light is selectively emitted from the optical emission side of the grating forming area 6. This realizes a DE-MUX application module. |
申请公布号 |
JP2001305350(A) |
申请公布日期 |
2001.10.31 |
申请号 |
JP20000121988 |
申请日期 |
2000.04.24 |
申请人 |
FURUKAWA ELECTRIC CO LTD:THE |
发明人 |
YODO SHIGETO;SHINOZAKI ATSUSHI;SHIRASAKA ARIO |
分类号 |
G02B6/00;G02B6/02;G02B6/10;H04B10/2519;H04B10/40;H04B10/50;H04B10/60 |
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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