发明名称 |
Multiplexsystem using a GRIN lens and a filter |
摘要 |
<p>In an optical system in which light output from an optical fiber (11) is collimated into parallel light rays by a gradient index rod lens (13), reflected by a filter (4) and then converged again by the rod lens (13) so that the resulting light is coupled to an optical fiber (12), a principal beam component of the light output from the optical fiber (11) disagrees with an optical axis (32) of the optical fiber (12) to thereby cause a coupling loss. When W is the distance between optical axes (31 and 32) of optical fibers (11 and 12) and Z is the length of a rod lens (13) on an optical axis (33) of the rod lens, the optical fibers (11 and 12) and the rod lens (13) are disposed to satisfy the condition: <DF>W.g.(0.25 - Z/P)<2> ≤ 6 x 10<-5> </DF> in which g is a gradient index distribution coefficient of the rod lens, and P is the periodic length of the rod lens (13). <IMAGE></p> |
申请公布号 |
EP1253450(A2) |
申请公布日期 |
2002.10.30 |
申请号 |
EP20020009264 |
申请日期 |
2002.04.26 |
申请人 |
NIPPON SHEET GLASS CO., LTD. |
发明人 |
KITTAKA, SHIGEO;OIKAWA, MASAHIRO |
分类号 |
G02B6/293;G02B6/32;G02B6/34;(IPC1-7):G02B6/293 |
主分类号 |
G02B6/293 |
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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