发明名称 |
Microlensed optical terminals and optical system equipped therewith, and methods for their manufacture, especially an optical coupling method and optical coupler for use therewith |
摘要 |
The tip of a first optical fiber 8 is fused integrally to a second optical fiber 7, having a single refractive index and an identical outer diameter, which has a spherical lens 10 with the length and diameter to produce a beam expansion by Gaussian diffusion to at least 80 (my)m or greater at the exit and a radius of curvature greater than 200 (my)m. The spherical part of the second fiber is formed by thermal fusion; a spherical lens having the desired diameter at the optical fiber tip is formed by feeding the optical fiber tip into a thermal fusion unit to form the spherical lens. An optical fiber terminal for optical coupling composed of a single mode optical fiber, a non-doped silica fiber beam expansion segment, and a non-doped silica spherical lens, is connected to a polarization-independent optical isolator. A ferrule support having a rotatable spherical segment formed at the tip, in which the second optical fiber and an optical fiber protecting material are inserted and stabilized in a through-hole of the ferrule support, and a coupling unit consisting of a flange and a cap, which contact with the spherical surface of the spherical segment at opposite sides after the ferrule support has been adjusted into a position which produces an optimal beam converging function.
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申请公布号 |
US5293438(A) |
申请公布日期 |
1994.03.08 |
申请号 |
US19920947565 |
申请日期 |
1992.09.21 |
申请人 |
NAMIKI PRECISION JEWEL CO., LTD. |
发明人 |
KONNO, YOSHIHIRO;TATENUMA, MASATO;KUME, HIROSHI;MIKAMI, YUKIHIKO |
分类号 |
G02B6/255;G02B6/26;G02B6/32;G02B6/42;(IPC1-7):G02B6/32 |
主分类号 |
G02B6/255 |
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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