发明名称 |
Method of observing the core region of optical fibers and preforms |
摘要 |
A method of observing the core region of optical fibers and fiber preforms is disclosed comprising the step of inducing fluorescence in at least one of the index-modifying dopants present in the core being observed by illuminating said fiber/preform with radiation at the peak absorption wavelength for said dopant, and observing the region between the fluorescing edges of said fiber/preform. The core diameter can be determined by measuring the distance between said edges. This technique can be utilized to control the fiber pulling rate during fabrication.
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申请公布号 |
US4307296(A) |
申请公布日期 |
1981.12.22 |
申请号 |
US19800140313 |
申请日期 |
1980.04.14 |
申请人 |
BELL TELEPHONE LABORATORIES, INCORPORATED |
发明人 |
PRESBY, HERMAN M. |
分类号 |
G01M11/00;C03B37/018;C03B37/025;C03B37/027;C03B37/03;G01B11/10;G02B6/38;(IPC1-7):G01N21/64 |
主分类号 |
G01M11/00 |
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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