发明名称 |
Bidirectional fiber optic systems |
摘要 |
A bidirectional fiber optic system is described in which at one terminal the output radiation of a light source (LED or semiconductor laser) is coupled through a small diameter hole in the active area of a photodiode into the core of a larger diameter transmission fiber. On the other hand, radiation propagating through the fiber in the opposite direction exits from the fiber with a large numerical aperture so that most of it is incident on the active area of the photodiode and little is lost through the hole. Also described are a number of photodiode configurations for use in such a system, as well as dual photodiodes to perform both signal detection and output monitoring functions. Further described are fiber optic sensing systems for monitoring such variables as blood pressure.
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申请公布号 |
US4709413(A) |
申请公布日期 |
1987.11.24 |
申请号 |
US19850744465 |
申请日期 |
1985.06.13 |
申请人 |
AMERICAN TELEPHONE AND TELEGRAPH COMPANY, AT&T BELL LABORATORIES |
发明人 |
FORREST, STEPHEN R.;LIEBERMAN, ROBERT A.;PANOCK, RICHARD L. |
分类号 |
G02B6/42;H04B10/24;(IPC1-7):H04B9/00;C12M1/34;A61B5/02 |
主分类号 |
G02B6/42 |
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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