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1. 发明授权

US4555175A Measuring compression of cabled optical fibers 失效
标题翻译：电缆光纤的测量压缩
公开(公告)号：US4555175A
公开(公告)日：1985-11-26
申请号：US475620
申请日：1983-03-15
申请人： William B. Gardner , Parbhubhai D. Patel , Dan L. Philen , Manuel R. Santana
发明人： William B. Gardner , Parbhubhai D. Patel , Dan L. Philen , Manuel R. Santana
IPC分类号： G01B11/02
CPC分类号： G01B11/02
摘要： Compressive strain in cabled optical fibers can cause buckling of the fibers and resulting microbending loss. To measure the longitudinal compression in cabled optical fibers, a modulated laser beam is directed through a first fiber and looped back to the origin by a second fiber. Next, the cable is stretched until tensile strain is indicated by a change in phase of the modulated signal. The amount of stretching required indicates the degree of compression on the fibers in the unstretched cable, and hence the amount of excess length of fiber in the cable. To measure excess fiber in relatively long lengths of cable, a portion of the cable can remain reeled, and the strain applied to the unreeled portion. A correction factor can be determined for slippage between the fiber and sheath in the reeled portion.
摘要翻译：电缆光纤中的压缩应变可能导致纤维的弯曲并导致微弯损失。为了测量电缆光纤中的纵向压缩，调制的激光束被引导通过第一光纤并通过第二光纤环回原点。接下来，电缆被拉伸直到拉伸应变由调制信号的相位变化表示。所需的拉伸量表示未拉伸电缆中的纤维上的压缩程度，因此在电缆中的纤维过长的量。为了测量较长长度的电缆中的多余纤维，电缆的一部分可以保持卷绕，并且应变施加到未拉伸部分。可以确定卷绕部分中的纤维和护套之间的滑动的校正因子。

2. 发明授权

US06118523A High-resolution zero-dispersion wavelength mapping in single mode fiber 失效
标题翻译：单模光纤中的高分辨率零色散波长映射
公开(公告)号：US06118523A
公开(公告)日：2000-09-12
申请号：US253824
申请日：1999-02-19
申请人： Igal M. Brener , David J. Thomson , Partha P. Mitra , Daniel D. Lee , Dan L. Philen
发明人： Igal M. Brener , David J. Thomson , Partha P. Mitra , Daniel D. Lee , Dan L. Philen
IPC分类号： H04B10/18 , G01N21/00
CPC分类号： H04B10/2563
摘要： An accurate and simplified method of non-destructively measuring the zero-dispersion wavelength along the length of a single-mode fiber is disclosed. The method includes the steps of measuring the FWM intensity of the optical fiber at a plurality of wavelengths, plotting the measured FWM intensity at each of the plurality of wavelengths to obtain a curve representative of the FWM intensity of each of the plurality of wavelength, and performing a non-linear inversion on the curve to obtain the zero-dispersion wavelength along the length of the fiber.
摘要翻译：公开了一种对单模光纤长度进行非破坏性测量零色散波长的精确和简化的方法。该方法包括以下步骤：测量在多个波长处的光纤的FWM强度，绘制在多个波长中的每个波长处测量的FWM强度，以获得表示多个波长中每个波长的FWM强度的曲线，以及在曲线上进行非线性反演以获得沿着光纤长度的零色散波长。

3. 发明授权

US4974926A Underwater optical fiber cable 失效
标题翻译：水下光缆
公开(公告)号：US4974926A
公开(公告)日：1990-12-04
申请号：US334649
申请日：1989-04-06
申请人： John J. Blee , Nathan E. Hardwick, III , LaVerne C. Hotchkiss , Dan L. Philen
发明人： John J. Blee , Nathan E. Hardwick, III , LaVerne C. Hotchkiss , Dan L. Philen
IPC分类号： G02B6/44
CPC分类号： G02B6/4427 , G02B6/4492
摘要： An underwater optical fiber cable (20) which is substantially free of hydrogen generation includes a core portion (22) which includes an optical transmission medium and which may comprise a terrestrial cable and a sheath system which may be an oversheath for the terrestrial cable. An outer portion of the sheath system includes a plurality of longitudinally extending strength members (42--42) each being made of a metal having a relatively low chemical or electrochemical reactivity. Covering individually each strength member is a plastic material (60) such as polyethylene.

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