公开(公告)号：US5142401A

公开(公告)日：1992-08-25

申请号：US545251

申请日：1990-06-28

申请人： Nelson M. Shen ,  Vinh P. Le

发明人： Nelson M. Shen ,  Vinh P. Le

IPC分类号： H03F3/08 ,  H04B10/158

CPC分类号： H04B10/6973 ,  H03F3/087 ,  H04B10/6911

摘要： An optical receiver includes a photodetecting device and a wide band video amplifier. The photodetecting device and the video amplifier are coupled by reactive elements which are selected to provide a highly linear and highly sensitive response over a frequency range of approximately 400-950 MHz. The crosstalk between two signals are ten parts per billion when the laser power is at 1 milliwatt and modulation is 25 percent per signal. The noise generated by the receiver is only equivalent to 6 billionth of an ampere. The receiver uses commerically available components.

摘要翻译： 光接收机包括光电检测器件和宽带视频放大器。 光电检测装置和视频放大器由无功元件耦合，其被选择以在大约400-950MHz的频率范围内提供高度线性和高灵敏度的响应。 当激光功率为1毫瓦且每个信号调制为25％时，两个信号之间的串扰为十分之十。 接收机产生的噪声只相当于安培的六十分之一。 接收机使用商业可用的组件。

公开(公告)号：US4705347A

公开(公告)日：1987-11-10

申请号：US794342

申请日：1985-10-31

申请人： Nelson M. Shen ,  Marc F. Moisson ,  John P. Arrington ,  AbdulMohamed Tayeb

发明人： Nelson M. Shen ,  Marc F. Moisson ,  John P. Arrington ,  AbdulMohamed Tayeb

IPC分类号： G02B6/42 ,  G02B6/26

CPC分类号： G02B6/4201 ,  G02B6/4289 ,  G02B6/4286

摘要： An optical coupler for withdrawing light from an optical fiber includes first and second movable members on which are mounted a plurality of bending posts offset longitudinally relative to one another. A retaining post, offset longitudinally from the bending posts, has a groove therein so that an optical fiber can be wrapped therearound. Thereafter, the first and second members are moved towards each other such that the bending posts interleaf and bend the optical fiber in a plurality of positions causing light to be emitted from the optical fiber at bent portions thereof, which light is detected by optical detectors located behind the bending posts.

摘要翻译： 用于从光纤中取出光的光耦合器包括第一和第二可移动部件，多个弯曲柱安装在其上，所述多个弯曲柱相对于彼此纵向偏移。 从弯曲柱纵向偏移的保持柱在其中具有凹槽，使得光纤可以被包裹在其周围。 此后，第一和第二构件彼此移动，使得弯曲柱在多个位置插入并弯曲光纤，导致在其弯曲部分处从光纤发射光，该光被位于 在弯曲的后面。

公开(公告)号：US4634274A

公开(公告)日：1987-01-06

申请号：US630921

申请日：1984-07-16

申请人： Nelson M. Shen ,  Robert Zimmerman

发明人： Nelson M. Shen ,  Robert Zimmerman

IPC分类号： G01M11/00 ,  G01N21/59 ,  G01N21/84

CPC分类号： G01M11/33 ,  G01M11/35

摘要： A method and apparatus for determining optical power attenuation across a splice between first and second optical fibers utilizes the algorithm:dB=10 log (1-L.sub.tel) (2)where L.sub.tel is determined by compensating for differences in intensity profiles existant in the first optical fiber when injecting light therein for purposes of measuring attenuation versus the intensity profile created when injecting light into the first fiber for transmitting telecommunications data and the light has been propagating in the fiber for a distance and steady state intensity distribution is achieved. Preferably, a numerical aperture of the first optical fiber and a sample optical fiber are empirically determined, and L.sub.tel is calculated by compensating for differences between these numerical apertures.

摘要翻译： 用于确定第一和第二光纤之间的接头的光功率衰减的方法和装置利用以下算法：dB = 10log（1-Ltel）（2）其中Ltel通过补偿第一光学中存在的强度分布的差异来确定 为了测量衰减与将光注入到第一光纤中以发射电信数据而产生的强度分布的目的，光在其中注入光，并且光已经在光纤中传播一段距离并且稳态强度分布。 优选地，根据经验确定第一光纤和样本光纤的数值孔径，并且通过补偿这些数值孔径之间的差异来计算Ltel。