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1.发明授权Optical fiber communication system employing doped optical fiber and Raman amplification 有权采用掺杂光纤和拉曼放大的光纤通信系统公开(公告)号：US06711359B1
公开(公告)日：2004-03-23
申请号：US09266093
申请日：1999-03-10
IPC分类号： H04B1017
CPC分类号： H04B10/297 , H04B10/2916
摘要： A lightwave communication system is provided that includes first and second optical transmitters/receivers remotely located with respect to one another. First and second optical transmission paths couple the first transmitter/receiver to the second transmitter/receiver for bidirectionally transmitting optical information therebetween. First and second doped optical fibers are respectively disposed in the first and second optical transmission paths. Optical pump energy is supplied by first and second optical pump sources. The first optical pump source generates Raman gain in the first transmission path and the second optical pump source generates Raman gain in the second transmission path. A first optical coupler is provided for optically coupling pump energy from the first pump source to the second-doped optical fiber and a second optical coupler is provided for optically coupling pump energy from the second pump source to the first doped optical fiber.
摘要翻译： 提供了一种光波通信系统，其包括相对于彼此远程定位的第一和第二光发射机/接收机。 第一和第二光传输路径将第一发射机/接收机耦合到第二发射机/接收机，用于双向传输光信息。 第一和第二掺杂光纤分别设置在第一和第二光传输路径中。 光泵浦能源由第一和第二光泵源提供。 第一光泵浦源在第一传输路径中产生拉曼增益，第二光泵浦源在第二传输路径中产生拉曼增益。 提供第一光耦合器用于将来自第一泵浦源的泵浦能量光耦合到第二掺杂光纤，并且提供第二光耦合器用于将来自第二泵浦源的泵浦能量光耦合到第一掺杂光纤。
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2.发明授权
公开(公告)号：US5052025A
公开(公告)日：1991-09-24
申请号：US572740
申请日：1990-08-24
CPC分类号： H04J3/076 , H04L5/24 , Y10S370/907
摘要： Improved jitter performance is realized in a desynchronizer for obtaining an asynchronous digital signal, e.g., a DS3 signal, from a received synchronous digital signal, e.g., a SONET STS-1 signal. The improved jitter performance results from the use of a unique adaptive bit leaking arrangement in conjunction with a digital phase locked loop and synchronizing elastic store. An estimate of a bit leaking interval is adaptively obtained based on the intervals between a sequence of consecutive pointer adjustments in the received signal, i.e., the STS-1 signal. In one embodiment, the bit leaking interval estimate is obtained by employing a moving average of the intervals between the pointer adjustments. The desired bit leaking is effected by employing an accumulator which is responsive to the received pointer adjustments and a representation of the estimated bit leaking interval, in conjunction with a comparator. The accumulator output count is supplied to the comparator along with the current write address of the elastic store. Leak bits are supplied as an output from the comparator one at a time to the phase locked loop which, in turn, generates a smooth read clock for the elastic store.
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