公开(公告)号：US07254337B1

公开(公告)日：2007-08-07

申请号：US11383686

申请日：2006-05-16

申请人： Mohammed N. Islam ,  Andrzej Kaminski ,  Herve A. Fevrier ,  Carl A. DeWilde ,  Ozdal Boyraz

发明人： Mohammed N. Islam ,  Andrzej Kaminski ,  Herve A. Fevrier ,  Carl A. DeWilde ,  Ozdal Boyraz

IPC分类号： H04J14/02

CPC分类号： H04J14/0291 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0213 ,  H04J14/0279

摘要： An optical communication system includes a plurality of optical add/drop multiplexers (OADMs). The plurality of OADMs includes at least five low distortion OADMs. Each OADM is coupled between spans of a multiple span communication link and operable to receive a multiple wavelength signal. The multiple wavelength signal includes a plurality of bands of wavelength signals each separated from other bands of wavelength signals by one or more guard-channels. In one embodiment, each of the at least five low distortion OADMs adds/drops a common first band of wavelengths to/from the multiple wavelength signal. In some embodiments, a spectral distortion associated with a pass-through wavelength signal spectrally adjacent to one of the one or more guard-channels is no more than three decibels after exiting the last of the plurality of low distortion OADMs. In those embodiments, the guard-channel is adjacent to the first band of wavelengths.

摘要翻译： 光通信系统包括多个光分插复用器（OADM）。 多个OADM包括至少五个低失真OADM。 每个OADM耦合在多跨度通信链路的跨度之间并且可操作以接收多波长信号。 多波长信号包括波长信号的多个波段，每个波长信号波段由波长信号的其它波段与一个或多个保护通道分离。 在一个实施例中，至少五个低失真OADM中的每一个向多波长信号/从多波长信号添加/丢弃公共第一波长带。 在一些实施例中，与在一个或多个保护信道之一频谱相邻的通过波长信号相关联的频谱失真在离开多个低失真OADM中的最后一个之后不超过三个分贝。 在那些实施例中，保护信道与第一波长带相邻。

公开(公告)号：US4163087A

公开(公告)日：1979-07-31

申请号：US843703

申请日：1976-10-19

申请人： Zbigniew Brzozowski ,  Jedrzej Kielkiewicz ,  Gabriel Rokieki ,  Andrzej Kaminski ,  Danuta Chomicz ,  Boguskaw Goraj

发明人： Zbigniew Brzozowski ,  Jedrzej Kielkiewicz ,  Gabriel Rokieki ,  Andrzej Kaminski ,  Danuta Chomicz ,  Boguskaw Goraj

IPC分类号： C08G18/48 ,  C08G18/64 ,  C08G59/14 ,  C08G18/14 ,  C08G18/32

CPC分类号： C08G18/6407 ,  C08G18/4879 ,  C08G59/1427 ,  C08G2101/0025 ,  C08G2101/0058 ,  C08G2101/0066 ,  C08G2101/0083 ,  C08G2170/60 ,  Y10T428/31565 ,  Y10T428/31605

摘要： Method for production of new, thermal and chemical resistant polyurethane plastics, particularly in the form of foams, these foams being obtained from the reaction of di- or poly- isocyanates with polyols, said polyols having the formula 1 or 2 as herein described, Ar in the said formulas representing a benzene, naphthalene or anthracene ring, which may be singly or multiply substituted with a halogen atom, alkyl radical, aryl radical or allyl radical, Z representing the oxygen atom, a group SO.sub.2 or a divalent radical --CRR.sub.1 -- where R and R.sub.1 represent a hydrogen atom or an alkyl radical, m and r represent 0 or 1, and n and p represent an integer 1-10, or their mixtures with other low-viscosity polyols or with a compound having formula 3 as herein described in which R.sub.2 represents a simple or branched alkyl or aryl radical which can be substituted by a lower alkyl or aryl radical or by halogen atoms added in a quantity of 0.1-50 parts by weight, these being reacted with isocyanates or in the presence of catalysts, foaming agents and solvents.

摘要翻译： 特别是以泡沫形式生产新的耐热耐化学性聚氨酯塑料的方法，这些泡沫是由二 - 或多异氰酸酯与多元醇的反应获得的，所述多元醇具有如本文所述的式1或2，Ar 所述式表示苯，萘或蒽环，其可以被卤素原子，烷基，芳基或烯丙基单取代或多取代，Z代表氧原子，基团SO2或二价基团-CRR1- 其中R和R 1表示氢原子或烷基，m和r表示0或1，n和p表示整数1-10，或它们与其它低粘度多元醇或与本文中具有式3的化合物的混合物 其中R 2表示可以被低级烷基或芳基取代的简单或支化的烷基或芳基，或以0.1-50重量份的量加入的卤素原子，它们与异氰酸酯反应或在 催化剂，发泡剂和溶剂的存在。