List G.652, G.653, G.654, G.655, G.656 fiber in a table，including Chinese and English names, and their characters.
List G.652, G.653, G.654, G.655, G.656 fiber in a table，including Chinese and English names, and their characters.
参考答案和解析
G.652光纤也称作非色散位移光纤，岂非色散波长位于1.31um，在1.55um波长处衰减最小，G.652通常被称为“标准单模光纤”或“1.31um性能最佳单模光纤”，我国已敷设的光纤绝大多数是G.652光纤；G.652光纤广泛应用与数据通信和模拟图像传输。G.653光纤称作色散位移光纤，可以将最小色散点从1310nm处位移到1550nm处，实现在1550nm处有最低的衰减和零色散，并且在掺饵光纤放大器工作波长区内，适用于长距离单信道高速光放大系统。
相关考题：
ITU－T已规范了4种类型的单模光纤,即G.652光纤、G.653光纤、G.654光纤和G.655光纤。接入光缆网中常用()。 A.G.652光纤B.G.653光纤C.G.654光纤D.G.655光纤
Both Chinese names and English names give clues about place identity, family relationship, ethnic group, parents' expectation and values or even personal(). A、mistakesB、characteristicsC、replacementD、analysis
perhaps the most common way for chinese learners of english to learn vocabulary is through memorisation of a list of words and their chinese equivalents with a lot of oral repetitions of each word. ()此题为判断题(对，错)。
When defining a referential constraint between the parent table T2 and the dependent table T1, which of the following is true?() A.The list of column names in the FOREIGN KEY clause can be a subset of the list of column names in the primary key of T2 or a UNIQUE constraint that exists on T2.B.The list of column names in the FOREIGN KEY clause can be a subset of the list of column names in the primary key of T1 or a UNIQUE constraint that exists on T1.C.The list of column names in the FOREIGN KEY clause must be identical to the list of column names in the primary key of T2 or a UNIQUE constraint that exists on T2.D.The list of column names in the FOREIGN KEY clause must be identical to the list of column names in the primary key of T1 or a UNIQUE constraint that exists on T1.
光传输使用的光纤目前常见的有G.652、G.653、G.654和G.655，下列描述错误的是（）。A、我国大量铺设的为G.652光纤B、都是单模光纤C、最适合波分使用的是G.655光纤D、G.653和G.654光纤没有商用价值
ITU-T已规范了4种类型的单模光纤，即G.652光纤、G.653光纤、G.654光纤和G.655光纤。接入光缆网中常用（）。A、G.652光纤B、G.653光纤C、G.654光纤D、G.655光纤
下面（）光纤可应用用于10Gbit/s以上速率DWDM传输，是大容量传输，DWDM系统用光纤的理想选择。A、G.652（非色散位移）B、G.654光纤（最低衰减单模光纤）C、G.655（非零色散位移）
下面关于G.652和G.655光纤的描述正确的是（）A、G.652光纤比G.655光纤的衰耗小；B、G.652光纤和G.655光纤都利于克服四波混频效应；C、G.652光纤和G.655光纤都利于高比特长距离传输；D、G.652光纤比G.655光纤色散小
（）基本设计思想是在1550nm窗口工作波长区具有合理的较低的色散，足以支持：10Gbit／s的长距离传输而无需色散补偿，从而节省了色散补偿器及其附加光放大器的成本。A、G．652常规单模光纤B、G．653色散位移单模光纤C、G．654非零色散位移光纤D、G．655非零色散位移光纤
单选题When defining a referential constraint between the parent table T2 and the dependent table T1, which of the following is true?（）AThe list of column names in the FOREIGN KEY clause can be a subset of the list of column names in the primary key of T2 or a UNIQUE constraint that exists on T2.BThe list of column names in the FOREIGN KEY clause can be a subset of the list of column names in the primary key of T1 or a UNIQUE constraint that exists on T1.CThe list of column names in the FOREIGN KEY clause must be identical to the list of column names in the primary key of T2 or a UNIQUE constraint that exists on T2.DThe list of column names in the FOREIGN KEY clause must be identical to the list of column names in the primary key of T1 or a UNIQUE constraint that exists on T1.