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relationship, established equivalent relati14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units \olume rate corresponds to\onship, Then in-line solory fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measurement and units nt of com和mon units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle aonship ngle of classification (slightly) 17, and subject: geometry preliminary knowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject : Preliminary knowledge (3)-review of solid content category 1-d shapes are diviution. Categded into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids and cubes relationship between characteristics of circular cone is slightly solid surface area and vof measuremeolume 1, size 2, table ...电子科技大学中山学院考试试卷
课程名称: 光纤通信 试卷类型： A卷
20 08 —20 09 学年度第 一 学期 考试方式： 闭卷
拟题人： 何志红 日期： 12月10日 审题人： 日期：
系别： 电子工程系 班 级： 通信05A(本)、通信05B（本）
装 订 线 内 禁 止 答 题 学号： 姓 名： 题号 一 二 三 四 五 六 七 八 九 十 总分 得分 一、 填空题（每空1分，共20分）
1、 光纤通信是以（ ）为载频，以（ ）为传输介质的通信方式。 2、光纤中允许单模传输的最小光波长称为（ ）。
3、（ ）、色散和带宽是光纤最重要的传输特性，色散一般包括（ ）、材料色散和波导色散。
4、在ITU-T公布的光纤分类标准中，G.652光纤的特点是在波长1.31μm色散为（ ），G.655光纤是一种（ ）色散光纤。 5、基本光纤传输系统包括（ ）、光纤线路和（ ）三个部分。 6、在1.3μm波段通常用掺（ ）光纤放大器，1.55μm波段通常用掺（ ）光纤放大器。
7、模拟电视光纤传输系统中的SCM中文称呼为（ ）。 8、SDH自愈环结构可分为两大类：通道倒换环和（ ）倒换环。 9、光孤子的形成是光纤的群速度色散和（ ）效应相互平衡的结果。
relationship, established equivalent relati14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units \onship, Then in-line solory fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measurement and units nt of com和mon units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle aonship ngle of classification (slightly) 17, and subject: geometry preliminary knowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject : Preliminary knowledge (3)-review of solid content category 1-d shapes are diviution. Categded into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids and cubes relationship between characteristics of circular cone is slightly solid surface area and vof measuremeolume 1, size 2, table ...10、为确保波分复用系统的性能，对波分复用器的基本要求是：（ ）小，隔离度大，温度稳定性好，带内平坦，尺寸小等。
11、在光通路中防止光反射回光源，即只允许光单向传输的无源器件是（ ）。
12、光交换技术主要有：空分交换、时分交换、（ ）交换三种方式。 13、为进行系统性能研究，ITU-T建议中提出的最长标准数字HRX为（ ）km。
14、与直接检测方式比较，相干检测可以提高（ ）。 15、在光接入网中，PON指的是（ ）。
二、 选择题（在本题的每一小题的备选答案中，只有一个答案是正确的，请把你认为正确答案的题号，填入题干的括号内。多选不给分。每题2分，共20分）
1、半导体激光器的发光机理是 （ ） A、受激吸收 B、自发吸收 C、自发辐射 D、受激辐射
2、一个光纤放大器，其输入光功率为1mW，输出光功率为100mW, 则其增益为 （ ） A、10dB B、20dB C、30dB D、40dB
3、下列属于光检测器的是 （ ） A、LED B、LD C、YAG D、PIN
4、单模光纤只能传输一个模式，称为光纤的基模，即 （ ）A、HE００模 B、HE１１模 C、HE１０模 D、HE０１模
relationship, established equivalent relati14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units \onship, Then in-line solory fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measurement and units nt of com和mon units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle aonship ngle of classification (slightly) 17, and subject: geometry preliminary knowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject : Preliminary knowledge (3)-review of solid content category 1-d shapes are diviution. Categded into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids and cubes relationship between characteristics of circular cone is slightly solid surface area and vof measuremeolume 1, size 2, table ...5、光纤衰减为0.00435dB/m，则10km长光纤的总衰减为 （ ） A、0.0435dB B、1.01dB C、4.35dB D、43.5dB
6、长距离光纤通信常用的窗口是 （ ） A、 0.85 μm B、 2 μm C、1.31 μm D、1.55 μm 7、SDH线路码型一律采用 （ ） A、HDB3码 B、AIM码 C、NRZ码 D、NRZ码加扰码 8、SDH中STM－1的传输速率是 （ ） A、140.10Mb/s B、34.28Mb/s C、155.52Mb/s D、168.30Mb/s 9、一个数字光接收机的灵敏度Pr=100uW，则它的dBm值为 （ ）
A、-10dBm B、-20dBm C、10dBm D、20dBm
10、超扰比Q＝6时，误码率BER为 （ ） A、10-6 B、10－7 C、10－9 D、10－11 三、简答题（30分）
1、比较半导体激光器（LD）和发光二极管（LED）的异同。（6分）
电子科技大学中山学院试卷 第3页，共7页