尔雅Optical Fiber Communications Engineering_1章节答案(学习通2023完整答案)
32 min read尔雅Optical Fiber Communications Engineering_1章节答案(学习通2023完整答案)
What is 尔雅an Optical Fiber Communication System?随堂测验
1、"Optical fiber communication" refers to ( )
A、节答A communication mode in which radio waves are used as carriers and optical fibers are used as transmission media.
B、案学A communication mode in which optical waves are used as carriers and optical fibers are used as transmission media.
C、习通A communication mode in which optical waves are used as carriers and cables are used as transmission media.
D、完整A communication mode in which laser is 答案used as carriers and optical fibers are used as transmission media.
2、The尔雅 three wavelengths used in optical fiber communication are ( )
A、λ=0.85um，节答λ=1.20um，案学λ=1.80um
B、习通λ=0.80um，完整λ=1.51um，答案λ=1.80um
C、尔雅λ=0.85um，节答λ=1.31um，案学λ=1.55um
D、λ=0.85um，λ=1.20um，λ=1.80um
3、The function of the photodetector is ( )
A、Convert an optical signal into an electrical signal
B、Convert an electrical signal into an optical signal
C、Amplify electrical signal
D、Amplify optical signal
4、The spectrum of optical fiber communication belongs to ( )
A、Visible light
B、Ultraviolet light
C、Infrared light
D、X-ray
5、The production material of optical fiber is ( )
A、Copper
B、Iron
C、Compound
D、Quartz
6、The disadvantage of optical fiber communication is high transmission loss.
7、Optical fiber can be connected directly without special tools.
8、The function of photodiodes is to convert optical signals into electrical signals.
9、The first laser was a ruby laser.
10、The laser commonly used in communication is semiconductor laser.
Coursework 1
1、Please refer to the data to list the optical communication technologies commonly used at present, and compare their characteristics.
Task 2 Designing an Ideal Optical Transmission Model
2.1 Structure and Classification of Optical Fiber随堂测验
1、Which of the following is a dispersion-shifted single-mode fiber?
A、G.652
B、G.653
C、G.654
D、G.655
2、The structural form of an electromagnetic field that can exist independently is called ( )
A、Field
B、Mode
C、Model
D、Structure
3、According to the laying mode, optical cable can be divided into the following categories
A、Directly buried optical cable
B、Pipeline optical cable
C、Aerial optical cable
D、Underwater optical cable
4、According to the cable core structure, optical cable can be divided into the following categories
A、Layer stranded type
B、Skeleton type
C、Central bundle type
D、Leather thread type
5、According to the refractive index, there are mainly ______ and _______types of optical fibers.
6、According to the transmission mode, there are mainly ______ and _______types of optical fibers.
2.2 Principle of Optical Transmitter随堂测验
1、LED is usually coupled with multimode fiber and is used in small-capacity, short-distance optical communication systems at ( ) wavelengths.
A、1.31μm
B、0.85μm
C、1.55μm
D、1.49μm
2、The physical basis of active devices (light sources and detectors) is the effect of the interaction between light and matter. It can be summed up as the interaction between light and atom, and ( )kinds of physical processes will take place.
A、stimulated absorption
B、spontaneous emission
C、stimulated radiation
D、nuclear radiation
3、The light source is the key device of the optical transmitter, and its function is to convert the electrical signal into the optical signal.
4、The laser is a new type of light source because of its concentrated emission direction, high brightness, superior coherence and good monochromaticity.
5、The light source devices are generally LED and LD.
6、Stimulated radiation is the key to the generation of laser. The reversal distribution state of particle number is the first condition for matter to produce light to enlarge and emit light.
2.3 Principle of Optical Receiver随堂测验
1、Threshold current of laser should be ( )
A、The larger the better
B、The smaller the better
C、Both OK
D、No impact
2、The following ( ) is part of the optical receiver
A、ATC
B、AGC
C、APC
D、ARC
3、The key device in the optical receiver is the semiconductor optical detector, which and the preamplifier in the receiver are called the front end of the optical receiver. The performance of the front end is the main factor that determines the optical receiver.
4、Intensity modulation-direct detection (IM-DD) of optical receiver mainly includes photoelectric detector, preamplifier, main amplifier, equalizer, clock recovery circuit, adjudicator and automatic gain control (AGC) circuit.
5、The amplifier of the optical receiver includes two parts: the preamplifier and the main amplifier. The requirements for the preamplifier are lower noise, wider bandwidth and higher gain. The main amplifier is generally a multi-stage amplifier.
6、The photodetector is a PN junction with a forward bias voltage.
2.4 Optical Wavelength Division Multiplexer and Optical Amplifier随堂测验
1、Which is not the advantage of EDFA?
A、High coupling efficiency
B、High gain and low noise
C、The gain characteristic is sensitive.
D、High energy conversion efficiency
2、Which kind of amplifier is amplified by the nonlinear effect in optical fiber?
A、EDFA
B、Raman fiber amplifier
C、PDFA
D、Semiconductor amplifier
3、Which are the characteristic parameters of optical wavelength division multiplexer?
A、Insertion loss
B、Wavelength isolation
C、Gain
D、Echo loss
4、Optical amplifiers can extend the transmission distance better than photoelectric repeaters.
5、DWDM uses C and L band.
Coursework 2
1、Please draw the basic structure composition of the optical transmitter. Please draw the basic structure composition of the optical receiver.
Task 3 Cognition of SDH transmission network
Task 3 assignment
1、Briefly describe the advantages and disadvantages of SDH.
Task 4 SDH transmission equipment networking
Task 4 assignment
1、This paper briefly describes the function of NCP board of ZXMP S320
Task 5 SDH Network Management Configuration
Task 5 Unit Test
1、( ) interface is used to communicate between NCP and MCU of all boards of this network element.
A、ECC
B、F
C、S
D、Qx
2、In the two-fiber two-way MSP of SDH, one optical fiber is used in each transmission direction, and the（ ）capacity is allocated to the service channel on each optical fiber.
A、A half
B、One-third
C、One-fourth
D、One-fifth
3、In ZXONM E300 network management software, （ ）runs on NCP board.
A、Manager
B、GUI
C、Database
D、Agent
4、The ZXMP S320 device provides a synchronization scheme based on SSM information. The main function of this scheme is（ ）.
A、Select the effective timing source with the highest synchronization quality
B、Prevent the clock from forming a loop
C、Guarantee the timing synchronization performance of the network
D、All of the above are correct.
5、The maximum number of network elements in the two-fiber bi-directional multiplexing segment protection ring is （ ）.
A、8
B、16
C、32
D、64
6、STM-1 can hold （ ） 34M signals.
A、1
B、2
C、3
D、4
7、STM-1 can hold （ ） 2M signals.
A、61
B、62
C、63
D、64
8、STM-1 can hold （ ） 140M signals.
A、1
B、2
C、3
D、4
9、Communication between network elements uses（ ）interface for communication.
A、ECC
B、F
C、S
D、Qx
10、The interface between the network elements and the network management system is（ ）.
A、ECC
B、F
C、S
D、Qx
11、The type of network elements used in SDH ring network is（ ）.
A、REG
B、ADM
C、DXC
D、TM
12、Among the following options,( ) is not the source of the SDH clock
A、External clock source
B、Internal clock source
C、The clock extracted from optical links
D、The clock extracted from network management system
13、Among the following options,( ) is not the call form for a OW phone.
A、Broadcast
B、Point-to-point call
C、Group call
D、Barge in
14、The power board can be installed in the ( ) slot.
A、14、15
B、1、2
C、3、4
D、5、6
15、If a STM-4 interface is required, a ( ) board should be installed.
A、OIB1S
B、ET3E
C、O4CSD
D、NCP
16、The cross board can be installed in the ( ) slot.
A、1、2
B、6、7
C、8、9
D、14、15
17、NCP board can be installed in the ( ) slot.
A、4
B、3
C、2
D、1
18、OW board can be installed in the ( ) slot.
A、15
B、14
C、13
D、12
19、SCB board can be installed in the ( ) slot.
A、14、15
B、2、3
C、4、5
D、6、7
20、If a STM-1 interface is needed, ( ) board should be installed.
A、OIB1S and OIB1D
B、ET3E
C、O4CSD
D、NCP
21、( ) board can provide 2M interface.
A、SCB
B、ET3E
C、ET1
D、CSBE
22、( ) board can provide 34M interface.
A、SCB
B、ET3E
C、ET1
D、CSBE
23、In S1 bytes, the number indicating that the clock is not available is ( ).
A、0010
B、1101
C、1110
D、1111
24、The purpose of setting up OW control points in a ring topology is ( ).
A、Prevent broadcast storms
B、Prevent OW service from forming a ring
C、Prevent OW phone calls from being blocked
D、Prevent the clock from forming a loop
25、With regard to the principle of selecting OW control points, what is incorrect is ( ).
A、It can be configured in a chain network.
B、It can be only configured in a ring network.
C、Select the node with the least optical direction.
D、Prevent broadcast storms.
26、If there are multiple paths to extract the clock, you should choose ( ).
A、The longest path
B、The shortest path
C、Give priority to the internal clock
D、Give priority to the external clock
27、In China, ( ) is used in digital synchronization network.
A、Two-level master-slave synchronization mode.
B、All clock levels are equal.
C、Three-level master-slave synchronization mode.
D、Four-level master-slave synchronization mode.
28、The impact of SDH on synchronous networks does not include ( ).
A、Pointer adjustment will cause a large phase jump at the boundary of the SDH/PDH network.
B、Allow mixed transmission of different specifications of net load, which is disadvantageous to network synchronization planning.
C、The automatic configuration functions of self-healing ring, routing backup and DXC not only provide flexibility and high survivability, but also bring complexity to the selection of network synchronization timing.
D、The accuracy of synchronization network is improved.
29、In S320 equipment, if two STM-4 optical interfaces are needed, ( ) veneer should be installed.
A、ET3E
B、ET1
C、OIB1D
D、O4CSD
30、SDH network management products can be divided into four layers, in the following options，( ) does not belong to these four layers.
A、Board management layer.
B、Network elements layer
C、Network elements management layer
D、Network management layer
Task 5 Unit Exercises
1、Please download and check "task 5 exercises.pdf". According to this pdf document, complete SDH configuration operations and upload screenshots.
Task 6 Configuration For SDH Protection
Task 6 Unit Exercises
1、Please download and check "task 6 exercises.pdf". According to this pdf document, complete MSP configuration operations and upload screenshots.
Task 7 DWDM Networking Foundation
Test7
1、The working window commonly used in WDM technology is
A、850nm
B、1310nm
C、1550nm
D、1800nm
2、The wavelength interval of 40-wave DWDM system is
A、0.4nm
B、0.8nm
C、20nm
D、30nm
3、G.694.1 is the standard for
A、SDH
B、CWDM
C、DWDM
D、MSTP
4、The network element that realizes the functions of optical transmission, multiplexing and demultiplexing is
A、OTM
B、OLA
C、OADM
D、OXC
5、The optical transmission unit is configured in the network element
A、OTM
B、OLA
C、OADM
D、OXC
6、Which factor does not affect the transmission distance of DWDM?
A、attenuation
B、dispersion
C、nonlinear effect
D、electromagnetic interference
7、In the reference configuration of the DWDM system specified in the G.692 protocol, MPI-S refers to
A、channel sender point
B、main path interface sender
C、main path interface receiver
D、channel receiver point
8、The electric relay function is realized by OTM which can realize the rebirth of optical signal.
9、In order to reduce the attenuation, the optical signal through OSC channel needs to be amplified.
10、Similar to EDFA, Raman amplifiers can only work in C and L bands.
Courework7
1、Please explain how the three multiplexing technologies of TDM, WDM and SDM are applied in the optical fiber communication system.
Task 8 OTN Networking Foundation
Test8
1、The electrical layer of OTN does not include
A、OPU
B、ODU
C、OTU
D、OCH
2、The FEC overhead is generated at the
A、OPU
B、ODU
C、OTU
D、OCH
3、The optical link between network elements of OTN is called
A、OTS
B、OMS
C、OCH
D、OXC
4、The first field of the OTN frame is
A、FAS
B、SM
C、PM
D、TDM
5、The OTN frame size is
A、9x270xN
B、4x4080
C、1024
D、53
6、The framing of OTN data is completed in
A、OTU
B、OM
C、OLA
D、OD
7、When the client signal of the OTN system is adapted, it firstly enter
A、OPU
B、ODU
C、OTU
D、OCH
8、Compared with DWDM network, OTN improves the speed of optical transmission.
9、The frame size of OTN is variable
10、Compared with DWDM, OTN system focuses on enhancing the function of OAM.
Coursework8
1、Please explain the role of each overhead in the OTN frame
Task 9 OTN Network Management Configuration
9.2 OTN Optical Power Debugging随堂测验
1、The OTN optical interface specification protocol defined by ITU-T is ( )
A、G.957
B、G.691
C、G.692
D、G.709
2、The meaning of the number in 'SEOBA 2520' is: ________
A、The gain is 20dB and the maximum output optical power is 25dBm.
B、The gain is 25dB and the maximum output optical power is 20dBm.
C、The gain is 20dB and the stable output optical power is 25dBm.
D、The gain is 25dB and the stable output optical power is 20dBm.
3、When measuring the optical power, we should first ensure that the input optical power difference of each channel of the OMU is within _____.
A、1dB
B、2dB
C、3dB
D、5dB
4、The main characteristic of OBA is that the noise figure is low and there is no great requirement for output power.
5、According to the type of position, the amplifier board can be divided into_______, _________ and ________.
9.4 Realization of OTN Protection Function随堂测验
1、About SOP board, which of the following is wrong?
A、Sop board uses relative non-light decision mode by default.
B、Default switching trigger condition : |Pp-Pw| > 5dB
C、Default switching recovery condition : |Pp-Pw| > 2dB
D、SOP can be used in OCH, OMS and OTS layer
2、Which boards have APR/APSD function?
A、OMU
B、ODU
C、SEOBA
D、SEOPA
Coursework 9
1、A 40-wave OTN system is shown in the figure, and now 5 waves are activated. Where does the system need to add the optical attenuators, and how about their values? (log2=0.3, log5=0.7)
Task 10 Understanding the development of optical transmission system
Coursework 10
1、Please analyze the most key technologies involved in the development of optical communication technology and discuss your views according to your study and reference materials
Task 11 New Cognitive Transmission Technology
Test 11
1、What is the wavelength of ultra long wavelength infrared optical communication？
A、2~5 in microns
B、5~10 in microns
C、10~15 in microns
D、15~20 in microns
2、What technologies are involved in the new optical communication technologies？
A、Optical soliton communication technology
B、Ultra long wavelength optical fiber communication technology
C、Coherent optical fiber communication technology
D、Optical wavelength division multiplexing technology
3、Which two technologies are used in coherent optical communication technology？
A、Envelope detection technology
B、Heterodyne detection technology
C、Coherent modulation technology
D、OFDM technology
4、Compared with linear optical fiber communication, optical soliton communication has a series of significant advantages, including:
A、The transmission capacity is 1~2 orders of magnitude larger than that of the best linear communication system.
B、Optical arc sub communication system can carry out all-optical relay.
C、Optical soliton communication is superior to intensity modulation / direct detection and coherent optical communication in high fidelity and long-distance transmission.
D、Wide transmission band and large communication capacity.
5、In the optical soliton amplification technology, all-optical soliton amplifier can directly amplify the optical signal, avoiding the optical / electrical and electrical / optical conversion modes in the traditional optical communication system.
6、The loss of optical soliton is inevitable in the propagation of optical fiber.
7、The so-called coherent modulation is to use the signal to be transmitted to change the frequency, phase and amplitude of the optical carrier, which requires that the optical signal has a certain frequency and phase, that is, it should be coherent light.
8、All information carried by amplitude, frequency, phase and polarization state of light can be detected in ordinary optical communication.
学习通Optical Fiber Communications Engineering_1
光纤通信工程是一门非常重要的学科，随着现代通信技术的不断发展，光纤通信已经成为了当今世界上最为先进和最为稳定的通信方式。这一学科包含了很多的重要知识和技术，对于想要从事相关工作的人来说，学习通Optical Fiber Communications Engineering_1是一门非常理想的课程。
课程简介
学习通Optical Fiber Communications Engineering_1课程包含了大量的理论知识和实际应用技术，主要包括光纤通信系统的基本原理、光纤通信系统的组成和工作原理、光纤通信系统的设计和维护等方面的内容。
课程大纲
下面是学习通Optical Fiber Communications Engineering_1课程的详细大纲：
- 第一章：光纤通信系统的基本原理
- 第二章：光纤通信系统的组成和工作原理
- 第三章：光纤通信系统的设计和维护
- 第四章：光纤通信系统的应用
学习方法
学习光纤通信工程需要具备一定的基础知识和技术，在学习这门课程之前，建议先学习相关的数学、物理和电子学科。在学习过程中，可以通过以下方法提高学习效果：
- 认真听讲课程内容，并逐步理解光纤通信的基本原理和工作方式。
- 多进行实践操作，例如通过搭建实验平台来了解光纤通信系统的组成和工作原理。
- 多阅读相关的书籍和资料，了解光纤通信的最新技术和应用。
- 与同行业的专家和工程师进行交流和探讨，共同学习和进步。
学习效果
通过学习通Optical Fiber Communications Engineering_1课程，可以掌握光纤通信系统的基本原理和工作方式，了解光纤通信的最新技术和应用，提高自身在相关领域的知识和技术水平。同时，通过认真学习和实践操作，还可以获得相关领域的工作经验和实践经验，为自己的职业发展奠定良好的基础。
总结
总之，学习通Optical Fiber Communications Engineering_1是一门非常重要的课程，对于想要从事光纤通信工程相关工作的人来说非常有价值。通过认真学习和实践操作，可以掌握光纤通信的基本原理和工作方式，了解光纤通信的最新技术和应用，提高自身在相关领域的知识和技术水平，为自己的职业发展奠定良好的基础。
体液免疫的抗感染作用不包括下列哪项
A.什么命令允许你查看RAM中的配置
B.如果一个人容易手脚发凉，那么一定属于寒性体质。
C.笔试能较快地考察应聘者的专业知识等。
D.一般有哪几种语势（ ）。
下列关于财务关系的说法，正确的有（）。
A.红葡萄酒的烟熏味道比干白葡萄酒会强烈 ( )
B.有关PC和DPTR说法错误的是（
C.以下哪项不是人类文化体系划分的标准
D.玩弄故事时间是一种比倒叙和插叙复杂得多的非线性叙事。
在宜昌中堡岛出土的陶器大多为（）
A.同时使用链接的4种伪类是，定义的顺序是_____。
B.建设工程实行招标时，一般应具备下列哪些条件（ ）
C.植物从环境中吸收离子时具选择性，但对同一种盐的阴离子和阳离子的吸收上无差异。
D.“复杂人”、“自我实现人”，充分体现了“人是目而不是手段”。（）
如果A国经济在2000年（基期）的GDP
A.信息时代对老师能力有哪些新要求
B.职业道德与人的事业的关系是（ ）
C.赫哲族现有的民族乐器，只有__________和跳萨满时所用的椭圆形的鼓
D.]一般燃烧的现象不包括（
激励因素与满意因素相联系
A.拜占庭帝国的钱币索里得是一种（ ），常在丝绸之路上有所发现
B.会计目标的两种主要学术观点是（ ）
C.战略性贸易政策理论中的市场结构不包括()。
D.卡臂尖位于基牙倒凹区，可以
唐朝诗人白居易的《慈乌夜啼》借鸟感慨，乌鸦在他笔下是（ ）
A.开展传染病预防知识和防治措施的
B.设置底部加强部位的目的是实现强墙弱梁
C.对李清照《如梦令》一词分析错误的一项是（ ）。
D.实施存货监盘程序时，注册会计师应特别关注的情况有
有关肠造口袋照护错误的是
A.2、滑动摩擦力与物体所受重力成正比。
B.农业园区规划调查基本内容包括自然资源、社会经济、区外经济和（ ）
C.中期财务报告包括：（ ）
D.骨折的移位方式包括：（ ）
暴雨是指雨势倾盆，关于暴雨的标准描述不正确的是（ ）。
A.若安·米罗被视为超现实主义的代表性画家。曾对他产生过影响的艺术家包括
B.科层制会导致每一个人逐渐被安排到与其能力不符合的位置上。
C.良好的身体姿态使你看上去既健康，又充满活力，从而给人一种风度美的欣赏。
D.MODS病因说法错误的是：
成功的创业包括以下哪几种资源 ( )
A.下列属于社会救济的措施是
B.内存中每个字节都有一个编号，叫________。
C.a sense of awe
D.爻辞是解说每个爻在本卦中的象征意义，并推断吉凶的文字。
不协调性宫缩乏力的处理原则是
A.玻璃纤维纸属于深层过滤技术。
B.过一般位置直线外一点可以直接作该直线的垂线。
C.辐射形网络的潮流分布和环网的潮流分布都可调控。（）
D.关于地基土的液化，下列哪句话是错误的
企业环境指示系统设计中包含哪些必备的设计要素（ ）
A.乌龙茶属半发酵茶，是介于不发酵的绿茶和全发酵的红茶之间的一类茶叶，其叶片（ ）
B.表明他们仍然幻想可能走第三条道路
C.下列运算符中，在C++语言中不能重载的是（ ）
D.以下哪本经书不是跋陀翻译出来的
物流系统的输入的具体内容包括（）
A.夸美纽斯提出了班级授课制制度。
B.及时服用牛奶、蛋清等保护胃粘膜是强酸和强碱误食后首先需要做的。()
C.导入技能的类型除了直接导入、复习导入、情境导入外，还包括（）
D.下列不属于巡回法庭管辖范围的是
用人单位不能单方解除劳动合同的是
A.文景之治时期实行的社会统治思想是：
B.下图所示属于第四方物流的哪种形式（）
C.在现代文学家族题材的作品中，“家”的没落、坍塌与解构成为主导性的价值取向。
D.坚持协调发展,推动区域协调发展,塑造( )的区域协调发展新格局
企业用工除选择正常的劳动者外，可能涉及的特殊对象包括（）
A.属于东路二人台特有的剧目是：
B.（ ）对《伤寒杂病论》进行了重新编纂。
C.“吴门画派”的画风有什么特点
D.沐浴应该在脑瘫儿童进食几个小时后进行
