大学MOOC Optical Fiber Communications Engineering(南京信息职业技术学院)1461343169 最新慕课完整章节测试答案
Task 1 Cognition of Optical Fiber Communication System
文章目录
- Task 1 Cognition of Optical Fiber Communication System
- Task 2 Designing an Ideal Optical Transmission Model
- Task 3 Cognition of SDH transmission network
- Task 4 SDH transmission equipment networking
- Task 7 DWDM Networking Foundation
- Task 8 OTN Networking Foundation
- Task 9 OTN Network Management Configuration
Practise
1、单选题：
"Optical fiber communication" refers to ( )
选项：
A: A communication mode in which radio waves are used as carriers and optical fibers are used as transmission media.
B: A communication mode in which optical waves are used as carriers and optical fibers are used as transmission media.
C: A communication mode in which optical waves are used as carriers and cables are used as transmission media.
D: A communication mode in which laser is used as carriers and optical fibers are used as transmission media.
答案: 【 A communication mode in which optical waves are used as carriers and optical fibers are used as transmission media.】
2、判断题：
The disadvantage of optical fiber communication is high transmission loss.
选项：
A: 正确
B: 错误
答案: 【 错误】
3、判断题：
The function of photodiodes is to convert optical signals into electrical signals.
选项：
A: 正确
B: 错误
答案: 【 正确】
4、判断题：
The first laser was a ruby laser.
选项：
A: 正确
B: 错误
答案: 【 错误】
5、判断题：
The laser commonly used in communication is semiconductor laser.
选项：
A: 正确
B: 错误
答案: 【 正确】
Test 1
1、单选题：
The production material of optical fiber is ( )
选项：
A: Copper
B: Iron
C: Compound
D: Quartz
答案: 【 Quartz】
2、单选题：
The three wavelengths used in optical fiber communication are ( )
选项：
A: λ=0.85um，λ=1.20um，λ=1.80um
B: λ=0.80um，λ=1.51um，λ=1.80um
C: λ=0.85um，λ=1.31um，λ=1.55um
D: λ=0.85um，λ=1.20um，λ=1.80um
答案: 【 λ=0.85um，λ=1.31um，λ=1.55um】
3、单选题：
The function of the photodetector is ( )
选项：
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
答案: 【 Convert an optical signal into an electrical signal】
4、单选题：
The spectrum of optical fiber communication belongs to ( )
选项：
A: Visible light
B: Ultraviolet light
C: Infrared light
D: X-ray
答案: 【 Infrared light】
5、判断题：
Optical fiber can be connected directly without special tools.
选项：
A: 正确
B: 错误
答案: 【 错误】
Task 2 Designing an Ideal Optical Transmission Model
Practise
1、单选题：
Which kind of amplifier is amplified by the nonlinear effect in optical fiber?
选项：
A: EDFA
B: Raman fiber amplifier
C: PDFA
D: Semiconductor amplifier
答案: 【 Raman fiber amplifier】
2、多选题：
Which are the characteristic parameters of optical wavelength division multiplexer?
选项：
A: Insertion loss
B: Wavelength isolation
C: Gain
D: Echo loss
答案: 【 Insertion loss;
Wavelength isolation;
Echo loss】
3、判断题：
Optical amplifiers can extend the transmission distance better than photoelectric repeaters.
选项：
A: 正确
B: 错误
答案: 【 正确】
4、判断题：
DWDM uses C and L band.
选项：
A: 正确
B: 错误
答案: 【 正确】
Test 2
1、单选题：
Which of the following is a dispersion-shifted single-mode fiber?
选项：
A: G.652
B: G.6