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Fiber Optical interview questions and answers-Optical Questionnaire

This page describes fiber optical questionnaire written by specialists in fiber optic domain. This top 10 fiber optical interview questions and answers will help interviewee pass the job interview for fiber optic job position with ease. These questions are very useful as college viva questions also.

Question -1: Explain two main components which form fiber optic communication system.
Answer -1: LED is used at transmit end and photo diode is used at receive end of fiber optic system. LED converts electrical signal to light form and photo diode does the reverse.
Refer Answer-1➤.

Question -2: What is FTTH? Explain different types of optical networks.
Answer -2: FTTH stands for fibre to the home. There are two main types viz. AON (Active Optical Network) and PON (Passive Optical Network).
Refer Answer-2➤.

Question -3: Explain difference between SDH and PDH?
Answer -3: Refer PDH vs SDH➤.

Question -4: Explain difference between SDH and SONET.
Answer -4: Refer SONET vs SDH➤.

Question -5: What is WDM ? Explain different types of WDM.
Answer -5: WDM stands for Wavelength Division Multiplexing. There are diference types of WDM such as narrowband, wideband, coarse and dense WDM.
Refer What is WDM➤ and types of WDM➤.

Question -6: Explain Basics of Optical Amplifier. Explain EDFA.
Answer -6: Optical Amplifier is used to amplify the optical signal. EDFA stands for Erbium Doped Fiber Amplifier.
Refer Answer-6➤.


EDFA-Erbium Doped Fiber Amplifier

Question -7: Explain the function of optical isolator and optical circulator in fiber optic communication system.
Answer -7: Optical isolator passes optical signal in one direction and blocks the signal coming from the other direction. Optical circulator couples the signal from one port to the next port, but only in one durection i.e. either clockwise or anti-clockwise.
Refer Optical Isolator➤ and Optical Circulator➤

Question -8: Explain SDH network and describe SDH modulation.
Answer -8:
Refer SDH Network basics➤ and SDH Modulation basics➤

Question -9: Explain SDH frame structure.
Answer -9: Refer SDH Frame Structure➤.

Question -10: Explain PDH frame structure.
Answer -10: Refer PDH Frame Structure➤.

This set of fiber optical interview questions and answers are useful for freshers and experienced level of job positions.



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