Optical Communication (KEC-058) - AKTU Question Paper 2021-22
B.Tech · Semester 5 · Free PDF Download
This is the official AKTU Optical Communication Previous Year Question Paper for B.Tech Semester 5, academic session 2021-22. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.
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Questions Asked in 2021-22
Optical Communication (KEC-058) — complete question paper
- aDefine acceptance angle and numerical aperture
- bExplain normalized frequency (V) value in a multimode and single mode optical fiber
- cClassify different types of nonlinear scattering in an optical fiber
- dDifferentiate between electrical and optical bandwidth using frequency response curve
- eExplain the importance of double hetereo-junction structures in an optical source
- fPlot the effect of temperature on the avalanche gain of a photodiode
- gDefine receiver sensitivity and quantum limit
- hDefine Intrinsic and extrinsic absorption in an Optical Fiber. i. Formulate the condition of minimum Gain in Fabry-Perot Cavity to sustain Oscillation. j. Define Stimulated emission
- aClassify optical fibers on the basis of number of modes and cor e refractive index profile
- bA multimode step index fiber with core diameter of 70µm, relati ve refractive index difference of 1.7% is operating at a wavelength of 0.85µm. If t he core refractive index is 1.48, Estimate (i) Normalized frequency (ii) Number of Guided Modes
- aDetermine the rms pulse broadening (σs ) due to intermodal dispersion in terms of core refractive index (n 1) , cladding refractive index (n 2 ) a n d t h e l e n g t h o f f i b e r f o r a multimode step index fiber. A 6 k m optical link consists of multimode step index fiber with a core refractive index of 1.5 and a relative refractive i ndex difference of 1 %. Estimate the delay difference between the slowest and fastest modes
- bExplain the bending losses in an optical fiber, also calculate the critical radius of curvature for a multimode fiber with a core refractive index of 1.8, a relative refractive index difference of 4 % and an operating wavelength of 0.82µm
- aExplain Fabry Perot resonating cavity. A ruby laser contains a crystal of length 5cm with a refractive index of 1.67. The peak emission wavelength f rom the device is 0.65 µm. Determine the no of longitudinal modes and their frequency separation
- bExplain S-LED and E-LED str uctures with the help of proper diagram
- aExplain principle, construction and working of p-i-n diode. Dis cuss the factors which limit the speed of response of a photodiode
- bDiscuss the requirements of an ideal photo detector; also expla in the construction and working of avalanche photodiode
- aDiscuss Eye pattern features in an optical communication, also comment on ISI using Eye diagram
- bIllustrate Power Penalty in an optical communication. Also expl ain different types of Power Penalties
Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.
Repeated Questions — KEC-058
Questions that appeared in more than one session, found by comparing 3 years of Optical Communication papers (2021-22, 2022-23, 2023-24)
Illustrate Power Penalty in an optical communication. Also expl ain different types of Power Penalties
Appeared in: 2021-22 · 2023-24
Optical Communication — Other Year Papers
AKTU Optical Communication PYQs from other sessions
More B.Tech Semester 5 (2021-22) Papers
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Syllabus & More PYQs
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