Objective questions on Opto Electronics

M.Sc Electronics Semester II Exam Oct/Nov 2019 Shivaji University Kolhapur

The fiber _____ is a permanent or semi permanent joint between two fiber
(a) Connector
(b) coupler
(c) Splice
(d) All of these

An optical device used for detection of optical signal is ____
(a) IR sensor
(b) Zener Diode
(c) Photodiode
(d) Transistor

______by atomic dfect in the glass composition of optical fiber.
(a) Absorption
(b) Extrinsic absorption
(c) Instrinsic absorption
(d) None of these

In lambertian output pattern of LED< the source is ______ bright from all direction.
(a) Less
(b) equally
(c) More
(d) Unpredictably

The ____ is known as second order effect.
(a) Pocket effect
(b) magnetic effect
(c) acoustic effect
(d) Kerr effect

Which of the following does not supports the soot formation process?
(a) OVPO
(b) MCVD
(c) PCVD
(d) All of these

The _____ consist of two adjoining semiconductor material with different band gap energies.
(a) n-region
(b) heterojunction
(c) p-region
(d) diffusion region

The optical fiber _____ device that distribute light from a main fiber into one or more branch fiber.
(a) Splice
(b) connector
(c) Isolator
(d) coupler

The ____ is a created by hetero-junction at collector-base junction
(a) potential barrier
(b) depletion region
(c) inductance
(d) capacitance

In optical fiber, the attenuation coefficient is measured in units of _____
(a) dB/km
(b) dB/um
(c) dB/mm
(d) dB/nm

The light source used in fiber optics communication are ______
(a) LED
(b) LASER
(c) Transistor
(d) Both a and b

The working principle of optical fiber is _____ used.
(a) Snell law
(b) Total internal reflection
(c) Diffraction
(d) Interference

The material in which population inversion takes place is called as _____
(a) active medium
(b) passive medium
(c) gaseous medium
(d) vapour medium