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WorksheetsLASERS AND OPTICAL FIBRES
Total questions: 12
Worksheet time: 6mins
Which is not a characteristic of LASER?
Monochromatic
Directionality
Multiple Wavelength
High Intensity
Radiation interacts with matter in how many ways
2
3
0
1
Helium-Neon LASER is a:
Gas LASER
Liquid LASER
Solid LASER
Plasma Laser
The population inversion in semiconductor LASER is acheived by:
Polishing opposite surfaces
Applying electric current
Adequate doping
Heating to high temperature
Holograms can be prepared using:
Solar Radiation
LASER
Xenon Lamp
Sodium Vapour Lamp
The ratio of the refractive index difference of the
core and cladding to the refractive index of core of an optical fiber
Fractional Index Change
V-Number
Numerical Aperture
Acceptance Angle
Which of these types of optical fibers is almost impossible to manufacture?
Single mode, step index OFC
MUlti mode, Step index OFC
Single mode, graded index OFC
Multi mode, graded index OFC
Optical fibers are also called
(a)
The condition for propagation of light in optical fibers is
Sinθi<NA
Sinθi>NA
Sinθi=NA
Sinθi=0.5
The schematic represents
Graded index optical fibre
Step index optical fibre
Single mode optical fibre
Dual optical fibre
The type of attenuation shown is
Absorption Loss
Scattering Loss
Radiation Loss
Adsorption Loss
Inter-modal dispersion can be minimized by
Single Mode OFC
Graded Index multimode OFC
Step Index multimode OFC
