What is the numerical aperture of the fiber if the angle of acceptance is 16 degree?
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ECE · all questionsOptical Communication
Optical Communication
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Rayleigh scattering can be reduced by operating at smallest possible wavelengths.
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Intermodal dispersion occurring in a large amount in multimode step index fiber results in . . . . . . . .
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A graded-index fiber has a core with parabolic refractive index profile of diameter of 30μm, NA=0.2, λ=1μm. Estimate the normalised frequency.
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The dispersion due to material, waveguide and profile are -2.8nm-1km-1, 20.1nm-1km-1 and 23.2nm-1km-1 respectively. Find the total first order dispersion?
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When two components are equally excited at the fiber input, then for polarization maintaining fibers δΓg should be around . . . . . . . .
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3dB optical bandwidth is always . . . . . . . the 3dB electrical bandwidth.
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What is needed to predict the performance characteristics of single mode fibers?
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The beat length in a single mode optical fiber is 8 cm when light from a laser with a peak wavelength 0.6μm is launched into it. Estimate the modal birefringence.
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The difference between the modes' refractive indices is called as . . . . . . . .
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The high index contrast enables the PCF core to be reduced from around 8 μmin conventional fiber to . . . . . . . . .
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Absorption losses due to atomic defects mainly include . . . . . . . .
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The modal noise occurs when uncorrected source frequency is?
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An optical fiber has a core radius 2μm and a numerical aperture of 0.1. Will this fiber operate at single mode at 600 nm?
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Skew rays follow a . . . . . . . .
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What is pulse dispersion per unit length if for a graded index fiber, 0.1μs pulse broadening is seen over a distance of 13 km?
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The optical source used for detection of optical signal is . . . . . . . .
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The optical source used in a fiber is an injection laser with a relative spectral width of 0.0011 at a wavelength of 0.70μm. Estimate the RMS spectral width.
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What is β in the given equation?
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Disturbance along the fiber such as vibrations, discontinuities, connectors, splices, source/detectors coupling result in . . . . . . . .
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