Q. High frequency optical phonon is generated in stimulated Raman scattering.

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Q. Stimulated Raman scattering occur in ___________

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Q. Stimulated Raman scattering may have an optical power threshold of may be three orders of magnitude ___________

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Q. What is dispersion in optical fiber communication?

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Q. What does ISI stand for in optical fiber communication?

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Q. For no overlapping of light pulses down on an optical fiber link, the digital bit rate BT must be ___________

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Q. The maximum bit rate that may be obtained on an optical fiber link is 1/3Γ.

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Q. 3 dB optical bandwidth is always ___________ the 3 dB electrical bandwidth.

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Q. A multimode graded index fiber exhibits a total pulse broadening of 0.15 μs over a distance of 16 km. Estimate the maximum possible bandwidth, assuming no intersymbol interference.

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Q. What is pulse dispersion per unit length if for a graded index fiber, 0.1 μs pulse broadening is seen over a distance of 13 km?

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Q. Chromatic dispersion is also called as intermodal dispersion.

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Q. The optical source used in a fiber is an injection laser with a relative spectral width σλ/λ of 0.0011 at a wavelength of 0.70 μm. Estimate the RMS spectral width.

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Q. In waveguide dispersion, refractive index is independent of ______________

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Q. Intermodal dispersion occurring in a large amount in multimode step index fiber results in ____________

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Q. After Total Internal Reflection the Meridional ray __________

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Q. Consider a single mode fiber having core refractive index n1= 1.5. The fiber length is 12 m. Find the time taken by the axial ray to travel along the fiber.

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Q. A 4 km optical link consists of multimode step index fiber with core refractive index of 1.3 and a relative refractive index difference of 1%. Find the delay difference between the slowest and fastest modes at the fiber output.

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Q. A multimode step-index fiber has a core refractive index of 1.5 and relative refractive index difference of 1%. The length of the optical link is 6 km. Estimate the RMS pulse broadening due to intermodal dispersion on the link.

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Q. The differential attenuation of modes reduces intermodal pulse broadening on a multimode optical link.

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Q. The index profile of a core of multimode graded index fiber is given by?

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