Q. The fibers which relax the spectral requirements for optical sources and allow flexible wavelength division multiplying are known as __________

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Q. For suitable power confinement of fundamental mode, the normalized frequency v should be maintained in the range 1.5 to 2.4 μm and the fractional index difference must be linearly increased as a square function while the core diameter is linearly reduced to keep v constant. This confinement is achieved by?

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Q. Any amount of stress occurring at the core-cladding interface would be reduced by grading the material composition.

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Q. The variant of non-zero-dispersion-shifted fiber is called as __________

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Q. Non-zero-dispersion-shifted fiber was introduced in the year 2000.

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Q. For many applications that involve optical fiber transmission, an intensity modulation optical source is not required.

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Q. The optical source used for detection of optical signal is ____________

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Q. An optical fiber behaves as a birefringence medium due to differences in ___________

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Q. The beat length in a single mode optical fiber is 8 cm when light from a laser with a peak wavelength 0.6 μm is launched into it. Estimate the modal birefringence.

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Q. Beat length of a single mode optical fiber is 0.6 cm. Calculate the difference between propagation constants for the orthogonal modes.

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Q. A polarization maintaining fiber operates at a wavelength 1.2 μm and have a modal birefringence of 1.8*10⁻³. Calculate the period of perturbation.

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Q. When two components are equally excited at the fiber input, then for polarization maintaining fibers δΓg should be around ___________

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Q. Polarization modal noise can _________ the performance of communication system.

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Q. The nonlinear effects in optical fibers are large.

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Q. How many categories of nonlinear effects are seen in optical fibers?

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Q. Which of the following is not related to Kerr effects?

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Q. Linear scattering effects are _______ in nature.

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Q. Which thing is more dominant in making a fiber function as a bidirectional optical amplifier?

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Q. _________ semiconductor laser sources generally have broader bandwidths.

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Q. Nonlinear effects which are defined by the intensity – dependent refractive index of the fiber are called as ________

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