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?

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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.

View solution

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

View solution

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.

View solution

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

View solution

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

View solution

Q. The nonlinear effects in optical fibers are large.

View solution

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

View solution

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

View solution

Q. Linear scattering effects are _______ in nature.

View solution

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

View solution

Q. _________ semiconductor laser sources generally have broader bandwidths.

View solution

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

View solution

Q. Self-phase modulation causes modifications to the pulse spectrum.

View solution