In single mode fibers, the most beneficial index profile is

Related MCQs

• Single mode fibers allow single mode propagation; the cladding diameter must be at least
• Graded index fibers produced by liquid-phase melting technique are less dispersive than step-index fibers. State whether the given statement is true or false.
• Multimode graded index fibers have overall buffer jackets same as multimode step index fibers but have core diameters
• A step-index fiber has core refractive index 1.46 and radius 4.5μm. Find the cutoff wavelength to exhibit single mode operation. Use relative index difference as 0.25%.
• A step-index fiber has core refractive index 1.46 and radius 4.5μm. Find the cutoff wavelength to exhibit single mode operation. Use relative index difference as 0.25%.
• A graded index fiber has a parabolic refractive index profile (α=2) and core diameter of 42μm. Estimate an insertion loss due to a 2 μm lateral misalignment when there is index matching and assuming there is uniform illumination of all guided modes only.
• Lens-coupled expanded beam connectors exhibit average losses of _________ in case of single mode and graded index fibers.
• Average insertion losses as low as _________ have been obtained with multimode graded index and single-mode fibers using ceramic capillaries.
• Intermodal dispersion in multimode fibers is minimized with the use of step-index fibers. State whether the given statement is true or false.
• An optical fiber has core-index of 1.480 and a cladding index of 1.478. What should be the core size for single mode operation at 1310nm?