Q. Multimode graded index fibers use incoherent source only.

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Q. In single mode fibers, which is the most beneficial index profile?

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Q. The fibers mostly not used nowadays for optical fiber communication system are ___________

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Q. Single mode fibers allow single mode propagation; the cladding diameter must be at least ___________

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Q. A fiber which is referred as non-dispersive shifted fiber is?

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Q. Standard single mode fibers (SSMF) are utilized mainly for operation in ___________

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Q. Fiber mostly suited in single-wavelength transmission in O-band is?

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Q. When optical fibers are to be installed in a working environment, the most important parameter to be considered is?

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Q. It is not important to cover these optical fibers required for transmission.

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Q. Optical fibers for communication use are mostly fabricated from ___________

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Q. An Si-O bond with a Young’s modulus of 9*10¹⁰ nm⁻¹ have an elliptical crack of depth 7 nm. The surface energy is 2.29 J. Estimate fracture stress for silica fiber.

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Q. Calculate percentage strain at break for a Si-O bond with a fracture strength of 3.52*10¹⁰ nm⁻¹ and Young’s modulus of 9 *10⁹ nm⁻¹.

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Q. Stress corrosion must be considered while designing and testing optical fiber cables.

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Q. Which statistics are used for calculations of strengths of optical fibers?

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Q. What does n denotes in the equation given below, if vc is the crack velocity; A is the constant for the fiber material and KI is the strength intensity factor?

vc = AKIⁿ

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Q. ____________ results from small lateral forces exerted on the fiber during the cabling process.

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Q. Microscopic meandering of the fiber core axis that is micro-bending is caused due to ___________

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Q. How many forms of modal power distribution are considered?

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Q. What does micro-bending losses depend on _____________

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Q. The fiber should be________________ to avoid deterioration of the optical transmission characteristics resulting from mode-coupling-induced micro-bending.

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