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

View solution

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

View solution

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.

View solution

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.

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. What does micro-bending losses depend on _____________

View solution

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

View solution

Q. The diffusion of hydrogen into optical fiber affects the ______________

View solution

Q. __________ can induce a considerable amount of attenuation in optical fibers.

View solution

Q. The radiation-induced attenuation can be reduced through photo-bleaching.

View solution

Q. The losses due to hydrogen absorption and reaction with fiber deposits can be temporary.

View solution

Q. The losses caused due to hydrogen absorption mechanisms are in the range of ___________

View solution

Q. The cable must be designed such that the strain on the fiber in the cable does not exceed __________

View solution

Q. How many categories exists in case of cable design?

View solution

Q. How many types of buffer jackets are used in fiber buffering?

View solution