31. A multimode fiber has refractive indices n1 = 1.15, n2 = 1.11 and an operating wavelength of 0.7μm. Find the radius of curvature?
32. For suitable power confinement of fundamental mode, the normalized frequency v should be maintained in the range 1.5 to 2.4μm 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?
33. Multimode step index fiber has
34. In graded index multimode optical fiber the refractive index of the core is
35. Assuming that packet transmission and retransmission can both be described as a Poisson process, calculate the probability that a data packet transmission in an S-ALOHA system will experience a collision with another user. Assume the total traffic rate λt = 10 packet/sec and the packet duration τ = 10 msec.
36. Light may be propagated along a fiber-optic cable in which of the following modes?
37. Which one of the following is the correct statement?
The graded index optical fiber cables can be considered to have
The graded index optical fiber cables can be considered to have
38. A glass fiber has refractive indices n1 of 1.5 and n2 of 1. Assuming c = 3 × 108 m/s, the multipath time dispersion will be
39. The normalized frequency of a step index fiber is 28 at 1300 nm wavelength. What is the total number (approx) of guided modes that can be supported by the fiber
40. In single - mode fibers, how does the fraction of energy travelling through bound mode appears in the cladding?
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