1) If a fiber operates at 1400nm with the diameter of about 10 μm, n1 = 1.30, Δ = 0.80% , V = 3.5, then how many modes will it have?
a. 6.125
b. 9.655
c. 12.95
d. 16.55
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Answer
Explanation
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ANSWER: 6.125
Explanation:
No explanation is available for this question!
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2) Which among the following represents the lateral shift of a light beam on reflection at a dielectric interface?
a. Doppler's Shift
b. Goos-Haenchen's Shift
c. Frequency Shift
d. Phase Shift
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Answer
Explanation
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ANSWER: Goos-Haenchen's Shift
Explanation:
No explanation is available for this question!
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3) The order of mode is equal to the number of field____ across the guide.
a. Zeros
b. Poles
c. Ones
d. All of the above
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Answer
Explanation
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ANSWER: Zeros
Explanation:
No explanation is available for this question!
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4) With respect to single mode and graded index fibers, which parameter specifies the propagation of polarization modes with different phase velocities & the difference between their effective refractive indices?
a. Mode field diameter
b. Birefringence
c. Fiber beat length
d. Spot Size
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Answer
Explanation
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ANSWER: Birefringence
Explanation:
No explanation is available for this question!
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5) Which kind of dispersion phenomenon gives rise to pulse spreading in single mode fibers?
a. Intramodal
b. Intermodal
c. Material
d. Group Velocity
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Answer
Explanation
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ANSWER: Intramodal
Explanation:
No explanation is available for this question!
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6) Which rays exhibit the variation in the light acceptability ability of the fiber?
a. Meridional
b. Skew
c. Leaky
d. All of the above
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Answer
Explanation
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ANSWER: Skew
Explanation:
No explanation is available for this question!
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7) In an optical fiber, the concept of Numerical aperture is applicable in describing the ability of __________
a. Light Collection
b. Light Scattering
c. Light Dispersion
d. Light Polarization
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Answer
Explanation
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ANSWER: Light Collection
Explanation:
No explanation is available for this question!
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8) If a light travels in a certain medium and it gets reflected off an optically denser medium with high refractive index, then it is regarded as _______
a. External Reflection
b. Internal Reflection
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: External Reflection
Explanation:
No explanation is available for this question!
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9) What is the typical value of refractive index for an ethyl alcohol?
a. 1
b. 1.36
c. 2.6
d. 3.4
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Answer
Explanation
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ANSWER: 1.36
Explanation:
No explanation is available for this question!
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10) In single-mode fibers, how does the fraction of energy traveling through bound mode appear in the cladding?
a. As a crescent wave
b. As a gibbous wave
c. As an evanescent wave
d. All of the above
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Answer
Explanation
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ANSWER: As an evanescent wave
Explanation:
No explanation is available for this question!
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