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Optical Fiber Communications(BECE318L)
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4. A fiber has a core refractive index of 1.46 and a cladding refractive index of 1.44. Calculate the V-number at an operating wavelength of 1300 nm for a core radius of 4.5 µm.
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9. If the Kerr nonlinearity of a fiber is 1.2 W⁻¹ km⁻¹ and the input power is 5 mW, what is the nonlinear phase shift over a 10 km fiber?
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15. If the power of an optical signal decreases from 10 mW to 1 mW over a fiber span, what is the loss in dB?
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13. What is the cutoff wavelength for a single-mode fiber with a core radius of 4 μm and refractive indices of core and cladding as 1.48 and 1.47, respectively?
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12. A fiber exhibits Stimulated Brillouin Scattering (SBS) threshold at an input power of 12 mW for a 20 km span. If the fiber length is doubled, what is the new threshold power?
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25. The bending loss in an optical fiber is proportional to:
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27. What is the primary reason for using dispersion-compensating fiber (DCF)?
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18. How does an increase in the core diameter affect multimode dispersion?
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7. Which of the following is NOT a nonlinear optical effect in fiber optics?
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9. Which of the following optical fiber types supports multiple propagation paths?
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