Modal Dispersion. A step-index fiber of numerical aperture NA = 0.16, core radius a 45 um, and core refractive index n, = 1.45 is used at A, = 1.3 um, where material dispersion is negligible. If a light pulse of very short duration enters the fiber at t = 0 and travels a distance of 1 km, sketch the shape of the received pulse: (a) Using ray optics and assuming that only meridional rays are allowed. (b) Using wave optics and assuming that only meridional (l = 0) modes are allowed. %3D

Modal Dispersion. A step-index fiber of numerical aperture NA = 0.16, core radius a 45 um, and core refractive index n, = 1.45 is used at A, = 1.3 um, where material dispersion is negligible. If a light pulse of very short duration enters the fiber at t = 0 and travels a distance of 1 km, sketch the shape of the received pulse: (a) Using ray optics and assuming that only meridional rays are allowed. (b) Using wave optics and assuming that only meridional (l = 0) modes are allowed. %3D

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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cource/content/1/Normalized%20Frequency%20and%20Examples.pdf 616 81% Example A step index fiber has n, = 1.424. the acceptance angle from air to the fiber if 8.5°. %3D Find: a. Numerical aperture b. Refractive index of the cladding C. Acceptance angle if the outside medium is changes to water (n = 1.33) ans: a) NA = 0.148, b) n2 = 1.416, c) 0a = 6.38° %3D Example
If an air filled waveguide made out of aluminum (0=3.5x1070=3.5x107 S/m) has dimensions a=5cm and b=3cm, which will be its dominant cut off frequency? 1. How many modes will propagate in the waveguide described in Problem#1 if the operation frequency is 9.4GHZ? 2. Assume this waveguide is shorted at 4cm to convert it in a cavity. It will Select one: a. have a dominant mode. b. work the same as the waveguide. C. not have a dominant mode. d. have the same dominant mode as the waveguide.
The answers according to the book are (a) 3 cm, (b) 6.52 GHz, (c) 3.957 x 10^8 m/s, (d) 2.274 x 10^8 m/s, (e) 3.957 cm
It is made of a fiber core with an index of refraction of 1.8 and a coating with an index of refraction of 1.7 of a 2km long optical fiber cable in the air environment. Determine the acceptance angle 0, and the maximum usable data rate of signals that can be transmitted over the fiber. a = 16.25°, fp = 0.2Mb. s-¹ 0a 16.25°, fp = 6.1Mb.s¹ 9a-46.7°, fp = 1.6Mb.s¹ Qa = -25.18°, fp = 4.3Mb. s¹ Ba= 36.27°, fp = 0.7Mb.s¹
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A step index fiber in air has a numerical aperture of 0.16, a core rofractive index of 1.45 and a core diameter of 60 µm. Determine the normalized frequency for the fiber when light at a wavelength of 0.9 pum is transmitted. Further, estimate the number of guided modes propagating in the fiber. Q.1/B
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