Fibre optics, Electrical Engineering

Assignment Help:
1. A very narrow laser beam in air is shone into a sphere of solid glass that has a uniform
refractive index n>1 and radius ? . The beam makes an angle a in air with the normal to
the surface of the sphere.
Sketch the path of the beam in the circular cross-section of the sphere defined by the
normal and the beam direction, and show all reflected and transmitted rays.
Explain why the beam cannot become a bound whispering gallery ray propagating around
the inside the glass-air surface of the sphere.
2. An asymmetric, multimode, step-profile slab waveguide has a core index of 1.49. The
cladding index above the core has value 1.47 and the cladding index below the core has
value 1.48. Rays propagate in the core in the x-z plane and make an angle ?z relative to
the z-axis along the centre of the waveguide.
(a) Determine the range of (positive) values of ?z in degrees for which only bound rays
will propagate along the waveguide.
(b) How many different types of rays can propagate along the waveguide?
Sketch a typical path for each type of ray.
(c) Determine the values of ?z in degrees that delineate between the 3 types of ray paths.

Related Discussions:- Fibre optics

Determine the node voltage, Determine the node voltage: Determine the ...

Determine the node voltage: Determine the node voltage V and then current flowing through each element by using KCL. Solution Apply KCL at the node whose voltage is V.

Explain working of encoders, Explain working of Encoders? Encoding is t...

Explain working of Encoders? Encoding is the process of forming an encoded representation of a set of inputs, and it is the converse of the decoding operation. An encoder is a

Calculate the e.m.f. generated in armature of a d.c. machine, The armature ...

The armature of a d.c. machine has a resistance of 0.3 and is connected to a 200V supply. Calculate the e.m.f. generated when it is running (a) as a generator giving 80A (b) as a

Points of verification, Points of Verification of Connection i) Phase...

Points of Verification of Connection i) Phase association ii) CT polarity iii) VT polarity iv) Phase angles v)  Phase sequence vi) System conditions - unbalanc

Principle of three-phase synchronous machines, Q. Principle of Three-phase ...

Q. Principle of Three-phase synchronous machines? In fact, with very few exceptions, three-phase synchronous machines are most commonly used for power generation. In general, t

Electrical circuits and systems, Electrical circuits and systems : Elec...

Electrical circuits and systems : Electrical systems allow energy to be conveniently delivered from the point of supply to the point of application - e.g. electric railways, ca

Current trasnsformer, A 13.8 kV feed er circui t breaker has a 600:5 multir...

A 13.8 kV feed er circui t breaker has a 600:5 multira tio curr ent transform er with charact eristics as show n in Figure 5.11. Th e max - imum load on the feed er is 80 A pri mar

Show limitations of microprocessor-based control systems, Q. Show limitatio...

Q. Show limitations of microprocessor-based control systems? Practical limitations of microprocessor-based control systems stem from the following considerations: • Finite-w

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd