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

Relative and absolute motion measuring device, a) With the help of a neat a...

a) With the help of a neat and clean sketch illustrate the difference between relative and absolute motion measuring device. b) Discuss electromechanical methods for calculating

Determine the line-to-line voltage at the load terminal, Q. A balanced delt...

Q. A balanced delta-connected load has a per-phase impedance of 45 60° . It is connected to a three-phase, 208-V, 60-Hz supply by a three- phase feeder that has a per-phase impeda

Allocative efficiency, Allocative Efficiency: A neoclassical concept refer...

Allocative Efficiency: A neoclassical concept referring to allocation of productive resources (labour, capital, etc.) in a manner that best maximizes well-being (or 'utility') of

Microcontroler based elevator system, -micro controller AT89C51 -dc motor -...

-micro controller AT89C51 -dc motor -magnetic sensors -load sensors -how to connect all the components? and give me a circuit diagrams -how to interface all the component with m

Sketch the spectrum of a standard am signal, If the message has a spectrum ...

If the message has a spectrum where K and Wf are positive constants, sketch the spectrum of a standard AM signal that uses the message. Comment on the physical signi?cance

Energy stored in inductor, One circuit has resistor 40? connected in series...

One circuit has resistor 40? connected in series with inductor  15H and dc voltage 220V. Calculate: i)  Time constant ii)  Current at time (i) iii)  Current at time 0.0

What is the purpose of carry flag and zero flag, What is the purpose of car...

What is the purpose of carry (c) flag and zero (z) flag? Carry flag conatins the carry after addition or borrow after subtraction. This carry flag also shows error conditions,

Define the time constant of the circuit, A coil of inductance 0.04 H and re...

A coil of inductance 0.04 H and resistance 10? is connected to a 120 V, d.c. supply. Verify (a)  The final value of current     (b)  The time constant of the circuit (c)

Determine phase - voltage and power, Determine phase - voltage and power: ...

Determine phase - voltage and power: A balanced star connected load is supplied from a symmetrical 3-phase 440 Volt system. The current in each of the phase is 40 Amp and lags

Illustrate core losses in magnetic core material, Q. Illustrate Core Losses...

Q. Illustrate Core Losses in magnetic core material? Iron-core losses are usually divided into two components: hysteresis loss and eddy-current loss. The former is proportional

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