Calculate the v number and the number of guided modes, Electrical Engineering

Assignment Help:

A multimode step index fibre along with a core diameter of 80µm and a associative refractive index difference of 1.5% is operating at a wavelength of 0.85µm. If the core refractive index is 1.48, calculate the V number and the number of guided modes.

Given, core diameter, d=80µm
Δ=1.5%=0.015
Λ=0.85µm
n1=1.48
We know that Numerical Aperture,
Sinψ = n1 (2Δ)½
=1.48 (2 x 0.015)½
=0.2563
i.e. (n12- n22)½ =0.2563
(1.482- n22)½ =0.2563
Squaring,
1.482- n22 =0.0657
i.e. n2=1.4576
We know that V number is given through
V= Πd (n12- n22)½ / Λ

Substituting the values for d, n1, n2 and Λ, we get
V=75.78
Take V=76

Number of modes= V2 /2= 762 /2 = 2888


Related Discussions:- Calculate the v number and the number of guided modes

Explain the discrete time systems, Explain the Discrete Time Systems? A...

Explain the Discrete Time Systems? A system operates on an input signal, x[n] and output the results, y[n]. For example, a digital filter (a system) can be represented by the f

Sinusoidal steady-state phasor analysis, Q. Sinusoidal steady-state phasor ...

Q. Sinusoidal steady-state phasor analysis? The kind of response of a physical system in an applied excitation depends in general on the type of excitation, the elements in the

Calculate the active and reactive power, The variable resistor Z o in the ...

The variable resistor Z o in the circuit shown in Fig. 1  is adjusted until maximum average power is delivered to Zo. a)  Find the value of Z o b)  Calculate the maximum av

Second Order Precesses, A second-order process with one pole at the origin ...

A second-order process with one pole at the origin has the transfer function 3/(s(2s + 1)) Find the output as a function of time, for a unit step input change. Sketch the expected

Difference among microprocessor and microcontroller, In Microprocessor more...

In Microprocessor more op-codes, few bit handling instructions. But in Microcontroller: fewer op-codes, more bit handling Instructions, and also it is described as a device that ha

What is the need of modem in data communication, Q. What is the need of MOD...

Q. What is the need of MODEM in data communication? Need of Modem: Modems are used to interface computers, computer networks in addition to other terminal equipment to teleco

What are the hardware elements in the embedded systems, What are the hardwa...

What are the hardware elements in the embedded systems? Hardware Elements in the Embedded Systems are as follows: (i) Power Source (ii) Clock Oscillator Circuit and Clock

Explain open loop control systems, Explain Open Loop Control Systems In...

Explain Open Loop Control Systems In an open-loop control system, the controller independently computes exact voltage or current required by the actuator to do the job and send

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