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

Switching characteristics during turn on , Switching characteristics during...

Switching characteristics during turn on A positive  gate  pulse  between  gate and  cathodeis sufficient to turn  on a thyrisotr. In  this period  thyristor  changes its stat

Write a short note on the working of darlington amplifier, Q. Write a sho...

Q. Write a short note on the working of Darlington Amplifier? A Darlington Amplifier is one that is employing the Darlington pair of transistors. It is a

Zero flag - registers , Zero Flag - Registers If the  result of any  a...

Zero Flag - Registers If the  result of any  arithmetical  or logical  operation in the accumulator  is zero i ,e  all the bits  of accumulator  ( with  some exceptions )  are

Demand meters, Demand Meters Demand meters measure volt-amperes (in kV...

Demand Meters Demand meters measure volt-amperes (in kVA), that merge both reactive (reflected) and actual (consumed) power. In its easiest form, a demand meter has a gauge wh

What do you mean by double word, Q. What do you mean by Double Word? A ...

Q. What do you mean by Double Word? A double word is precisely what its name implies, two words. Thus, a double word quantity is 32 bits. Logically, this double word can be div

On which hysteresis loss is least depend, Hysteresis loss least depends on ...

Hysteresis loss least depends on (A) Frequency.                         (B) Magnetic field intensity. (C) Volume of the material.     (D)Grain orientation of material.

Determine the critical load, A rocket on a test stand is modeled as a colum...

A rocket on a test stand is modeled as a column clamped at x = 0 and free at x = L, and subjected to compressive force P applied at the free end. The direction of load P remains

Voltage regulator, Voltage regulator: A voltage regulator is an electr...

Voltage regulator: A voltage regulator is an electrical regulator intended to automatically keep a constant voltage level. A voltage regulator is an instance of a negative fee

Find the voltage gain of the overall circuit, Q. Find the voltage gain of t...

Q. Find the voltage gain of the overall circuit? (a) Consider the circuit of the inverting amplifier shown in Figure (a), including an ideal op amp. Show that the voltage gain

Explain branch prediction logic in pentium, Explain Branch prediction logic...

Explain Branch prediction logic in Pentium. Branch prediction logic in Pentium: The Pentium microprocessor utilizes branch prediction logic to decrease the time needed for a

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