Find the core radius necessary for a single mode operation, Electrical Engineering

Assignment Help:

Find the core radius necessary for a single mode operation at 1320nm of a step index fibre with n1=1.48 and n2=1.478. What are the N.A and maximum acceptance angle for this fibre?

Ans:

For a single mode step index fibre, V≤2.405

Take V= 2.4

Given  Λ= 1320nm

             n1=1.48

             n2=1.478

We have        V= Πd (n12- n22)½  / λ                                                            

Substituting the values of V, n1, n2, d and solving for Λ, we get

              d= 1.311 x 10-5 m

Hence, core radius is given by

    r=d/2= 6.555µm

Numerical aperture

                    Sinψ = (n12- n22)½= (1.482- 1.4782)½ =0.076

Maximum acceptance angle,

               ψmax= sin-1(0.076)

                       = 4.411°


Related Discussions:- Find the core radius necessary for a single mode operation

Successive-approximation analog to digital converter, Successive-approximat...

Successive-approximation analog to digital converter This converter, shown in Figure, also contains a D/A converter, but the binary counter is replaced by a successive-approxim

Domestic financial system, Q. "Developing countries could delay opening the...

Q. "Developing countries could delay opening the capital account until the domestic financial system is strong enough to withstand the sometimes flow of world capital and violen

How many wavelengths long is the line, Q. A transmission line with a dielec...

Q. A transmission line with a dielectric (εr = 3.5) is 100 m long. At a frequency of 10 GHz, how many wavelengths long is the line?

Explain about junction fet, Q. Explain about Junction FET? The JFET is ...

Q. Explain about Junction FET? The JFET is a three-terminal, voltage-controlled current device, whereas the BJT is principally a three-terminal, current-controlled current devi

Find the current, 1. A 1 μm long and 100 μm 2 cross-sectional area silicon...

1. A 1 μm long and 100 μm 2 cross-sectional area silicon bar is doped with 10 16 /cm 3 phosphorous. Use the graph below to: a. Find the current at 300°K with 10 V applie

Show the procedure of hex to decimal conversion, Q. Show the procedure of H...

Q. Show the procedure of Hex to Decimal Conversion? To convert from the Hex to the Decimal, multiply the value in each position by its hex weight and add each value. Using the

Digital storage oscilloscope , Q. Explain digital Storage Oscilloscope (DSO...

Q. Explain digital Storage Oscilloscope (DSO) with neat diagram, (b) Give the difference between analog and digital storage oscilloscope.   Principle of operation : The availa

Determine the fall-off rate, Q. A low-pass filter circuit is shown in Figur...

Q. A low-pass filter circuit is shown in Figure. Using a PSpice program and PROBE, obtain the Bode magnitude plot for the transfer function ¯H(f) = ¯V out / ¯V in for the frequ

Determine self inductance of coil, Determine self inductance of coil: ...

Determine self inductance of coil: A flux of 0.5 m Wb is generated by coil A of 600 turns wound on a ring with a current of 2 A in it. Determine (a) self inductance of coil A,

Field effect transistor, Field effect transistor: Primarily difference...

Field effect transistor: Primarily difference between bit and jet is that bit transistor is a current controlled device while jet is a voltage controlled device.  Is a direct

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