Calculate the maximum length of an optical fibre, Electrical Engineering

Assignment Help:

Calculate the maximum length of an optical fibre that exhibits 0.8dB/km attenuation if the optical output is 10mW and the power launched at the input is 150mW. [Hint: Loss, L=10 log (Po/Pi)]

Ans:

      Given 

                Po=10mW

                Pi=150mw

We have

           Loss, L=10 log (Po/Pi)

       Substituting for Po and Pi,

         L= -11.76dB

For 1km , the loss is 0.8dB.

Let the length of the cable be x km. Then, for x kms, the loss is -11.76dB.

Solving for x, we have

         x= (11.76 x 1)/0.8

           =15km

i.e the length of the cable is 15km approximately.


Related Discussions:- Calculate the maximum length of an optical fibre

12345, how do you get better at school

how do you get better at school

Give the basic structure of a basic dma module, a) Give four features that ...

a) Give four features that were traditionally reserved to RISC architectures? b) Determine the overall throughput for 21 sequential instructions assuming a four-stage pipeline a

Explain in brief about the robots, Explain In brief about the Robots - ...

Explain In brief about the Robots - Robot is programmed with a series of instructions that enable it to carry out a series of tasks - On the other hand, an operator manually

Explain working of resistance-capacitance coupled amplifiers, Q. Explain wo...

Q. Explain working of Resistance-capacitance coupled Amplifiers? Resistance-capacitance (RC)-coupled  Amplifiers : The following figure illustrates the most widely used method

Discuss the characteristics of embedded systems, Problem : a) What is a...

Problem : a) What is an "Embedded System"? Discuss the characteristics of Embedded Systems. b) Describe three downfalls of "Embedded Systems". c) Explain the difference b

Explain junction transistors (npn and pnp), Explain junction transistors (n...

Explain junction transistors (npn and pnp). Junction Transistor: This transistor consists of two p-n junctions combined in one crystal as demonstrated in figure below.

What are the constructional features of dc machines, Q. What are the Constr...

Q. What are the Constructional Features of DC Machines? Adc generator ormotormay have asmany as four fieldwindings, depending on the type and size of the machine and the kind o

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