Reference no: EM132516087 , Length: word count:4000
Assignment -
TASK - Answer all the questions below and present your answers in a clear and concise technical report.
Q1. A 1.3 μm optical system operating at 100Mb/s is designed using following components:
- LASER with an optical power of 100μW ii.
- Fiber (in 2 km lengths) with attenuation 1dB/km,
- Splice loss 0.2dB every 2km,
- 1-dB connector loss
- Receiver with a sensitivity100-nW,
- 6-dB power margin.
a) Draw a schematic diagram of your system.
b) Calculate the maximum transmission distance?
c) Use excel to make the link budget of the system.
d) Plot variation in power with distance from transmitter to receiver.
e) Repeat the design of the link if an inline amplifier with gain of 10 is available.
f) Simulate the setup in Optiwave and show output results.
g) Discuss the differences in answers in mathematical calculation and simulation.
Q2. Design an optical system that will transmit 2-Gb/s NRZ signal over a 100-km fiber. The error rate of the system must be less than 10-9. Use a thermal-noise limited photodiode that requires a SNR of 21.5dB to achieve 10-9 BER.
i. Select a suitable laser, fiber and p-i-n photodiode. Clearly indicate reasons for your choice.
ii. Show the power and rise-time budgets for the system.
iii. Implement your designed system in Optiwave to confirm results.
iv. Explain differences in theoretical and simulated results.
Word count: 4000 words.