The document provides instructions for 6 experiments using OptSim software. Experiment 1 creates a basic network to transmit a 10Gb/s NRZ signal over 50km fiber and measure the output. Experiment 2 adds parameter scanning to vary the fiber length and observe its effect. Experiment 3 adds an EDFA preamplifier to the receiver section. Experiment 4 transmits a 9.953Gb/s signal over 3 fiber spans with EDFAs. Experiment 5 is similar but introduces parametric scanning of the receiver attenuation. Experiment 6 uses iteration loops with parametric runs.

1. Experiments Manual
OPTSIM 5.1
Ex 1. Create a network example
Ex 2. Parameter scan
Ex 3. Edfa as preamplifier-GS first
Ex 4. Spans and EDFA- GS 1
Ex 5. Spans and EDFA using parametric run-GS 2
Ex 6. Iteration Loop and Parametric run-GS 3
For the labs of BVPCOE, New Delhi 1

2. Experiment no 1
Prerequisite: OptSim User Guide- section 2.2- ‘Setting up your first simulation’
Aim:
To create a network in which a 10 Gb/s NRZ optical signal is launched into 50 km of standard single
mode fibre. In the receiver section the optical signal is detected using a PIN photo detector.
Measurements:
Measurements include the electrical spectrum, eye diagram and Q estimation.
Components:
• Transmitter section: Logical Sources- Data Source; Laser source-CW Lorentzian Laser; Optical
Modulator- Sin 2 Amplitude Modulator; Modulator Driver-NRZ Rectangular
• Channel: Fiber
• Receiver Section: sensitivity optical Receiver
• Measurement components: Optical power Meter, Optical Spectrum Analyser, electrical Scope
Procedure:
1. Create the network as shown in diagram. Check the properties of each component.
2. Simulate the network.
3. Compare the readings of two power meters and find out the reason for difference.
4. Check the optical spectrum analyser’s waveform and compare the centre frequency with the
frequency of laser source.
5. Check the waveform of electrical scope and find out the readings for Eye opening, closing, Q
factor, jitter, BER etc.
For the labs of BVPCOE, New Delhi 2

3. Results- Experiment no 1
1. Optical power at opowme1 Run(s): 1
Power [dBm] = -6.053
Power [mW] = 0.248E+00
2. Optical power at opowme2 Run(s): 1
Power [dBm] = -16.032
Power [mW] = 0.249E-01
3.
4.
For the labs of BVPCOE, New Delhi 3

4. Experiment no 2
Prerequisite: OptSim User Guide- section 2.2- ‘Setting up your first simulation’
Aim:
To create a network in which a 10 Gb/s NRZ optical signal is launched into 10 km of standard single
mode fibre. In the receiver section the optical signal is detected using a PIN photodetector.
To view the effect when the length of fibre is varied using parameter scan.
Measurements:
Measurements include the electrical spectrum, eye diagram and Q estimation.
Components:
Transmitter section: Data Source; Laser source; Amplitude Modulator; Modulator Driver
Channel: Single Mode Fiber
Receiver Section: sensitivity optical Receiver
Measurement components: Optical power Meter, Optical Spectrum Analyser, electrical Scope
Experiment 2- Diagram 1
Cont.....
For the labs of BVPCOE, New Delhi 4

5. Experiment no 2
Experiment 2- Diagram 2
Procedure:
1. Create the network as shown in diagram 1. Check the properties of each component.
2. Click on symbol button. Then click on Add button. Type a parameter L and value as 10.0.
3. Click on fibre properties/Length. Assign value’ L’ as the length of fibre.
4. Click on Scan button, then click on add column. Param1 as L will be appeared.
5. Click on append row for 6 times. Assign the values of L as 10.0, 20.0, 30.0, 40.0, 80.0, 100.0.
6. Compare the results for all the values. You will find the poorer response as the length
increases.
7. Check the optical spectrum analyser’s waveform for all values of L.
8. Check the waveform of electrical scope and find out the readings for Eye opening, closing, Q
factor, jitter, BER etc, for all values of L.
For the labs of BVPCOE, New Delhi 5

6. Results- Experiment no 2
1.
Optical power at opowme1 Run(s): 1 2 3 4 5 6
Power [dBm] = -6.032
Power [mW] = 0.249E+00
2.
Optical power at opowme2 Run(s): 1
Power [dBm] = -8.079
Power [mW] = 0.156E+00
------------------------------------------------------
Optical power at opowme2 Run(s): 2
Power [dBm] = -10.111
Power [mW] = 0.975E-01
------------------------------------------------------
Optical power at opowme2 Run(s): 3
Power [dBm] = -12.107
Power [mW] = 0.616E-01
------------------------------------------------------
Optical power at opowme2 Run(s): 4
Power [dBm] = -14.093
Power [mW] = 0.390E-01
------------------------------------------------------
Optical power at opowme2 Run(s): 5
Power [dBm] = -22.051
Power [mW] = 0.624E-02
------------------------------------------------------
Optical power at opowme2 Run(s): 6
Power [dBm] = -25.964
Power [mW] = 0.253E-02
3.
Superimposed Optical Spectrum for all runs
For the labs of BVPCOE, New Delhi 6

7. Cont.. Results- Experiment no 2
4.
Superimposed Eye Diagrams for all runs
For the labs of BVPCOE, New Delhi 7

8. Experiment no 3
Prerequisite: OptSim User Guide- section 2.2- ‘Setting up your first simulation’
Aim:
To create a network in which a 10 Gb/s NRZ optical signal is launched into 50 km of standard single
mode fiber. In the receiver section a 980-nm pumped EDFA is used a preamplifier. The optical signal
is filtered and detected using a PIN photodetector.
Measurements:
Measurements include the electrical spectrum, eye diagram and Q estimation.
Components:
Transmitter section: Data Source; Laser source; Amplitude Modulator; Modulator Driver
Channel: Single Mode Fiber
Receiver Section: sensitivity optical Receiver; filters, EDFA
Measurement components: Optical power Meter, Optical Spectrum Analyser, electrical Scope
Path: ProductInstDir/examples/optsim/sample_mode/Getting_started/First
Procedure:
1. Open the network from the given path or create the network by selecting the components
from the Model Palettes as shown in diagram. Check the properties of each component.
2. Simulate the network.
3. Check the waveform of electrical scope and find out the readings for Eye opening, closing, Q
factor, jitter, BER etc.
4. Compare the readings of two electrical scopes and find out the reason for difference.
Compare them using superimpose option. For this, open one waveform then go to Optsim
data display block. Then click on another waveform (run 1). Then click on superimpose
button.
5. For more details, go through application notes guide.
For the labs of BVPCOE, New Delhi 8

9. Results- Experiment no 3
For the labs of BVPCOE, New Delhi 9

10. Experiment no 4
Prerequisite: OptSim User Guide- section 2.2- ‘Setting up your first simulation’
Aim:
A 9.953 Gb/s NRZ optical signal is launched into 3 spans of Dispersion Shifted Normal fiber, each 50
km in length. The fiber loss is recovered by 980- nm pumped EDFA before each span and after the
third span. The optical signal is passed through a raised-cosine filter and detected by a sensitivity
receiver. The electrical output of the receiver is passed through a Bessel filter.
Measurements:
Measurements include the optical spectrum, detected electrical spectrum, eye diagram and Q
estimation
Path: ProductInstDir/examples/optsim/sample_mode/Getting_started/Getting_started_1
Procedure:
1. Open the network from the given path or create the network by selecting the components
from the Model Palettes as shown in diagram. Check the properties of each component.
2. Simulate the network.
3. Check the waveform of all optical spectrums by superimposing them. Also look Eye Diagram
in electrical scope and find out the readings for Eye opening, closing, Q factor, jitter, BER etc.
4. Compare the readings of Electrical Spectrum in two electrical scopes and find out the reason
for difference. Compare them using superimpose option. For this, open one waveform then
go to Optsim data display block. Then click on another waveform (run 1). Then click on
superimpose button.
5. For more details, go through application notes guide.
For the labs of BVPCOE, New Delhi 10

11. Results- Experiment no 4
For the labs of BVPCOE, New Delhi 11

12. Cont.. Results- Experiment no 4
For the labs of BVPCOE, New Delhi 12

13. Experiment no 5
Prerequisite: OptSim User Guide- section 2.2- ‘Setting up your first simulation’
Aim:
A 9.953 Gb/s NRZ optical signal is launched into 3 spans of Dispersion Shifted Normal fiber, each 50
km in length. The fiber loss is recovered by 980- nm pumped EDFA before each span and after the
third span. The optical signal is passed through a raised-cosine filter and detected by a sensitivity
receiver. The electrical output of the receiver is passed through a Bessel filter. The parametric run
feature is introduced to show how it may be used to vary the optical attenuation at the
receiver.
Measurements:
Measurements include the optical spectrum, detected electrical spectrum, eye diagram and Q
estimation
Path: ProductInstDir/examples/optsim/sample_mode/Getting_started/Getting_started_2
Procedure:
1. Open the network from the given path or create the network by selecting the components
from the Model Palettes as shown in diagram. Check the properties of each component.
2. Click on scan button. Click on symbols and scan parameter. Check for the different
parameters assigned to Rx_attn. Click on Start: Parameter Scan.
3. Check the waveform of all optical spectrums by superimposing them. Also look Eye Diagram
in electrical scope and find out the readings for Eye opening, closing, Q factor, jitter, BER etc.
4. Compare the readings of Electrical Spectrums in electrical scopes for various values of
Rx_attn and find out the reason for difference. Compare them using superimpose option. For
this, open one waveform then go to Optsim data display block. Then click on another
waveform (run 1). Then click on superimpose button.
5. For more details, go through application notes guide.
For the labs of BVPCOE, New Delhi 13

14. Results- Experiment no 5
Superimposed Optical Spectrum output for Run 1. Similarly take output for Run 2, 3, 4.....
Superimposed Electrical Spectrum output for Run 1. Similarly take output for Run 2, 3, 4.....
For the labs of BVPCOE, New Delhi 14

15. Experiment no 6
Prerequisite: OptSim User Guide- section 2.2- ‘Setting up your first simulation’
Aim:
A 9.953 Gb/s NRZ optical signal is launched into an iteration loop of 3 spans of Dispersion Shifted
Normal fiber, each 50 km in length. The optical signal is passed through a raised-cosine filter and
detected by a sensitivity receiver. The electrical output of the receiver is passed through a Bessel
filter. The parametric run feature is introduced to show how it may be used to vary the optical
attenuation at the receiver.
Measurements:
Measurements include the optical spectrum, detected electrical spectrum, eye diagram and Q
estimation
Path: ProductInstDir/examples/optsim/sample_mode/Getting_started/Getting_started_3
Procedure:
1. Open the network from the given path or create the network by selecting the components
from the Model Palettes as shown in diagram. Check the properties of each component.
2. Click on scan button. Click on symbols and scan parameter. Check for the different
parameters assigned to Rx_attn. Click on Start: Parameter Scan.
3. Check the waveform of all optical spectrums by superimposing them. Also look Eye Diagram
in electrical scope and find out the readings for Eye opening, closing, Q factor, jitter, BER etc.
4. Compare the readings of Electrical Spectrums in electrical scopes for various values of
Rx_attn and find out the reason for difference. Compare them using superimpose option. For
this, open one waveform then go to Optsim data display block. Then click on another
waveform (run 1). Then click on superimpose button.
5. For more details, go through application notes guide.
For the labs of BVPCOE, New Delhi 15

16. Results- Experiment no 6
Superimposed output of b49-Span1, 2, 3; Run 1
Superimposed output of Output_third_Span and Output_filtered; Run1.
For the labs of BVPCOE, New Delhi 16

17. Cont.. Results- Experiment no 6
Output of Eye Diagram from “Received”; Run1
Superimposed output of Electrical Spectrum of Received and Received_Prefilter; Run1.
For the labs of BVPCOE, New Delhi 17