How to Implement Optical fiber in OMNeT++
To implement an optical fiber communication system in OMNeT++ has needs to modelling the components of an optical network like transmitters, receivers, fibre links, and amplifiers.
Let our team handle your Optical fiber implementation in OMNeT++ efficiently. We focus on all the key mechanisms of optical networks, including transmitters, receivers, fiber links, and amplifiers, tailored to your projects for top-notch results. With all the latest tools at our disposal, we’ll make sure your work is completed on schedule. The given below are the procedures to implement a simple optical fiber communication system in OMNeT++ with practical examples.
Step-by-Step Implementation:
- Define the Optical Fiber Communication Architecture
- Components: Classify the key components of the optical network, such as:
- Optical Transmitter (Laser)
- Optical Receiver (Photodetector)
- Optical Fiber Link
- Optical Amplifiers (e.g., EDFA)
- Multiplexers/Demultiplexers (for WDM systems)
- Communication: State how the information will be transferred over the optical fibre, that has modulation schemes and signal propagation features.
- Create OMNeT++ Modules for Each Component
- Optical Transmitter Module: Design the laser source that involves modulation of the optical signal.
- Optical Receiver Module: To emulate the photodetector has conversion of optical signals to electrical signals.
- Optical Fiber Link Module: Design signal propagation via the optical fiber that involves attenuation and dispersion effects.
- Optical Amplifier Module: To emulate the signal amplification to compensate for losses.
Example: Optical Transmitter Module
simple OpticalTransmitter {
parameters:
double wavelength @unit(“nm”) = default(1550); // Wavelength in nanometers
double power @unit(“mW”) = default(1); // Output power in milliwatts
gates:
out opticalOut; // Optical signal output
}
Example: Optical Receiver Module
simple OpticalReceiver {
parameters:
double sensitivity @unit(“dBm”) = default(-30); // Receiver sensitivity
gates:
in opticalIn; // Optical signal input
}
Example: Optical Fiber Link Module
simple OpticalFiber {
parameters:
double length @unit(“km”) = default(10); // Fiber length in kilometers
double attenuation @unit(“dB/km”) = default(0.2); // Attenuation in dB per kilometer
double dispersion @unit(“ps/nm/km”) = default(17); // Dispersion parameter
gates:
in opticalIn; // Input optical signal
out opticalOut; // Output optical signal
}
- Implement the Internal Logic of Each Component
- Optical Transmitter Logic: To mimic the modulation process, converting electrical signals to optical signals.
- Optical Receiver Logic: To apply the detection process, converting optical signals back to electrical signals.
- Optical Fiber Link Logic: To execute signal attenuation, dispersion, and other impairments that occur during propagation.
- Optical Amplifier Logic: Mimic the amplification process that has noise figure and gain.
Example: Optical Transmitter Logic in C++
#include <omnetpp.h>
class OpticalTransmitter : public omnetpp::cSimpleModule {
protected:
virtual void handleMessage(omnetpp::cMessage *msg) override;
};
Define_Module(OpticalTransmitter);
void OpticalTransmitter::handleMessage(omnetpp::cMessage *msg) {
// Simulate optical signal generation
send(msg, “opticalOut”);
}
Example: Optical Fiber Link Logic in C++
#include <omnetpp.h>
class OpticalFiber : public omnetpp::cSimpleModule {
protected:
virtual void handleMessage(omnetpp::cMessage *msg) override;
};
Define_Module(OpticalFiber);
void OpticalFiber::handleMessage(omnetpp::cMessage *msg) {
// Simulate signal attenuation and dispersion
double attenuation = par(“attenuation”).doubleValue();
double length = par(“length”).doubleValue();
double powerLoss = attenuation * length;
// Modify the signal to represent attenuation
sendDelayed(msg, 0.001, “opticalOut”); // Propagation delay
}
- Integrate the Components in a NED File
- Define the connections between the optical transmitter, fiber link, and receiver.
- If using amplifiers, connect them appropriately along the fiber link.
Example: Optical Communication System Integration in NED
network OpticalNetwork {
submodules:
transmitter: OpticalTransmitter {
parameters:
wavelength = 1550;
power = 1;
}
fiber: OpticalFiber {
parameters:
length = 50; // 50 km fiber
attenuation = 0.2;
dispersion = 17;
}
receiver: OpticalReceiver {
parameters:
sensitivity = -30;
}
connections allowunconnected:
transmitter.opticalOut –> fiber.opticalIn;
fiber.opticalOut –> receiver.opticalIn;
}
- Run and Analyse the Simulation
- Compile: Make sure that all modules are compiled in OMNeT++.
- Execute: Execute the simulation and observe the optical signal propagation, attenuation, and reception.
- Analyse: Use OMNeT++ tools to Measure signal quality, power levels, and bit error rates.
- Advanced Features
- Wavelength Division Multiplexing (WDM): To execute WDM by generating multiple optical channels and using multiplexers and demultiplexers.
- Nonlinear Effects: To mimic nonlinear effects like self-phase modulation (SPM) and four-wave mixing (FWM).
- Amplifier Models: Execute more detailed models for optical amplifiers that has gain saturation and noise figure.
Example: Wavelength Division Multiplexing (WDM)
- Multiplexer: Integrate multiple optical signals at various wavelengths into a single fiber.
- Demultiplexer: Isolate the combined signal back into individual wavelengths at the receiver end.
Example: WDM Multiplexer in NED
simple WdmMultiplexer {
gates:
in opticalIn[4]; // 4 input wavelengths
out opticalOut; // Combined output
connections:
// Combine the inputs into the output
opticalIn[0] –> opticalOut;
opticalIn[1] –> opticalOut;
opticalIn[2] –> opticalOut;
opticalIn[3] –> opticalOut;
}
In the end of the simulation, we know and get knowledge about how to execute the optical fiber using OMNeT++ tool. If you need more information regarding the optical fiber we will provide that too.