OCSim Modules: Module 3b

OCSim Modules

Modern Fiber Optic Communication Systems Simulations with Advanced Level Matlab Modules


Module 3b



Carrier Density and Optical Power of Laser Diodes for Pulsed Currents


(1) Use the Existing Modules / Components for Your Research Papers, Research Projects, Theses and Lab Simulation Experiments.
(2) Modify the Modules / Components to the Next Level for Your Research Papers, Research Projects and Theses.
(3) Integrate Different Modules / Components in the OCSim Package to Realize Your Own Fiber Optic Communication Systems.
(4) Modify the Modules for Co-Simulations with the Third Party Commercial Optical Communication Systems Softwares.


Main Module


The laser rate equations for pulses in a laser diode are simulated to obtain the photon density and carrier density.

This Module calls the following Sub Module / Component:

(1) rate_eqn_pulse.m
Solves the laser rate equations for pulses in a laser diode.

Explore Further this Module:

3b.1 Use a current pulse instead of the dc current (with a suitable DC bias so that the laser is biased above threshold). Let the first pulse be located at 5 ns with T0 (as defined in the code, rate_eqn_pulse.m) = 3ns. Modify the code to introduce three current pulses corresponding to a bit pattern of ’1101’ of a 100 Mb/s signal. Plot the output power (and also electron density) as a function of time. Explain any distortions you observe in the plot of optical power vs time. Are the optical power pulses broader than the current pulses?

3b.2 Repeat (3b.1) for a bit pattern of ’1101’ of a 200 Mb/s signal. Can you transmit 200 Mb/s signal using this laser diode? Provide explanation.




OCSim Modules details can be seen by clicking the pages below:

OCSim Modules Overview | OCSim Modules (1-17) in the Package

Module (1a) | Module (1b) | Module (1c) | Module (2a) | Module (2b) | Module (2c) | Module (3a) | Module (3b) | Module (4a) | Module (4b) | Module (4c) | Module (4d) | Module (5) | Module (6a) | Module (6b) | Module (7) | Module (8a) | Module (8b) | Module (8c) | Module (9a) | Module (9b) | Module (10) | Module (11a) | Module (11b) | Module (12) | Module (13) | Module (14) | Module (15) Module (16) Module (17)

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