1. Simulation and Analysis of Single Mode Semiconductor Laser
Course Project for EE8114
Electrical Engineering Dept.
Ryerson University
Grace FENG

2. Outline of My Work Background Research on Fiber over Radio
Close Study on the Simulink Based
Semiconductor Laser Diode Model
Repeat the Simulation Results from the
Previous Work
Build Simulation Functions to Analyze
the Optical Response of the Laser
Diode

3. Large-Signal Simulink Model
Rate Equation for Carrier Density and
Photon Density
S.A. Javro & S.M. Kang
“Transforming Tucker’s Linearized Laser Rate Equations to a Form that has a Single Solution Regime”
Journal of Lightwave Technology, 1995

4. Large-Signal Simulink Model, Cont.
Toby Schaer, Robert Rusnov, Stephen Eagle, Jay Jastrebski, Steven Albanese and Xavier Fernando
“A Dynamic Simulation Model for Semiconductor Laser Diodes”
CCECE 2003 – CCGEI 2003, Montreal, May/mai 2003

5. Operating Point
Pumping Current (mA)
Electron Density (m-3)
Photon Density (m-3)
10mA
* 1018
* 1013
15mA
1.9571* 1018
* 1014
STATE SPACE MODEL
Using the operating point values to complete State Space Model, so that to enable simulation around operating point.

6. Small-Signal Simulink Model
Current Input
Rectanglur Pulse
Amplitude = 1mA
Photon Output
State Space Model
Implemented in Matlab
Pumping Current
(10mA, 15mA)
Pulse Response when bias point of I = 10mA
Pulse Response when bias point of I = 15mA

7. Sinusoidal Signal Response

8. Sinusoidal Signal Response, Cont.
Amplitude of Input Signal
Increased from 0.001mA to 1mA
Stepped by 0.001mA
Simulating System Response
100 Times
Sampling the Input
Amplitude each Time
Sampling the Output
Amplitude each Time
Plot the Relationship between
Input and Output Amplitude
Analyze the Result

9. Sinusoidal Signal Response, Cont.
Sample Phase Shift during Each Simulation
Plot the Relationship between Input Amplitude with Output Phase Shift

10. Conclusion Small Input Eletronic Signal around Operating
Point of a Laser Diode could Lead to Linear
Optical Response in Terms of Amplitude
Phase Shift in Optical Response around
Operating Point Does Not Respond to Any
Changes in Input Electronic Signal