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High-speed picosecond pulse generation in semiconductor lasers with incoherent optical feedback
Optics Letters
|September 29, 2009
Summary
Researchers developed a new method using incoherent optical feedback to generate high-speed picosecond optical pulses from semiconductor laser diodes. This technique enables self-sustained pulsations for advanced optical applications.
Area of Science:
- Optics and Photonics
- Semiconductor Devices
- Nonlinear Dynamics
Background:
- Semiconductor laser diodes are crucial for generating optical pulses.
- Achieving high-speed picosecond pulse generation often requires complex techniques.
- Controlling carrier density dynamics is key to pulse modulation.
Purpose of the Study:
- To propose a novel method for generating high-speed picosecond optical pulses.
- To investigate the use of incoherent optical feedback for pulse generation.
- To analyze the underlying dynamics of carrier density modulation.
Main Methods:
- A novel method employing incoherent optical feedback was proposed.
- The method modulates carrier density in semiconductor laser diodes.
- The system is driven into a self-sustained pulsation state.
Main Results:
- High-speed picosecond optical pulses were successfully produced.
- Incoherent optical feedback induced successive pulselike modulation in carrier density.
- The repetition rate of the pulsations was determined by relaxation oscillations.
Conclusions:
- The proposed method offers a viable approach for generating picosecond optical pulses.
- Incoherent optical feedback is effective in achieving self-sustained pulsations.
- Relaxation oscillation dynamics play a critical role in determining pulse repetition rates.
