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Optical square-wave generation in a semiconductor laser with optoelectronic feedback.
Optics Letters
|December 16, 2021
Summary
We demonstrate self-sustained optical square-wave generation using a semiconductor laser diode with delayed optoelectronic feedback. This method allows for tunable repetition rates and duty cycles, offering a novel approach to optical signal generation.
Area of Science:
- Nonlinear Optics
- Semiconductor Lasers
- Optoelectronics
Background:
- Semiconductor lasers are crucial optoelectronic devices.
- Controlling laser output dynamics is essential for applications.
- Nonlinear effects in lasers can lead to complex dynamics.
Purpose of the Study:
- To report self-sustained optical square-wave (SW) generation.
- To investigate the role of delayed optoelectronic feedback.
- To explore the tunability of SW parameters.
Main Methods:
- Utilizing a semiconductor laser diode.
- Implementing delayed optoelectronic feedback on injection current (J).
- Leveraging nonlinear effects in the laser and feedback loop.
Main Results:
- Achieved self-sustained optical square-wave generation.
- Repetition rate is an integer multiple of the inverse loop delay.
- Duty cycle is tunable via injection current (J).
Conclusions:
- Delayed optoelectronic feedback enables novel optical waveform generation.
- The developed optoelectronic oscillator offers controllable SW output.
- This technique provides a method for generating tunable optical square waves.
