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Algorithm-based continuous pulse duration tuning and performance control of a mode-locked laser diode
N K Metzger1, V F Olle, A Wonfor
1SUPA School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9SS, UK. nkm2@st-andrews.ac.uk
Optics Express
|March 29, 2012
Summary
A new control algorithm stabilizes monolithic mode-locked laser diodes, allowing continuous pulse duration tuning without instability. This innovation simplifies laser operation for practical applications.
Area of Science:
- Optics and Photonics
- Laser Physics
- Semiconductor Devices
Background:
- Monolithic mode-locked laser diodes (MLLDs) are crucial for various applications but suffer from inherent stability issues.
- Q-switching instabilities can limit the operational flexibility and performance of MLLDs.
- Precise control over pulse duration is essential for advanced photonic applications.
Purpose of the Study:
- To develop a control algorithm for stabilizing MLLDs.
- To enable continuous and stable tuning of pulse duration.
- To facilitate simultaneous control of output power and wavelength.
Main Methods:
- A novel control algorithm was designed and implemented.
- The algorithm was demonstrated on two distinct laser diode geometries.
- Pulse duration tuning was performed across a wide range.
Main Results:
- The algorithm successfully prevented Q-switching instabilities during continuous pulse duration tuning.
- Achieved continuous pulse duration tuning from 0.5 ps to 2.2 ps and 1.2 ps to 10.2 ps.
- Demonstrated simultaneous control over output power and wavelength.
Conclusions:
- The developed algorithm effectively addresses stability issues in MLLDs.
- Enables user-friendly, 'push-button' control over laser parameters.
- Enhances the practical applicability of MLLDs in diverse fields.
