Related Experiment Video
Updated: Jun 20, 2026
08:48
Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
Stable pulses of variable width from a mode-locked hybrid TEA-CO2 laser
1Laboratoire de Recherches en Optique et Laser, Département de Physique, Faculté des Sciences et de Génie, Université Laval, Québec, GI K 7P4, Canada.
Optics Letters
|August 19, 2009
Summary
Researchers developed a new hybrid laser technique to enhance the stability of mode-locked pulses from a transversely excited atmospheric (TEA) CO2 laser. This method allows for tunable pulse widths between 1.8 and 10 nanoseconds.
Area of Science:
- Laser Physics
- Optics
- Physical Chemistry
Background:
- Mode-locked lasers, particularly transversely excited atmospheric (TEA) carbon dioxide (CO2) lasers, are crucial for various applications.
- Achieving stable and tunable pulse widths in these lasers presents a significant technical challenge.
Purpose of the Study:
- To introduce a novel technique for improving the stability of mode-locked pulses from TEA-CO2 lasers.
- To enable easy tuning of laser pulse widths.
- To present a theoretical model validating the experimental findings.
Main Methods:
- Implementation of a hybrid laser configuration incorporating a low-pressure continuous-wave (cw) gain cell.
- Mode-locking of the hybrid laser system.
- Experimental measurement and analysis of pulse width dependence on the modulation parameter (alpha).
Main Results:
- The new technique significantly enhances the stability of mode-locked pulses.
- The pulse width exhibits an alpha(-1.1) dependence when the cw gain cell is operational, compared to alpha(-0.5) without it.
- Achieved tunable pulse widths ranging from 1.8 to 10 nanoseconds.
Conclusions:
- The hybrid laser approach with a cw gain cell is an effective method for stabilizing and tuning TEA-CO2 laser pulses.
- The developed theoretical model accurately predicts the observed experimental results.
- This technique offers practical advantages for applications requiring precise control over laser pulse characteristics.
