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Controllable harmonic mode locking and multiple pulsing in a Ti:sapphire laser.
Xiaohong Han1, Jian Wu, Heping Zeng
1State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China.
Optics Express
|June 11, 2008
Summary
Researchers demonstrated a novel method to control harmonic mode-locking in Ti:sapphire lasers. Varying the nonlinear medium
Area of Science:
- Laser Physics
- Nonlinear Optics
Background:
- Kerr-lens mode-locking (KLM) is a crucial technique for generating ultrashort laser pulses.
- Controlling harmonic mode-locking and multiple pulsing is essential for various applications.
Purpose of the Study:
- To demonstrate a new method for controlling harmonic mode-locking and multiple pulsing in a Ti:sapphire laser.
- To achieve this control without affecting the pulse duration.
Main Methods:
- Utilized a Ti:sapphire laser system.
- Introduced a nonlinear medium into the laser cavity.
- Varied the effective nonlinear length by adjusting the medium's position and the laser's pump power.
Main Results:
- Achieved stable harmonic mode-locking.
- Observed stable multiple-pulse operation.
- Maintained unaffected pulse duration during controlled mode-locking.
Conclusions:
- The effective nonlinear length is a key parameter for controlling harmonic mode-locking and multiple pulsing.
- This method offers precise control over laser output characteristics.
