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Development of variable pulse width mode-locked femtosecond laser by applying coherent coupling technology
Optics Letters
|December 16, 2014
Summary
A new femtosecond laser system uses coherent coupling to control pulse width. This novel laser technology allows for variable pulse widths, tunable from 150 fs to 1.5 ps with high resolution.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Mode-locked lasers are crucial for various scientific applications.
- Controlling pulse width in femtosecond lasers presents a significant challenge.
Purpose of the Study:
- To develop a novel femtosecond mode-locked laser system with variable pulse width control.
- To demonstrate the effectiveness of coherent coupling technology for pulse width tuning.
Main Methods:
- A laser system composed of two fiber ring lasers sharing an output coupler was designed.
- Coherent coupling technology was employed to link the laser modules.
- Cavity length tuning was used to control longitudinal mode spacing and output modes.
Main Results:
- The developed laser system achieved a tunable pulse width ranging from approximately 150 fs to 1.5 ps.
- A length deviation of approximately 500 μm resulted in a change in output pulse width.
- The system demonstrated a fine-tuning resolution of 10 fs.
Conclusions:
- The novel femtosecond mode-locked laser system successfully achieved variable pulse width control.
- Coherent coupling technology is a viable method for developing tunable femtosecond lasers.
- This system offers precise control over femtosecond laser pulse durations.
