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Methods of passive and active mode locking using intracavity optical frequency mixing
Optics Letters
|September 15, 2009
Summary
This study extends mode-locking techniques to sum- and difference-frequency generation, enabling simultaneous passive mode-locking of multiple lasers and active mode-locking via pulse train injection.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Mode-locking is crucial for generating ultrashort laser pulses.
- Intracavity second-harmonic generation is a known technique for mode-locking.
Purpose of the Study:
- To extend mode-locking techniques beyond second-harmonic generation.
- To enable simultaneous passive mode-locking of multiple lasers.
- To achieve active mode-locking through external pulse injection.
Main Methods:
- Extension of intracavity second-harmonic generation principles.
- Application to sum-frequency generation (SFG).
- Application to difference-frequency generation (DFG).
Main Results:
- Demonstrated simultaneous passive mode-locking of two different lasers in a combined cavity.
- Showcased active mode-locking of a laser by injecting a pulse train from another mode-locked laser.
Conclusions:
- The extended mode-locking technique is versatile for multi-laser systems.
- This method offers new possibilities for laser synchronization and pulse generation.
