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Stabilization of intracavity frequency-doubled lasers with type I phase matching
C Czeranowsky1, V Baev, G Huber
1Institut für Laser-Physik, Universität Hamburg, Jungiusstrasse 9a, 20355 Hamburg, Germany. czeranowsky@physnet.uni-hamburg.de
Optics Letters
|November 1, 2003
Summary
We developed a new method to stabilize the power of intracavity frequency-doubled lasers. This technique reduces output power fluctuations by optimizing the placement of the gain medium and nonlinear crystal within the laser cavity.
Area of Science:
- Laser physics
- Nonlinear optics
Background:
- Intracavity frequency-doubled lasers often exhibit power fluctuations.
- These fluctuations stem from the coupling of longitudinal laser modes within the nonlinear crystal.
Purpose of the Study:
- To introduce a novel method for stabilizing the output power of intracavity frequency-doubled multimode lasers.
- To mitigate power fluctuations caused by longitudinal mode coupling.
Main Methods:
- Utilizing type I phase matching in the nonlinear crystal.
- Strategically positioning the gain medium and nonlinear crystal within the laser cavity.
- Minimizing nonlinear coupling between different longitudinal laser modes.
Main Results:
- Successfully stabilized the output power of the laser system.
- Significantly reduced power fluctuations previously observed in such laser configurations.
Conclusions:
- The proposed method effectively stabilizes laser power by controlling mode coupling.
- Optimized placement of components is crucial for stable laser operation in frequency-doubled systems.