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Stabilization of a semiconductor disk laser using an intra-cavity high reflectivity grating
Optics Express
|June 25, 2009
Summary
A High Reflectivity Grating (HRG) stabilizes wavelength and polarization in Semiconductor Disk Lasers. This method enables tunable, single-frequency operation with significant output power.
Area of Science:
- Optics and Photonics
- Semiconductor Lasers
- Laser Engineering
Background:
- Semiconductor Disk Lasers (SDLs) offer high power but often lack wavelength and polarization stability.
- External cavity designs are crucial for controlling laser output characteristics.
Purpose of the Study:
- To investigate the use of a High Reflectivity Grating (HRG) as an intra-cavity element in an SDL.
- To stabilize the emission wavelength and polarization of the laser.
- To achieve tunable, single-frequency operation.
Main Methods:
- Integrating an HRG within the laser cavity of an SDL.
- Characterizing the laser's output power, wavelength stability, polarization, and beam quality.
- Evaluating the tunability of the single-frequency operation.
Main Results:
- Stable operation at 1058nm was achieved.
- Up to 645mW of pump-limited output power was obtained.
- A beam quality factor M(2)~1.4 was measured.
- Tunable single-frequency operation was demonstrated.
Conclusions:
- HRGs are effective intra-cavity elements for stabilizing SDLs.
- This approach enhances laser performance for applications requiring precise wavelength and polarization control.
- The demonstrated technique allows for flexible, tunable, single-frequency laser output.
