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Room-temperature diode-bar-pumped Nd:YAG laser at 946 nm
Optics Letters
|October 31, 2009
Summary
Efficient, high-power operation of a diode-bar-pumped Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) laser at 946 nm was achieved. This study demonstrates a ~3 W continuous-wave output with high optical slope efficiency using longitudinal pumping.
Area of Science:
- Laser Physics
- Materials Science
- Optics
Background:
- Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) lasers are crucial for various applications.
- Operating Nd:YAG lasers on quasi-three-level transitions, like 946 nm, presents efficiency challenges.
Purpose of the Study:
- To report efficient, high-power continuous-wave (CW) operation of a diode-bar-pumped Nd:YAG laser.
- To investigate performance at the quasi-three-level transition at 946 nm.
Main Methods:
- Longitudinal pumping of a folded cavity Nd:YAG laser.
- Utilizing a 20-W diode bar as the pump source.
- Employing a two-mirror beam shaper to reformat the pump diode's output.
Main Results:
- Achieved ~3 W of CW output power at room temperature.
- Obtained a 1.5-times diffraction-limited beam quality.
- Demonstrated an optical slope efficiency of approximately 33%.
Conclusions:
- Efficient and high-power operation of a diode-bar-pumped Nd:YAG laser at 946 nm is feasible.
- The employed pumping scheme and beam shaping are effective for this quasi-three-level transition.
- The results indicate potential for compact, high-performance laser systems.
