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Compact second-harmonic generation laser module with 1 W optical output power at 490 nm
Christian Fiebig1, Alexander Sahm, Mirko Uebernickel
1Ferdinand-Braun-Institut für Höchstfrequenztechnik,Gustav-Kirchhoff-Str.4 12489 Berlin, Germany. Christian.Fiebig@FBH-Berlin.de
Optics Express
|January 7, 2010
Summary
Researchers achieved 1 W of continuous-wave blue light at 490 nm using a compact micro-optical bench. This demonstrates efficient second-harmonic generation for high-power blue laser applications.
Area of Science:
- Optics and Photonics
- Laser Technology
- Materials Science
Background:
- High-power blue laser sources are crucial for various applications.
- Efficient and compact blue laser generation remains a challenge.
Purpose of the Study:
- To demonstrate a compact, high-power continuous-wave blue laser source.
- To achieve efficient second-harmonic generation (SHG) for blue light production.
Main Methods:
- Utilized a periodically poled magnesium oxide-doped lithium niobate (MgO:LiNbO3) bulk crystal.
- Employed single-path second-harmonic generation on a micro-optical bench.
- Pumped the system with a 9.5 W distributed Bragg reflector tapered diode laser at 490 nm.
Main Results:
- Achieved 1 W of continuous-wave blue light output at 490 nm.
- Obtained an optical conversion efficiency of 11%.
- Demonstrated excellent output power stability (<2%) and near diffraction-limited beam quality (M²σ = 1.2 vertical, M²σ = 2 lateral).
Conclusions:
- The micro-optical bench design enables efficient high-power blue light generation.
- Periodically poled MgO:LiNbO3 is a viable material for compact blue laser systems.
- The demonstrated system offers a stable and high-quality blue laser output for potential applications.
