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Efficient second harmonic generation in beta-barium borate by a diffraction-limited copper vapor laser
Applied Optics
|August 21, 2010
Summary
Researchers achieved efficient second harmonic generation using a copper vapor laser and beta-barium borate crystal. This method doubled previous conversion efficiencies for this laser-induced nonlinear optical process.
Area of Science:
- Optics and Photonics
- Nonlinear Optics
- Laser Physics
Background:
- Copper vapor lasers (CVLs) are sources of visible light.
- Second harmonic generation (SHG) is a key nonlinear optical process.
- Beta-barium borate (BBO) is a widely used nonlinear optical crystal.
Purpose of the Study:
- To investigate second harmonic generation (SHG) using a copper vapor laser (CVL).
- To evaluate the efficiency of SHG in a beta-barium borate (BBO) crystal.
- To improve upon previously reported SHG conversion efficiencies.
Main Methods:
- Utilized a diffraction-limited beam from a CVL with a self-filtering unstable resonator.
- Employed a nonlinear crystal of beta-barium borate (BBO) for SHG.
- Measured average and peak power conversion efficiencies at 511 nm.
Main Results:
- Achieved average power conversion efficiency of approximately 20%.
- Achieved peak power conversion efficiency of approximately 30%.
- Improved upon previously reported results by a factor of 2.
Conclusions:
- Demonstrated efficient SHG from a moderate-power CVL.
- Highlighted the effectiveness of BBO crystals for CVL-based SHG.
- Established a new benchmark for SHG efficiency with CVLs.
