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UV second harmonic generation at 266 nm in He+ implanted beta-BaB2O4 optical waveguides
R Degl'Innocenti1, A Majkic, F Sulser
1Nonlinear Optics Laboratory, Institute of Quantum Electronics, ETH Zürich, Zürich, Switzerland. nlo@phys.ethz.ch
Optics Express
|July 24, 2008
Summary
Researchers achieved deep ultraviolet (UV) light generation using beta-barium borate (BBO) waveguides. This advancement in nonlinear optics produced 0.32 mW of UV light at 266 nm.
Area of Science:
- Nonlinear optics
- Solid-state physics
- Materials science
Background:
- Second harmonic generation (SHG) is crucial for generating shorter wavelengths.
- Beta-barium borate (BBO) is a well-known nonlinear optical crystal.
- Integrated optical devices offer enhanced light manipulation.
Purpose of the Study:
- To demonstrate efficient second harmonic generation of deep UV light in BBO waveguides.
- To investigate the fabrication and properties of optical channel waveguides in BBO.
- To assess the performance of BBO waveguides for UV light generation.
Main Methods:
- Fabrication of BBO optical channel waveguides using He(+) ion implantation, lithographic masking, and ion etching.
- Pumping the waveguides with a frequency-doubled continuous-wave Nd:YAG laser.
- Characterization of linear and nonlinear optical properties and power handling capabilities.
Main Results:
- Achieved an output power of 0.32 mW at 266 nm (deep UV).
- Utilized an internal pump power of 670 mW.
- Presented detailed optical properties and power handling of the fabricated BBO waveguides.
Conclusions:
- BBO waveguides are effective for generating deep UV light via second harmonic generation.
- The fabrication method yields functional optical channel waveguides in BBO.
- These results highlight the potential of integrated BBO devices for UV light applications.
