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Related Experiment Videos

200-mW-average power ultraviolet generation at 0.193 microm in K2Al2B2O7.

Nobuhiro Umemura1, Miwako Ando, Kaori Suzuki

  • 1Faculty of Photonics Science, Chitose Institute of Science and Technology, 758-65 Bibi, Chitose, Hokkaido, Japan.

Applied Optics
|June 5, 2003
PubMed
Summary

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Potassium aluminum borate (K2Al2B2O7) is phase matchable for sum-frequency generation (SFG) at 0.193 micrometers. This material enables efficient generation of deep-ultraviolet light for various laser applications.

Area of Science:

  • Nonlinear Optics
  • Materials Science

Background:

  • Efficient generation of deep-ultraviolet (DUV) light is crucial for applications in laser processing, spectroscopy, and photolithography.
  • Developing new nonlinear optical (NLO) materials with high performance and wide transparency is an ongoing research area.

Purpose of the Study:

  • To investigate the nonlinear optical properties of K2Al2B2O7 for sum-frequency generation (SFG).
  • To determine the phase-matching conditions and performance of K2Al2B2O7 for DUV light generation.
  • To develop Sellmeier and thermo-optic dispersion equations for K2Al2B2O7.

Main Methods:

  • Type-1 SFG experiments were conducted using a Nd:YAG laser and an optical parametric oscillator (OPO).
  • Phase-matching conditions were achieved by mixing fundamental and OPO wavelengths.

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  • Sellmeier equations and thermo-optic dispersion formulas were derived and validated.

    • Main Results:

    • K2Al2B2O7 demonstrated phase matchability for type-1 SFG at 0.193 micrometers.
    • An average output power of 200 mW at 10 kHz was achieved using a 7-mm-long crystal.
    • The derived Sellmeier and thermo-optic equations accurately predict phase-matching and temperature bandwidths.

    Conclusions:

    • K2Al2B2O7 is a promising NLO material for efficient DUV generation via SFG.
    • The material exhibits good performance and its optical properties can be accurately modeled.
    • This research provides valuable data for the application of K2Al2B2O7 in DUV laser systems.