Optical second harmonic generation properties of BiB3O6.

Area of Science:

• Nonlinear optics
• Materials science
• Solid-state physics

Background:

• Second harmonic generation (SHG) is crucial for frequency conversion.
• Developing new nonlinear optical materials is essential for advanced laser technologies.
• Bismuth borate (BiB3O6) is a novel material with potential for SHG applications.

Purpose of the Study:

• To investigate the optical properties of BiB3O6 for SHG.
• To determine phase-matching conditions and nonlinear coefficients.
• To evaluate BiB3O6 performance for femtosecond pulse generation.

Main Methods:

• Theoretical calculations of phase-matching, nonlinear coefficients, and dispersion.
• Experimental SHG measurements using femtosecond pulses.
• Comparison with established nonlinear materials like beta-BaB2O4.

Main Results:

• Detailed optical properties and phase-matching characteristics of BiB3O6 were determined.
• Efficient SHG into the blue (375-435 nm) was achieved with high average power (830 mW) and >50% conversion efficiency.
• Second harmonic pulse durations of 220 fs were obtained, showing excellent agreement between theory and experiment.

Conclusions:

• BiB3O6 exhibits excellent performance for SHG of femtosecond pulses.
• The material offers improved efficiency and power handling compared to beta-BaB2O4.
• BiB3O6 is a promising material for blue light generation in laser systems.