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Determination of type I phase matching angles and conversion efficiency in KTP
Applied Optics
|November 2, 2010
Summary
This study measured second-harmonic generation conversion efficiency in KTP crystals using a Ti:sapphire laser. Researchers achieved a maximum 4% efficiency, confirming KTP
Area of Science:
- Nonlinear optics
- Solid-state physics
Background:
- Second-harmonic generation (SHG) is crucial for frequency conversion in lasers.
- Potassium Titanyl Phosphate (KTP) is a widely used nonlinear optical material.
Purpose of the Study:
- To measure the conversion efficiency of SHG in KTP.
- To investigate the effect of fundamental wavelength on SHG efficiency.
- To determine the effective nonlinear coefficient (d_eff) of KTP.
Main Methods:
- Utilized a mode-locked picosecond Ti:sapphire laser.
- Employed type I phase matching for SHG in KTP crystals.
- Measured phase matching angles and conversion efficiencies at various fundamental wavelengths.
Main Results:
- Observed phase matching angles agreed with theoretical calculations.
- Achieved a maximum conversion efficiency of 4% at 834 nm fundamental wavelength.
- Determined an effective nonlinear coefficient (d_eff) of 0.32 pm/V, consistent with predictions.
Conclusions:
- KTP is an effective material for second-harmonic generation.
- Experimental results validate theoretical models for SHG in KTP.
- The nonlinear coefficient of KTP is well-characterized for laser applications.
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