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Room-temperature 1.06-0.53-microm second-harmonic generation with MgO:LiNbO(3)
Optics Letters
|September 23, 2009
Summary
High efficiency second-harmonic generation (SHG) was achieved at room temperature using MgO-doped Lithium Niobate (LiNbO3). This crystal shows promising performance compared to KTP and LBO for laser applications.
Area of Science:
- Nonlinear Optics
- Materials Science
Background:
- Second-harmonic generation (SHG) is crucial for frequency conversion in lasers.
- Lithium Niobate (LiNbO3) is a well-established nonlinear optical material.
- Doping LiNbO3 with Magnesium Oxide (MgO) can enhance its nonlinear properties.
Purpose of the Study:
- To investigate room-temperature SHG performance of 7 mol.% MgO-doped LiNbO3.
- To compare MgO:LiNbO3 with other nonlinear crystals like KTP and LBO.
- To determine phase-matching parameters for MgO:LiNbO3.
Main Methods:
- Angle-tuned phase matching was employed for SHG.
- A 12-mm-long MgO:LiNbO3 crystal was used.
- Experimental Sellmeier equations were determined for calculations.
Main Results:
- A 45% SHG conversion efficiency was achieved at room temperature.
- This was obtained with a fundamental peak-power density of 140 MW/cm^2.
- Noncritical phase-matched Type I SHG was identified at 1.053 microm.
Conclusions:
- MgO:LiNbO3 offers high SHG efficiency at room temperature.
- It is a competitive material compared to KTP and LBO.
- It is suitable for use with Nd:YLF lasers operating at 1.053 microm.
