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Tunable picosecond mid-infrared pulses generated by opticalparametric generation/amplification in MgO:LiNbO(3)
Optics Letters
|October 31, 2009
Summary
Researchers developed a tunable mid-infrared laser source using optical parametric generation and amplification. This system achieves 2-3 picosecond pulses with high energy conversion efficiency, advancing tunable laser technology.
Area of Science:
- Physics
- Laser Science
- Nonlinear Optics
Background:
- Picosecond lasers are crucial for precise material processing and spectroscopy.
- Optical parametric generation and amplification (OPG/OPA) offer tunable wavelength generation.
- Magnesium oxide-doped lithium niobate (MgO:LiNbO3) is a key nonlinear optical material.
Purpose of the Study:
- To develop a tunable mid-infrared picosecond laser source.
- To investigate optical parametric generation/amplification in MgO:LiNbO3 crystals.
- To achieve high pulse energy and conversion efficiency in the mid-infrared spectrum.
Main Methods:
- Utilized a regeneratively amplified picosecond Ti:sapphire laser as the pump source.
- Employed 7% MgO:LiNbO3 crystals for optical parametric generation/amplification.
- Applied angle tuning to achieve tunability in the mid-infrared region.
Main Results:
- Generated mid-infrared pulses tunable between 2.6 and 4.5 micrometers.
- Achieved pulse durations of 2-3 picoseconds.
- Obtained a maximum pulse energy of 17 microJ at 3.3 micrometers.
- Demonstrated a pump-to-idler photon conversion efficiency of 18% in the amplification stage.
Conclusions:
- The developed system provides a highly tunable and efficient source of mid-infrared picosecond pulses.
- MgO:LiNbO3 is effective for OPG/OPA in the mid-infrared, enabling high-energy pulse generation.
- This research advances capabilities in mid-infrared spectroscopy and nonlinear optics applications.
