Related Experiment Video
Updated: Jan 8, 2026
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
14.9K
3.87 W nanosecond mid-infrared vortex generation from a PPLN optical parametric oscillator.
Optics Express
|December 19, 2025
Summary
Researchers developed a tunable mid-infrared vortex laser using an optical parametric oscillator (OPO). This laser achieves record vortex power beyond 3 µm, offering a stable source for spectroscopy and imaging applications.
Area of Science:
- Physics
- Optics
- Laser Technology
Background:
- Mid-infrared (MIR) lasers are crucial for various applications.
- Generating vortex beams with orbital angular momentum (OAM) in the MIR is challenging.
- Optical parametric oscillators (OPOs) offer tunability but require efficient OAM transfer.
Purpose of the Study:
- To demonstrate a high-power, wavelength-tunable nanosecond MIR vortex laser.
- To achieve efficient orbital angular momentum transfer in a singly resonant OPO.
- To provide a stable and practical MIR vortex source for advanced applications.
Main Methods:
- Utilized a singly resonant optical parametric oscillator (OPO) system.
- Employed a MgO:PPLN crystal pumped by a first-order vortex beam at 1064 nm.
- Tuned the idler wavelength by varying the crystal temperature from 3142 to 3442 nm.
Main Results:
- Achieved efficient OAM transfer from pump to idler beam.
- Demonstrated wavelength tunability of the idler from 3142 to 3442 nm.
- Obtained a record vortex output power of 3.87 W at 3442 nm with 0.84% RMS fluctuation over one hour.
Conclusions:
- The developed OPO is the highest reported vortex power source beyond 3 µm among oxide-based OPOs.
- This laser provides a stable and practical solution for MIR applications.
- The technology enables advancements in spectroscopy, imaging, and material processing.
