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High-power femtosecond cylindrical vector beam optical parametric oscillator
Optics Express
|December 28, 2019
Summary
We demonstrate high-power femtosecond cylindrical vector beams (CVB) using a novel optical parametric oscillator (OPO). This tunable OPO system offers flexible control and a wide tuning range for advanced optical applications.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Cylindrical vector beams (CVB) possess unique polarization properties crucial for advanced optical applications.
- Generating high-power, tunable femtosecond CVBs remains a challenge in laser physics.
Purpose of the Study:
- To develop a high-power femtosecond optical parametric oscillator (OPO) capable of generating tunable cylindrical vector beams (CVB).
- To investigate intracavity polarization modulation techniques for CVB generation.
Main Methods:
- Utilized a Gaussian-pumped optical parametric oscillator (OPO).
- Incorporated a half waveplate and a vortex half-wave plate (m=1) for intracavity polarization modulation.
- Achieved wavelength tuning from 1405 to 1601 nm with pulse durations around 150 fs.
Main Results:
- Successfully generated broadband femtosecond CVB signals with radial and azimuthal polarization.
- Obtained a maximum average output power of 614 mW at 1505 nm.
- Demonstrated the scalability to generate higher-order CVBs by altering the vortex half-wave plate.
Conclusions:
- The developed OPO configuration provides a practical and flexible method for generating high-power, tunable femtosecond CVBs.
- The system's wide tuning range and scalability make it suitable for applications in super-resolution imaging, optical communication, and quantum correlations.
