Picosecond laser system continuously tunable in the 0.6-4-microm range.

Area of Science:

• Optics and Photonics
• Laser Physics
• Nonlinear Optics

Background:

• Picosecond laser systems are crucial for various scientific and industrial applications requiring precise temporal resolution.
• Existing tunable laser systems often face limitations in terms of tuning range, pulse duration flexibility, or simultaneous mode operation.

Purpose of the Study:

• To develop a continuously tunable picosecond laser system with enhanced operational flexibility.
• To achieve a broad tuning range (0.6-4 micrometers) in both continuous-wave (cw) and pulsed modes.
• To enable simultaneous and synchronized operation of both cw and pulsed modes.

Main Methods:

• Development of a laser system based on a mode-locked high-power Neodymium-doped Yttrium Lithium Fluoride (Nd:YLF) laser.
• Synchronous pumping of a dye laser and seeding of a Nd:YLF regenerative amplifier.
• Utilizing frequency mixing and parametric generation/amplification in Potassium Titanyl Phosphate (KTiOPO4) crystals for broad tunability.

Main Results:

• A continuously tunable picosecond laser system operating in both cw (100 MHz) and pulsed (10 Hz) modes was successfully developed.
• The system exhibits a consistent tuning range of approximately 0.6-4 micrometers across both operational modes.
• Flexible pulse durations (5 ps and 50 ps) are available, with synchronized simultaneous operation of cw and pulsed modes.
• Average output power is in the milliwatt range for both repetition rates.

Conclusions:

• The developed laser system offers unprecedented flexibility and performance for tunable picosecond light generation.
• The synchronized dual-mode operation (cw and pulsed) broadens the applicability of the system.
• This versatile laser platform is suitable for advanced research in spectroscopy, nonlinear optics, and materials processing.