All-solid-state 5-kHz 0.2-TW Ti:sapphire laser system

Area of Science:

• Laser Physics
• Optics and Photonics
• Materials Science

Background:

• High-power ultrashort laser systems are crucial for scientific research and industrial applications.
• Thermal lensing in titanium-sapphire (Ti:sapphire) crystals limits average power in high-repetition-rate systems.
• Developing all-solid-state ultrashort laser sources with high average power remains a significant challenge.

Purpose of the Study:

• To develop an all-solid-state Ti:sapphire laser system capable of producing high-energy, ultrashort pulses.
• To achieve record-breaking average power for ultrashort laser sources.
• To mitigate thermal lensing effects in high-power Ti:sapphire laser operation.

Main Methods:

• Utilized a Ti:sapphire crystal as the gain medium.
• Implemented a stable quasi-cavity design with two concave mirrors.
• Operated the laser system at a repetition rate of 5 kHz.

Main Results:

• Developed an all-solid-state 5-kHz Ti:sapphire laser system.
• Generated pulses with a duration of 22 femtoseconds and a peak power of 0.2 terawatts.
• Achieved a record average power of 22.2 watts, the highest reported for ultrashort laser sources.
• Successfully controlled thermal lensing using the quasi-cavity design.

Conclusions:

• The developed Ti:sapphire laser system demonstrates a new benchmark in average power for ultrashort laser sources.
• The stable quasi-cavity design effectively manages thermal lensing, enabling high-power operation.
• This advancement paves the way for new applications in fields requiring high-intensity, ultrashort laser pulses.