131 W 220 fs fiber laser system.

Area of Science:

• Optics and Photonics
• Laser Physics
• Materials Science

Background:

• High-power ultrashort pulsed lasers are crucial for scientific research and industrial applications.
• Photonic crystal fibers offer unique properties for laser development.
• Ytterbium-doped gain media are widely used for their efficient operation in the near-infrared spectrum.

Purpose of the Study:

• To develop a high-average-power chirped-pulse amplification system.
• To investigate the performance of ytterbium-doped photonic crystal fiber for ultrafast laser applications.
• To achieve ultrashort pulse generation with excellent beam quality.

Main Methods:

• Utilized an ytterbium-doped photonic crystal fiber as the gain medium.
• Implemented a chirped-pulse amplification (CPA) technique.
• Characterized the output laser parameters including average power, pulse duration, wavelength, and beam quality.

Main Results:

• Achieved 131 W of average power.
• Generated 220 fs (femtosecond) duration pulses.
• Operated at a 1040 nm center wavelength with a diffraction-limited beam.
• Reached a pulse energy of 1.8 microJ (microjoules) and a peak power of 8.2 MW (megawatts) at a 73 MHz repetition rate.

Conclusions:

• The ytterbium-doped photonic crystal fiber CPA system demonstrates a powerful and efficient platform for ultrafast laser applications.
• The achieved performance metrics highlight the potential for further advancements in high-power ultrashort pulse generation.
• This technology can benefit fields requiring high-intensity laser pulses, such as materials processing and nonlinear optics.