Stable and near Fourier-transform-limit 30fs pulse compression with a tiled grating compressor scheme

Area of Science:

• Laser Physics and Photonics
• Ultrafast Optics

Background:

• Meter-sized gratings are a bottleneck for developing 10PW femtosecond ultra-intense lasers.
• Traditional grating tiling methods, used in picosecond lasers, are unreliable and complex for femtosecond applications due to bandwidth and sensitivity requirements.

Purpose of the Study:

• To demonstrate a feasible solution for overcoming grating size limitations in high-power femtosecond laser development.
• To achieve high-quality pulse compression using a novel grating tiling technique.

Main Methods:

• Demonstrated an experiment utilizing an object-image-grating self-tiling compressor.
• Compressed a nanosecond deep-chirped pulse centered at 800nm.

Main Results:

• Achieved a compressed pulse duration of approximately 30 femtoseconds (fs).
• This represents the shortest pulse compressed by a tiled grating compressor to date.
• Both the compressed pulse and focal spot exhibited stability and approached theoretical limits.

Conclusions:

• The object-image-grating self-tiling compressor offers a reliable and effective solution to grating size limitations.
• This method is suitable for current and future femtosecond 10PW Ti:sapphire or OPCPA laser projects.
• The technique paves the way for advancements in ultra-intense laser development.