1. Generation of few-cycle multi-millijoule 2.5 μm pulses from a single-stage Cr2+:ZnSe amplifier
- Author
-
Zenghu Chang, Yanchun Yin, Fengjiang Zhuang, Esben Witting Larsen, Yi Wu, and Fangjie Zhou
- Subjects
Chirped pulse amplification ,Multidisciplinary ,Active laser medium ,Materials science ,business.industry ,Amplifier ,Attosecond ,lcsh:R ,Nonlinear optics ,lcsh:Medicine ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Laser ,01 natural sciences ,law.invention ,010309 optics ,law ,0103 physical sciences ,Femtosecond ,Optoelectronics ,High harmonic generation ,lcsh:Q ,0210 nano-technology ,business ,lcsh:Science - Abstract
Lasers capable of generating attosecond X-ray pulses in the water window (282 to 533 eV) through high-order harmonic generation are normally based on inefficient, multi-stage optical parametric amplifiers or optical parametric chirped pulse amplifiers pumped by femtosecond or picosecond lasers. Here we report a very efficient single amplification stage laser based on traditional chirped pulse amplification capable of producing 4 mJ, near-transform limited 44 fs (μm. The ≈90 GW peak power is the highest value ever reached at this wavelength. In order to fully compress the laser pulses our system is built in a nitrogen box. Our system utilizes water cooled chromium doped zinc selenide (Cr2+:ZnSe) as the gain medium and is pumped by a commercial nanosecond holmium doped yttrium-aluminum-garnet (Ho:YAG) laser.
- Published
- 2020