High average power nonlinear compression to 4  GW, sub-50  fs pulses at 2  μm wavelength.

The combination of high-repetition-rate ultrafast thulium-doped fiber laser systems and gas-based nonlinear pulse compression in waveguides offers promising opportunities for the development of high-performance few-cycle laser sources at 2 μm wavelength. In this Letter, we report on a nonlinear pulse compression stage delivering 252 μJ, sub-50 fs-pulses at 15.4 W of average power. This performance level was enabled by actively mitigating ultrashort pulse propagation effects induced by the presence of water vapor absorptions.

[1]  P. Corkum,et al.  Sub-millijoule CEP stable 1.6 cycle laser pulses at 1.8 μm , 2011, CLEO: 2011 - Laser Science to Photonic Applications.

[2]  J. Biegert,et al.  High-flux table-top soft x-ray source driven by sub-2-cycle, CEP stable, 1.85-μm 1-kHz pulses for carbon K-edge spectroscopy. , 2014, Optics letters.

[3]  Valentina Shumakova,et al.  Subterawatt few-cycle mid-infrared pulses from a single filament , 2016 .

[4]  Jan Hald,et al.  Dynamics of gas flow in hollow core photonic bandgap fibers. , 2008, Applied optics.

[5]  Tino Eidam,et al.  Energetic sub-2-cycle laser with 216  W average power. , 2016, Optics letters.

[6]  G. J. Stein,et al.  Water-window soft x-ray high-harmonic generation up to the nitrogen K-edge driven by a kHz, 2.1 μm OPCPA source , 2016 .

[7]  Cesar Jauregui,et al.  Impact of atmospheric molecular absorption on the temporal and spatial evolution of ultra-short optical pulses. , 2015, Optics express.

[8]  Zach DeVito,et al.  Opt , 2017 .

[9]  K. Osvay,et al.  Dispersion measurement of inert gases and gas mixtures at 800 nm. , 2008, Applied optics.

[10]  F. Stutzki,et al.  Thulium-doped fiber chirped-pulse amplification system with 2 GW of peak power. , 2016, Optics letters.

[11]  M. Murnane,et al.  Bright Coherent Ultrahigh Harmonics in the keV X-ray Regime from Mid-Infrared Femtosecond Lasers , 2012, Science.

[12]  Jens Limpert,et al.  1 MHz repetition rate hollow fiber pulse compression to sub-100-fs duration at 100 W average power. , 2011, Optics letters.

[13]  F. Kärtner,et al.  Multi-mJ, kHz, 2.1 μm optical parametric chirped-pulse amplifier and high-flux soft x-ray high-harmonic generation. , 2014, Optics letters.

[14]  J. Miao,et al.  Coherent X-Ray Diffraction Imaging , 2012, IEEE Journal of Selected Topics in Quantum Electronics.

[15]  J. Tate,et al.  Scaling of wave-packet dynamics in an intense midinfrared field. , 2007, Physical review letters.

[16]  O. Svelto,et al.  Generation of high-energy 10-fs pulses by a new pulse compression technique , 1996, Summaries of papers presented at the Conference on Lasers and Electro-Optics.

[17]  Cesar Jauregui,et al.  152 W average power Tm-doped fiber CPA system. , 2014, Optics letters.

[18]  Jens Limpert,et al.  High-average-power 2 μm few-cycle optical parametric chirped pulse amplifier at 100 kHz repetition rate. , 2015, Optics letters.

[19]  P. Colosimo,et al.  Strong-field photoionization revisited , 2009 .

[20]  S. Zahedpour,et al.  Measurement of the nonlinear refractive index of air constituents at mid-infrared wavelengths. , 2015, Optics letters.