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Hao Teng - IEEE Xplore Author Profile

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We demonstrate the first dual-pass pre-chirp managed amplification in a rod-type Yb-fiber that amplifies 23-mW broadband pulses to 101.5-W with 36.5-dB gain. After compression, the system delivers 2-μJ, 67-fs pulses.Show More
We demonstrate an energetic ultrafast laser source that simultaneously provides three-color pulses tunable from 925 nm to 1150 nm with energy up to 75 nJ. The repetition-rate can be tuned from 1 to 20 MHz.Show More
We demonstrate a 1-MHz ultrafast fiber-optic source that produces ∼100-fs pulses tunable from 940 nm to 1250 nm with up to 33-nJ pulse energy. Such a source is ideal for driving multi-photon microscopy.Show More
We demonstrate an Yb-fiber based pre-chirp managed amplification system that amplifies circularly polarized pulses. Using chirped mirrors as the highly efficient (98%) compressor, the system emits 50-MHz, 42-fs pulses with 83- W average power.e 2019 The Author(s)Show More
We reported the third harmonic generation using a K3B6O10Cl crystal for the first time. Output power of 5.9 mW was obtained at the wavelength of 263-nm, corresponding to conversion efficiency of 4.5% to second harmonic.Show More
We explored dispersion management of a NPE mode-locked Yb-doped all fiber oscillator by a tapered fiber, the compressed pulse duration of 116fs, power of 36mW, spectrum is widened to near 20nm.Show More
A mode-locked all-normal-dispersion rod-fiber laser with large core diameter was demonstrated. Output power of 16 W with 270 fs pulse duration is generated. To best knowledge this is the first laser operation with 85 μm core fiber.Show More
We demonstrated a high contrast 1053 nm femtosecond laser by exchanging the signal and idler in two stages non-collinear optical-parametric amplifier, 60 μI idler with measurement-limited contrast of 2.3×1011 was obtained within scale of sub-10 ps.Show More
Tunable Ti:sapphire laser amplifier covered from 765 nm to 835 nm was demonstrated by using a 1-kHz single longitudinal mode laser as seed. Maximum output power of 6.9 W with <200 MHz linewidth was obtained.Show More
We demonstrated a high contrast 1053 nm femtosecond laser by exchanging the signal and idler in two stages non-collinear optical-parametric amplifier, 60 uJ idler with measurement-limited contrast of 2.3×10 was obtained within sub-10 ps.Show More
We generated laser power of 1.16PW from a Ti:sapphire laser facility by using a combined scheme of doubled chirped-pulse amplifier (DCPA) and non-collinear optical parametrical amplifier (NOPA). Laser energy up to 32.3J was obtained with the pulse duration was 27.9fs. By clean high-energy seeding pulse injection from the NOPA stage, contrast ratio of the main amplified laser pulse was improved to ...Show More
Arrow-like pattern is observed in high order harmonic spectrum driven by 4fs laser. Individual electron quantum trajectories from different half cycles, including long and short trajectories, can be clearly recognized spatially.Show More
Isolated attosecond pulse is generated from neon gas driven by CEP stabilized sub-5fs Ti:Sapphire laser pulses at repetition rate of 1 kHz. The streaking retrieval shown the pulse duration is 173as with photon energy of 82eV.Show More
Peak Power above 1 PW was obtained from a femtosecond Ti:sapphire laser facility based on DCPA technique. With optical parametric amplification clean the seeding pulse, we measured contrast ratio up to 1010 in picosecond range.Show More
Down-conversion from blue to near infrared (NIR) has been demonstrated in $\hbox{Tm}^{3+}\hbox{–}{\hbox {Yb}}^{3+}$ codoped $\hbox{Y}_{2}\hbox{O}_{3}$ transparent ceramics. Upon the 464-nm excitation, the energy transfer (ET) mechanisms consisted of the $\hbox{Tm}^{3+}:{^{1}\hbox{G}}_{4}\rightarrow 2{\hbox {Yb}}^{3+}:{^{2}\hbox{F}}_{5/2}$ cooperative down-conversion and the phonon assisted $\hbox...Show More
Coherent extreme-ultraviolet (XUV) radiation was studied by interaction of Carrier-Envelope (CE) phase stabilized high energy sub-5-fs infrared (800 nm) laser pulses with neon gas at a repetition rate of 1 kHz. The results show generation of isolated attosecond XUV pulses.Show More
Ultrabroaden spectrum covered from 600 nm to 1100 nm was generated from a new designed sub-10fs Ti:sapphire laser at 160 MHz repetition rates. By difference frequency the spectrum with PPLN crystal, we measured and locked the carrier-envelope phase.Show More
We demonstrated a new monolithic scheme for measuring carrier-envelope phase base on a home-made Ti:sapphire laser at repetition rate of 180 MHz, signal to ratio in excess of 50 dB was obtained by using a MgO:PPLN crystal which was designed for difference frequency generation between 700 nm and 900 nm.Show More
An efficient chirped-pulse regenerative amplifier at 1kHz repetition rate was researched with ring-cavity configuration, slope efficiency up to 40% and output energy-jitter less than 1.25% were demonstrated. Amplified pulse energy of 2.4mJ was obtained.Show More
Interaction of P-polarized femtosecond laser pulses at 8/spl times/10/sup 15/ W/cm/sup 2/ with metallic and dielectric targets are studied. Smaller laser absorption and fewer emitted electrons and lower hot electron temperature in dielectric target than that in metallic targets are found.Show More
Outgoing hot electrons collimated in the polarization direction was observed for the s-polarized laser irradiation, whereas for the p-polarized irradiation, very directional emission of outgoing hot electrons was found close to the normal direction of the target.Show More