Fiber-based pulse stretcher for narrowband terahertz pulse generation with a chirped-pulse beating method

2013 ◽  
Vol 103 (15) ◽  
pp. 151118 ◽  
Author(s):  
Tetsuya Yoshida ◽  
Shohei Kamada ◽  
Shuhei Murata ◽  
Takao Aoki
Keyword(s):  
Pulse Generation ◽  
Terahertz Pulse ◽  
Chirped Pulse

scholarly journals Yb:YAG thin-disk chirped pulse amplification laser system for intense terahertz pulse generation

2015 ◽  
Vol 23 (11) ◽  
pp. 15057 ◽  
Author(s):  
Yoshihiro Ochi ◽  
Keisuke Nagashima ◽  
Momoko Maruyama ◽  
Masaaki Tsubouchi ◽  
Fumiko Yoshida ◽  
...  
Keyword(s):  
Laser System ◽  
Thin Disk ◽  
Pulse Generation ◽  
Terahertz Pulse ◽  
Chirped Pulse ◽  
Pulse Amplification ◽  
Chirped Pulse Amplification

Theoretical exploration of harmonic emission and attosecond pulse generation from H2+ in the presence of terahertz pulse

2016 ◽  
Vol 30 (17) ◽  
pp. 1650226 ◽  
Author(s):  
Hang Liu ◽  
Liqiang Feng
Keyword(s):  
Harmonic Generation ◽  
Vibrational State ◽  
Pulse Generation ◽  
Isotopic Effect ◽  
Time Dependent ◽  
Terahertz Pulse ◽  
Harmonic Extension ◽  
Chirped Pulse ◽  
Attosecond Pulse Generation ◽  
Magnitude Improvement

Harmonic generation spectra from H[Formula: see text] molecule ion driven by the chirped pulse combined with a terahertz (THz) pulse have been theoretically investigated by numerically solving the non-Born–Oppenheimer time-dependent Schrödinger equation (NBO-TDSE). The results show that with the introduction of the chirp, the harmonic cutoff is extended, resulting in a smooth supercontinuum. Further, when the initial vibrational state is prepared as [Formula: see text], and by properly adding a THz controlling pulse, the harmonic yield is enhanced by almost six orders of magnitude compared with the single chirped pulse case. Quantum analyses are shown to explain the harmonic extension and enhancement. Furthermore, through the investigation of the isotopic effect, we find that more intense harmonics are generated in the lighter nucleus. Finally, by properly superposing the harmonics, a series of intense 35 as XUV pulses can be obtained, which are almost six orders of magnitude improvement in comparison with the single chirped pulse case.

Numerical studies of powerful terahertz pulse generation from a super-radiant surface wave oscillator

2009 ◽  
Vol 16 (12) ◽  
pp. 123104 ◽  
Author(s):  
Hai Zhang ◽  
Jianguo Wang ◽  
Changjiang Tong ◽  
Xiaoze Li ◽  
Guangqiang Wang
Keyword(s):  
Surface Wave ◽  
Pulse Generation ◽  
Terahertz Pulse ◽  
Numerical Studies ◽  
Wave Oscillator

Intensity enhancement of attosecond XUV pulse by using asymmetric inhomogeneous mid-infrared down-chirped field

2017 ◽  
Vol 31 (26) ◽  
pp. 1750185 ◽  
Author(s):  
Liqiang Feng ◽  
Wenliang Li ◽  
Hang Liu
Keyword(s):  
Laser Intensity ◽  
Temporal Frequency ◽  
Three Dimensional ◽  
Pulse Generation ◽  
Homogeneous Field ◽  
Inhomogeneous Field ◽  
Plasmonic Enhancement ◽  
Positive Direction ◽  
Chirped Pulse ◽  
Intensity Enhancement

Intensity enhancement of the attosecond pulse generation from the high-order harmonic spectra has been theoretically investigated through solving the three-dimensional time-dependent Schrödinger equation. It is found that with the introduction of the down-chirped pulse, the temporal frequency of the down-chirp region is decreased. As a result, the ionized electrons can receive much more energy during its acceleration in this region, showing the extension of the harmonic cutoff. Moreover, due to the multi-harmonic emission events contribute to the higher harmonics, the intensity of the harmonic cutoff from the down-chirped pulse is 1.5 orders of magnitude higher than those from the chirp-free pulse. Further, by properly introducing the asymmetric inhomogeneous effect, the plasmonic enhancement of the laser intensity in the negative direction is larger than that in the positive direction. As a consequence, the ionized electron from the down-chirp region with the negative amplitude can obtain the additional acceleration, thus leading to the further extension of the harmonic cutoff. Especially when the spatial position of the inhomogeneous field is chosen to be the negative value, due to the improved enhancement of the laser intensity, not only the harmonic cutoff is extended but also the harmonic yield is near-stable, showing a 175 eV supercontinuum with the single short quantum path contribution. Finally, by directly superposing the selected harmonics, three attosecond XUV pulses with the full widths at half maximum of 38, 35 and 36 as can be obtained, which are nearly 1.5 orders of magnitude enhancement compared with the chirp-free homogeneous field case.

scholarly journals Short Terahertz Pulse Generation from a Dispersion Compensated Modelocked Semiconductor Laser (Laser Photonics Rev. 11(4)/2017)

2017 ◽  
Vol 11 (4) ◽  
pp. 1770042 ◽  
Author(s):  
Feihu Wang ◽  
Hanond Nong ◽  
Tobias Fobbe ◽  
Valentino Pistore ◽  
Sarah Houver ◽  
...  
Keyword(s):  
Semiconductor Laser ◽  
Pulse Generation ◽  
Terahertz Pulse
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