scholarly journals Laser pulse measurement by four wave mixing

2001 ◽  
Vol 29 (Supplement) ◽  
pp. 141-141,147
Author(s):  
Yuusuke Sakabe ◽  
Hidetugu Yoshida ◽  
Shinji Motokosi ◽  
Fuminobu Sato ◽  
Shinichirou Okihara ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Pulse Measurement

scholarly journals Extended search for sub-eV axion-like resonances via four-wave mixing with a quasi-parallel laser collider in a high-quality vacuum system

2020 ◽  
Vol 2020 (7) ◽  
Author(s):  
Akihide Nobuhiro ◽  
Yusuke Hirahara ◽  
Kensuke Homma ◽  
Yuri Kirita ◽  
Takaya Ozaki ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Mass Range ◽  
Four Wave Mixing ◽  
Pulse Power ◽  
Vacuum System ◽  
Mass Relation ◽  
Wave Mixing ◽  
High Quality ◽  
Optical Components ◽  
Background Photon

Abstract Resonance states of axion-like particles were searched for via four-wave mixing by focusing two-color pulsed lasers into a quasi-vacuum. A quasi-parallel collision system that allows probing of the sub-eV mass range was realized by focusing the combined laser fields with an off-axis parabolic mirror. A 0.10 mJ/34 fs Ti:sapphire laser pulse and a 0.14 mJ/9 ns Nd:YAG laser pulse were spatiotemporally synchronized by sharing a common optical axis and focused into the vacuum system. No significant four-wave mixing signal was observed at the vacuum pressure of $3.7 \times 10^{-5}$ Pa, thereby providing upper bounds on the coupling-mass relation by assuming exchanges of scalar and pseudoscalar fields at a 95% confidence level in the mass range below 0.21 eV. For this search, the experimental setup was substantially upgraded so that the optical components were compatible with the requirements of the high-quality vacuum system, hence enabling the pulse power to be increased. With the increased pulse power, a new kind of pressure-dependent background photon emerged in addition to the known atomic four-wave mixing process. This paper shows the pressure dependence of these background photons and how to handle them in the search.

Study of four-wave mixing in the femtosecond laser pulse propagation near the resonance rubidium doublet

2015 ◽  
Vol 9 (4) ◽  
pp. 552-554
Author(s):  
A. A. Preobrazhenskaya ◽  
D. Yu. Preobrazhenskii ◽  
A. A. Pastor ◽  
P. Yu. Serdobintsev
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Pulse Propagation ◽  
Four Wave Mixing ◽  
Wave Mixing
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