Browsing by Author "Zhao, Baozhen"

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Sub-15fs ultraviolet pulses generated by achromatic phase-matching sum-frequency mixing
(2009-09-28)
Zhao, Baozhen
;
Jiang, Yongliang
;
Sueda, Keiich
;
Miyanaga, Noriaki
;
Kobayashi, Takayoshi
A broadband ultraviolet pulse with a spectral width of 44 nm was generated by achromatic sum-frequency mixing of an 805-nm pulse and ultrabroadband visible pulse. Angular dispersion was introduced to achieve broadband phase matching by a prism pair. The UV pulse was compressed to 13.2 fs with another prism pair, with energy of 600 nJ. (C) 2009 Optical Society of America
Ultrabroadband noncollinear optical parametric amplification with LBO crystal
(2008-11-10)
Zhao, Baozhen
;
Jiang, Yongliang
;
Sueda, Keiich
;
Miyanaga, Noriaki
;
Kobayashi, Takayoshi
Ultrabroadband visible noncollinear optical parametric amplification (NOPA) was achieved in an LBO crystal, with a continuum seed pulse generated from a sapphire plate. The spectral bandwidth of the amplified visible pulse was about 200 nm, which can support sub-5 fs pulse amplification. An amplified output of 0.21 uJ with an average gain of about 210 was achieved. This provides, to the best of our knowledge, the first-time demonstration of such broadband amplification with a biaxial nonlinear optical crystal. Both the simulation and experimental results indicate that the LBO has a great potential as nonlinear medium in power amplifier for TW to PW noncollinear optical parametric chirped pulse amplification (NOPCPA) systems. (C) 2008 Optical Society of America