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We have demonstrated a novel optical-parametric chirped-pulse amplification scheme with diverged pump beam for ultraboradband phase-matching. Over 400nm ultrabroadband amplified pulses was successfully obtained at 1000 nm center wavelength with a gain of 1.2×105.
Femtosecond mid-IR pulses were coupled into a quantum cascade laser. The spectral broadening and far-field profile of the transmitted pulses showed an intensity dependence. n2 was experimentally estimated to be on the order of ∼10−9cm2/W.
All-fiber Bessel-like beam generator achieved optical trapping and displacement control of micron particles. A pair of generators being compatible with lab on a chip system can be good tools for manipulation and analysis of bio-sample.
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