Spectral broadening and dispersion compensation of mid-infrared femtosecond pulses
説明
We have demonstrated efficient spectral broadening of mid-infrared pulses by use of a GaAs crystal. The spectral bandwidths of the pulses at 5-µm wavelength increased from 540 nm to 2060 nm. The main advantages of this material are its large third-order nonlinearity and its transparency range (1 – 18 µm), which fully covers the molecular fingerprint region. We have also demonstrated that the second-order dispersion compensation with a CaF 2 plate generated the compressed pulses with 3 optical cycles. The demonstrated scheme should work at any wavelength within the materials transparency range, and therefore be useful for spectral broadening of pulses generated from the well-established OPA-DFG system. Arbitrary shaping of the broadband mid-infrared pulses using 4f-pulse shaper would be beneficial for nonlinear vibrational spectroscopy and coherent control experiments.
収録刊行物
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- 2010 IEEE Photinic Society's 23rd Annual Meeting
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2010 IEEE Photinic Society's 23rd Annual Meeting 540-541, 2010-11-01
IEEE