Tunable subpicosecond infrared pulse generation to 4 microm.
High-power, subpicosecond infrared pulses have been generated over the wavelength region of 1.7-4.0 microm. The technique uses difference-frequency generation in a LiNbO(3) crystal. The subpicosecond output of an amplified colliding-pulse mode-locked (CPM) ring dye laser provides the two frequencies, one being the CPM fundamental, the other a portion of the subpicosecond continuum generated in an ethanol cell. Pulse width, power, and spectral characteristics are discussed.
Moore
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Schmidt
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