Pulse laser apparatus, terahertz measuring apparatus, and terahertz tomographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsToshihiko Ouchi, Takashi Katagiri, Kentaro Furusawa
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Abstract
A pulse laser apparatus includes a laser configured to generate a pulse of a laser beam, a fiber amplifier, and a pulse compressor. The fiber amplifier includes a rare-earth doped fiber that exhibits normal dispersion at a wavelength of the laser beam generated from the laser. The pulse laser apparatus further includes a unit configured to give a loss to energy portions in a wavelength region corresponding to a zero-dispersion wavelength of the rare-earth doped fiber and/or a wavelength region longer than the zero-dispersion wavelength within a wavelength spectrum of the laser beam having been chirped in the fiber amplifier.
Claims15
-17. (canceled)
A pulse laser apparatus comprising:
- a fiber amplifier configured to amplify and chirp a light pulse from a laser;
- and
- a pulse compressor configured to compress a pulse width of the light pulse from the fiber amplifier,
- wherein the fiber amplifier includes a rare-earth doped fiber that exhibits normal dispersion at a center wavelength of a wavelength spectrum of the light pulse from the laser,
- wherein the rare-earth doped fiber chirps the light pulse so that the light pulse has energy portions in a wavelength region longer than a zero-dispersion wavelength of the rare-earth doped fiber, and
- wherein the fiber amplifier is configured to give a loss to the energy portions.
Dependencies are inferred from the claim text.