11 February 2011 Holographic spatiotemporal lens
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Abstract
We propose a holographic spatiotemporal lens to improve spatial resolution of two-photon excitation spot as a new focusing technique of femtosecond laser pulse. Femtosecond laser pulses dispersed by a diffraction grating are irradiated to a chirped diffractive lens displayed on a spatial light modulator. The chirped diffractive lens has a spatially chirp of focal length for a design for its corresponding wavelength. The shortest pulse was experimentally obtained only at the focal plane. The pulse duration was also supported with a computer simulation.
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Kouhei Kimura, Satoshi Hasegawa, Yoshio Hayasaki, "Holographic spatiotemporal lens", Proc. SPIE 7925, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XI, 792508 (11 February 2011); doi: 10.1117/12.874329; https://doi.org/10.1117/12.874329
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