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Engineering

Near Infrared 35 fs Laser Microscope Enables Two-, Three-, and Four-Photon Fluorescence Imaging


Fig.1. Multiphoton (forth order) fluorescence from an anthracene microcrystal.
Fig.2. Transmitting (top) and multiphoton fluorescence (bottom) images of a part of Zygnema in water. Scale bar is 5 μm in length.
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