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Multiphoton Microscopy and Microspherical Laser
The Review of Laser Engineering
We introduce upconversion lasing of a rare-earth ion-doped fluorozirconate glass microsphere in which tensof-micrometer-sized, genuinely spherical glass particles are produced by a melting method and pumped by a focused near-infrared laser beam. Three-photon-excited emission can be observed in the blue and red wavelength regions at room temperature, and their pumping-power dependences indicate the lasing operation. We also discuss the application of the microspherical upconversion laser as adoi:10.2184/lsj.27.823 fatcat:jjnukxxnlbchxfk2aksqvupb24