Abstract
Compact visible lasers, especially for up-conversion of IR-diode-laser wavelengths, are needed in a wide variety of applications. It is known that strong two-photon absorption (TPA) in optical waveguides poses a fundamental limitation to all-optical switching.1 However, this same property is desirable in a new class of photonic devices called multiphoton-pumped upconverted lasers (MU-LASER's). Materials with, a high multiphoton absorption coefficient but with low linear losses (absorption, scattering), that are capable of fluorescing from levels that can potentially lase are useful for the fabrication of upconversion waveguide lasers, especially for upeonverting IR-diode-laser wavelengths to the visible spectrum.
© 1993 Optical Society of America
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