Frequency conversion of neodymium laser radiation by resonant pumping of YAG crystals activated with Tm³⁺and Ho³⁺ions

Laser frequency converter based on a BaYb2F8:Ho3+crystal. Stimulated emission at 2μ.

“…One of the ways of achieving such matching is to use monochromatic laser pumping. Laser frequency converters, which were first investigated by Antipenko et al 2 ' 3 stand out from the other crystal lasers by their intended use-conversion of the stimulated emission energy of an efficient neodymium laser to a different spectral range-as well as by high values of the gain (0.5 cm" 1 ), record specific output energy (10 j/cm 3 ), and small angular divergence close to the diffraction limit. The present paper reports an investigation of the 2-μ emission channel of a laser converter based on a BaYb 2 F 8 crystal activated with Ho 3 * ions (C Ho = 6.5x 10 19 cm' 3 ).…”