Abstract
A new crystalline medium for 1.5 μm Yb-Er lasers is proposed: GdCa4O(BO3)3 (GdCOB). Its melting point allows crystal growth using platinum instead of iridium crucibles. Spectroscopic and laser tests of the new material are described. A maximum CW output power of 80 mW was achieved in a monolithic microchip cavity under laser diode pumping.
© 2004 Optical Society of America
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