Spectroscopic characterization and laser performance of resonantly diode-pumped Er 3+ -doped disordered NaY(WO 4 ) 2

We report what is believed to be the first resonantly pumped laser operation based on Er3+-doped disordered double tungstate single crystal. Efficient laser operation of an Er3+:NaY(WO4)2 laser at ∼1609.6 nm was demonstrated with the naturally wideband, ∼20 nm, InGaAsP/InP laser diode pumping at ∼1501 nm. Laser wavelength tunability of ∼34 nm was also demonstrated based on disorder-broadened emission features of Er3+:NaY(WO4)2 single crystal.