title: Multiwatt continuous wave Nd:KGW laser with hot-band diode pumping.
abstract: We have demonstrated what we believe is the first continuous wave neodymium-doped potassium gadolinium tungstate crystal (Nd:KGW) laser with hot-band diode pumping at ∼910  nm. This pumping wavelength reduced the quantum defect by >46% as compared to conventional ∼810  nm pumping and resulted in significantly lower thermal lensing. The laser produced 2.9 W of average output power at 1067 nm in a diffraction-limited beam for an absorbed pump power of 8.3 W. The slope efficiency and optical-to-optical efficiency were found to be 43% and 35%, respectively. Significant reduction of quantum defect offered by this pumping wavelength and availability of suitable high-power laser diodes opens up an attractive way to further power and efficiency scaling of Nd:KGW lasers.
authors: Rubel Chandra
authors: RC
authors: Talukder
authors: Md Zubaer
authors: MZ
authors: Eibna Halim
authors: Tanant
authors: T
authors: Waritanant
authors: Arkady
authors: A
authors: Major