title: Quasi-two-level Yb:KYW laser with a volume Bragg grating.
abstract: Using a volume Bragg grating as input coupler, we demonstrate an Yb:KYW laser with a very small quantum defect (1.6%) and an output power of 3.6 W. The laser was longitudinally diode-pumped at 982 nm and the laser wavelength was determined by the grating to 998 nm, with a laser bandwidth of 10 GHz (33 pm). Due to the low quantum defect, the laser should be readily scalable to 20 W or more without critical thermal effects.
authors: Jonas E
authors: JE
authors: Hellström
authors: Björn
authors: B
authors: Jacobsson
authors: Valdas
authors: V
authors: Pasiskevicius
authors: Fredrik
authors: F
authors: Laurell