“…Such a compact, robust, and misalignment-free design provides low intracavity losses and high laser efficiency. Continuous wave (CW) Tm,Ho microchip lasers were realized with a number of hosts such as LiYF 4 , YAlO 3 , YVO 4 , and GdVO 4 [8][9][10][11][12]. Recently, we studied potassium lutetium double tungstate, KLuWO 4 2 or KLuW for short, which has proved to be very suitable host for rare earth doping [13].…”