Fig. 1. Schematic of 150 kW industrial ultra-high-power fiber laser

Fig. 2. Measured spectrum of 150 kW high power fiber laser (left) and beam quality test (right)

Fig. 3. Schematic diagram of ultra-high power laser measurement system based on the principle of light pressure

Fig. 4. Comparison of measured power between laser measurement system based on the principle of light pressure and commercial calorimetric power meter (insert: result of 150 kW laser measurement)