Fiber laser PreciCut H1 outputs continuous light of 1000W in CW mode, and quasi-continuous light of 3000W at peak power, 1000W at average power in QCW mode. PreciCut H1 is designed with oscillator structure, which brings simple structure and low failure rate. And the pulse energy of PreciCut H1 is stable. Combined with good beam quality (M² < 1.2) and anti-high-reflection design, PreciCut H1 works excellently on precision machining of high reflection materials.