Fig. 6From: Anomalous Mode Transitions in High Power Distributed Bragg Reflector Quantum Cascade Lasersa The red curve is the CW power–current–voltage (P–I–V) curve of DBR laser, the black curve is CW power–current–voltage (P–I–V) curve of the Fabry-Perot (FP) resonator cavity. b The simulated optical field distribution of DBR, FP and DFB lasers with the same cavity length of 6 mmBack to article page