Experimental observation of intermittent chaos in a three-section monolithically integrated semiconductor laser

We experimentally investigate the dynamics of a three-section monolithically integrated semiconductor laser (MISL). The MISL is designed and fabricated by ourselves, which is composed of a distributed feedback (DFB) laser section, a phase (P) section and an amplifier (A) section with lengths of 220 μm, 240 μm, and 320 μm, respectively. Two types of intermittent chaos states named as TC1 and TC2 have been observed. For TC1, the intermittent behavior is characterized by the chaotic state interrupting the stable state. As for TC2, the intermittent behavior is characterized by the chaotic state interrupting the period two state. The evolution route of the dynamical state in the MISL is analyzed.