The Dynamics of the Polarization State in Microchip Nd:YVO4 Laser System

For the properties of crystal and simple system structure, laser diode pumped microchip Nd:YVO4 laser have wide applications. The study of the dynamics of instability of Nd:YVO4 laser system is one of more important issue, recently. In this study, We construct a microchip Nd:YVO4 laser system with polarized optical feedback to observe the influence of polarization state. We select linear, ellipse, and circular as the polarization state of pumping beam and optical feedback beam. When the system is solitary pumped, we demonstrate that the Nd:YVO4 laser system is polarization-dependent fluctuations, and that the pumping efficiency of linearly polarization state is the best. As the system experience the optical feedback, the results shows that the linear polarized feedback is more sensitive in the laser system.