Over Ten-millijoule Eye-safe Laser Generation by Extra-cavity Optical Parametric Oscillator Driven with a Diode-pumped Nd:YAG/Cr4+:YAG Q-Switched Laser Topics: High Intensity Lasers and High Field Phenomena; Nonlinear Optics In Proceedings of the 3rd International Conference on Photonics, Optics and Laser Technology - Volume 2: PHOTOPTICS, 172-176, 2015 , Berlin, Germany