Frequency Stabilization of an Adaptive Self-phase-conjugated Passively Q-switched Laser using Volume Bragg Grating on the Photo-thermo-refractive Glass Topics: Optical Materials and Devices; Photorefractive Effects, Materials and Devices In Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology - PHOTOPTICS, 323-327, 2017 , Porto, Portugal