Passively Q-switched Nd:YVO4 waveguide laser using graphene as a saturable absorber |
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| Affiliation: | 1. School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;2. Laser Microprocessing Group, Universidad de Salamanca, Salamanca 37008, Spain;1. Laboratory for Developing New Materials and their Characterization, Department of Physics, Faculty of Science, University of Setif 1, 19000 Setif, Algeria;2. Laboratoire de Physique Quantique et de Modélisation Mathématique (LPQ3M), Département de Technologie, Université de Mascara, 29000 Mascara, Algeria;3. Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;4. Materials Modelling Lab, Department of Physics, Islamia College, Peshawar, Pakistan;5. Institute of Nano Electronic Engineering, Universiti Malaysia Perlis, 01000 Kangar, Perlis, Malaysia;1. Department of Chemistry, University of North Florida, Jacksonville, FL 32224, USA;2. Department of Physics, University of Puerto Rico, Mayagüez, PR 00681, USA;3. Optical Spectroscopy & Nano-Materials Lab, New College of Florida, Sarasota, FL 34243, USA;1. Physics and Optoelectronic Engineering College, Taiyuan University of Technology, Taiyuan 030024, China;2. Key Lab of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China;1. Institute of Automation and Control Processes FEB RAS, 5 Radio St., Vladivostok 690041, Russia;2. Far Eastern Federal University, 8 Sukhanova Str., Vladivostok 690041, Russia |
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| Abstract: | We report on passively Q-switched lasers in femtosecond laser written waveguide in Nd:YVO4 crystal. Using graphene as a saturable absorber, passively Q-switched waveguide laser operations are achieved along both TE and TM polarizations with single modal profiles. Furthermore, all-angle linear light pump was utilized to investigate the thorough information of the polarization effects of the laser, showing that the optimum polarization for laser generation is TE. The maximum average output power is estimated to be 129 mW with 12.2% slope efficiency, corresponding to single-pulse energy of 8.1 nJ, pulse duration of 25.0 ns and repetition rate of 16.3 MHz. |
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| Keywords: | Optical waveguides Q-switched waveguide lasers Laser material processing Graphene saturable absorber |
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