Optical chaos and hysteresis in a laser-diode pumped Nd doped fibre laser |
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| Institution: | 1. Center for Advanced Laser Technology, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, China;2. Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin 300401, China;3. DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark;1. Department of Physics, Harbin Institute of Technology, Harbin 150080, China;2. National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China;1. National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China;2. Center for Advanced Laser Technology, Hebei University of Technology, Tianjin 300401, China;3. Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin 300401, China;4. School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China;1. Institut Lumière Matière, Université Lyon 1—UMR 5306 CNRS, 69622, Villeurbanne, France;2. SIMAP-EPM, UMR 5266 CNRS, 38402, Saint Martin d''Hères, France;3. RSA le rubis SA, BP 16, 38560, Jarrie, Grenoble, France |
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| Abstract: | Modulated pumping of a Nd3+ doped silica monomode fibre laser has been investigated experimentally. For small modulation depths the laser exhibits a resonance at the relaxation oscillation frequency, providing pulses of a few microseconds duration at a repetition rate in the region of 10 kHz, dependent on the average pump level above threshold. As the pump modulation depth is increased, hysteresis is observed as a function of modulation frequency, along with optical bistability. For further increase in modulation depth, optical chaos and period doubling are observed. Gain-switching has also been demonstrated. |
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