Dynamic process of self-started self-mode-locked Ti:sapphire laser with a semiconductor saturable absorber mirror |
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| Authors: | Ching-yue Wang Yong Wang Lu Chai Weili Zhang Qirong Xing Zhigang Zhang |
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| Institution: | Ultrafast Laser Laboratory, College of Precision Instruments & Optoelectronics Engineering, and Optoelectronics Information Science and Technology Laboratory, MOE, Tianjin University, Tianjin 300072, People's Republic of China |
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| Abstract: | Dynamic process of self-started self-mode-locked Ti : sapphire laser with a semiconductor saturable absorber mirror (SESAM) was investigated and two mode-locking starting processes were found in which one is fast and the other is slow. In the fast starting process, a mode-locking build-up time of about 400 μs was needed during which pure passive mode-locking process was caused by the SESAM and Kerr-lens mode-locking process arose from the nonlinearity of the Ti : sapphire gain medium. In the slow starting process, a build-up time of about several minutes was found in which temperature effect of the SESAM dominates the dynamic process. |
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| Keywords: | Ti:sapphire laser Semiconductor saturable absorber mirror (SESAM) |
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