Zheng-nan SHI, Feng-ping YAN, Wen-guo HAN, et al. Optimal Design and Simulation of High Power Tm3+ Self-similar Pulse Laser. [J]. Chinese Journal of Luminescence 41(6):719-728(2020)
Zheng-nan SHI, Feng-ping YAN, Wen-guo HAN, et al. Optimal Design and Simulation of High Power Tm3+ Self-similar Pulse Laser. [J]. Chinese Journal of Luminescence 41(6):719-728(2020) DOI： 10.3788/fgxb20204106.0719.
Optimal Design and Simulation of High Power Tm3+ Self-similar Pulse Laser
A new numerical model for a 2 μm thulium-doped self-similar pulsed laser was established using nonlinear Schr dinger equation (NLSE). In this model, NLSE was used to describe the generation and propagation of the pulse in the laser. The evolution of the pulse in the laser cavity was simulated using MATLAB software. The parameters such as the net dispersion, the gain coefficient and the saturable absorber were optimized. The typical 2 μm self-similar pulse generation area and characteristics were obtained through simulation. In the optimal operating range, a high-power parabolic pulse with strict positive chirp with the energy of 7.87 nJ and the pulse width of 30.58 ps was obtained. At the same time, the effects of parameters such as the net dispersion, the gain coefficient and absorber on the self-similar pulse were analyzed. We simulated the grating for dispersion compensation. The output pulse width reached 547 fs and the pulse peak power reached 20.85 kW. This paper gives guidance for obtaining high-power self-similar pulses.
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