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<p>We experimentally and theoretically investigate the nonlinear dynamical characteristics of a&#xa0;diode-pumped all-solid-state passively Q‑switched Yb:YCa<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub> (Yb:YCOB) laser by employing a&#xa0;semiconductor saturable absorber mirror (SESAM). The system’s nonlinear behavior is analyzed through time series, histograms, phase diagrams, and bifurcation diagram. Experimental results reveal that when the absorbed pump power is set at 2.65 W, 2.69 W, 2.76 W, and 2.89 W, respectively, the laser sequentially exhibits period-one (P1), period-two (P2), period-four (P4), and chaotic pulsation (CP) states. The corresponding numerical simulations confirm that under specific pump rates, the laser reproduces these P1, P2, P4, and CP states, in agreement with the experimental observations. The evolution of the pulse dynamics follows a&#xa0;typical P1→P2→P4→CP bifurcation sequence, indicating that the system mainly undergoes a&#xa0;period-doubling route to chaos. These findings demonstrate that the pump power (pump rate) plays a&#xa0;critical role in governing the nonlinear dynamical behavior of the all-solid-state passively Q‑switched Yb:YCOB laser.</p>

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Nonlinear dynamics of a diode-pumped all-solid-state passively Q-switched Yb:YCOB laser

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • Tao Xiong,
  • Tao Deng,
  • Xiaodong Lin,
  • Xi Tang,
  • Yingke Xie,
  • Li Fan,
  • Zhengmao Wu,
  • Ziye Gao

摘要

We experimentally and theoretically investigate the nonlinear dynamical characteristics of a diode-pumped all-solid-state passively Q‑switched Yb:YCa4O(BO3)3 (Yb:YCOB) laser by employing a semiconductor saturable absorber mirror (SESAM). The system’s nonlinear behavior is analyzed through time series, histograms, phase diagrams, and bifurcation diagram. Experimental results reveal that when the absorbed pump power is set at 2.65 W, 2.69 W, 2.76 W, and 2.89 W, respectively, the laser sequentially exhibits period-one (P1), period-two (P2), period-four (P4), and chaotic pulsation (CP) states. The corresponding numerical simulations confirm that under specific pump rates, the laser reproduces these P1, P2, P4, and CP states, in agreement with the experimental observations. The evolution of the pulse dynamics follows a typical P1→P2→P4→CP bifurcation sequence, indicating that the system mainly undergoes a period-doubling route to chaos. These findings demonstrate that the pump power (pump rate) plays a critical role in governing the nonlinear dynamical behavior of the all-solid-state passively Q‑switched Yb:YCOB laser.