【摘要】 首次采用氧化石墨烯可饱和吸收体作为锁模启动元件在Tm,Ho∶CaYAlO₄激光器中实现了稳定的被动调Q锁模运转。在3%输出耦合镜下,Tm,Ho∶CaYAlO₄固体激光器获得了最低为293 mW的连续光出光阈值。在腔内引入氧化石墨烯可饱和吸收体后,当吸收抽运功率增大到1 859 mW时,Tm,Ho∶CaYAlO₄激光器进入稳定的调Q锁模运转状态。当抽运功率达到3 W时,获得中心波长为2 089 nm、斜效率为10.1%、对应最大输出功率为213 mW的被动调Q锁模脉冲,重复频率为100 MHz,调Q包络中锁模脉冲的调制深度接近100%。更多还原

【Abstract】 Employing graphene oxide as a saturable absorber, we experimentally demonstrated a passively Q-switched mode-locked（QML） operation of a Tm,Ho∶CaYAlO₄ bulk laser. In this case, the absorbed threshold power of Tm,Ho∶CaYAlO₄ bulk laser was measured as 293 mW by using a 3% output coupler. When the absorption pumping power reached 1 859 mW, it entered a stable Q-switched mode-locked operation state. And when the pumping power reached 3 W, the corresponding maximum output power is 213 mW, corresponding to a slope efficiency of 10.1%, the central wavelength of 2 089 nm, the repetition frequency of 100 MHz, and the modulation depth being close to 100%.更多还原