We demonstrate a high-energy and high-power pulse laser on a xenon lamp-pumped Er:YAP crystal. The laser performance and thermal focal lengths under different working frequencies are discussed. The results show that t...We demonstrate a high-energy and high-power pulse laser on a xenon lamp-pumped Er:YAP crystal. The laser performance and thermal focal lengths under different working frequencies are discussed. The results show that the thermal lens effect is gradually aggravated with the increase of working frequencies, and even working at 100 Hz, a single pulse energy of 234 m J can be achieved. A maximum average power of 41.5 W is achieved with a working frequency of 20 Hz and slope efficiency of 2.82%. This output power is much higher than other xenon lamp-pumped erbium laser devices.A Q-switched laser is demonstrated by using the TeO2crystal, the maximum output energies of 11.5 m J and 3.5 m J are obtained at 50 and 100 Hz, the corresponding peak powers are 93.4 k W and 17.2 kW, respectively.The laser wavelengths and beam quality factors are also characterized in the free-running and Q-switched modes. A higher pulse energy and peak power laser could be achieved further by improving the damage threshold of TeO2acousto-optical Q-switching. All the experimental results illustrate that the xenon lamp-pumped Er:YAP laser is a promising candidate for high-power and high-frequency mid-infrared laser devices.展开更多
We have developed a Nd:YAP single crystal Aber laser with linearly polarised light output at 1.0795μm.The laser is 100μm in diameter and operated with a threshold of 6.65mW.The slope efficiency is 12.9%.
文摘目的研究釉质表面经Nd:YAP激光处理后对其与不同窝沟封闭剂的粘接强度的影响。方法选取2023年6月至2024年3月因正畸减数需要而拔除的前磨牙,随机分为8组:组1,酸30+Clinpro Sealant窝沟封闭剂(CS)组;组2,酸30+Dyad Flow自粘结流动树脂(DF)组;组3,激光+CS组;组4,激光+DF组;组5,激光+酸30+CS组;组6,激光+酸30+DF组;组7,激光+酸10+CS组;组8,激光+酸10+DF组,应用Instron电子万能材料试验机检测各样本剪切粘接强度。应用扫描电子显微镜(scanning electron microscope,SEM)观察未处理组、酸蚀处理组、Nd:YAP激光处理组以及Nd:YAP激光+酸蚀处理组的表面形貌。结果组1和组2的剪切粘接强度分别与组3至组8进行对比,差异有统计学意义(P<0.05)。组3和组4剪切粘接强度均小于组1、组2、组5、组6、组7和组8,差异有统计学意义(P<0.001)。其余各组间差异无统计学意义(P>0.05)。SEM观察显示,酸蚀处理组表面粗糙,Nd:YAP激光处理组表面局部熔融,而Nd:YAP激光+酸蚀处理组的熔融结构表面出现多孔结构。结论在应用Nd:YAP激光基础上结合酸蚀处理,可以缩短酸蚀时间,降低整体操作时间,同时获得良好的封闭剂粘接效果,有助于封闭剂的长期保留。
基金supported by the Natural Science Foundation of Anhui Province (Grant No. 2208085QF217)the National Natural Science Foundation of China (Grant No. 52102012)the Hefei Institutes of Physical Science (HFIPS) Director’s Fund (Grant No. YZJJ2022QN08)。
文摘We demonstrate a high-energy and high-power pulse laser on a xenon lamp-pumped Er:YAP crystal. The laser performance and thermal focal lengths under different working frequencies are discussed. The results show that the thermal lens effect is gradually aggravated with the increase of working frequencies, and even working at 100 Hz, a single pulse energy of 234 m J can be achieved. A maximum average power of 41.5 W is achieved with a working frequency of 20 Hz and slope efficiency of 2.82%. This output power is much higher than other xenon lamp-pumped erbium laser devices.A Q-switched laser is demonstrated by using the TeO2crystal, the maximum output energies of 11.5 m J and 3.5 m J are obtained at 50 and 100 Hz, the corresponding peak powers are 93.4 k W and 17.2 kW, respectively.The laser wavelengths and beam quality factors are also characterized in the free-running and Q-switched modes. A higher pulse energy and peak power laser could be achieved further by improving the damage threshold of TeO2acousto-optical Q-switching. All the experimental results illustrate that the xenon lamp-pumped Er:YAP laser is a promising candidate for high-power and high-frequency mid-infrared laser devices.
文摘We have developed a Nd:YAP single crystal Aber laser with linearly polarised light output at 1.0795μm.The laser is 100μm in diameter and operated with a threshold of 6.65mW.The slope efficiency is 12.9%.
