Thermal Lensing, Laser Performance at 1.06 μm and 0.53 μm of a NYAB Laser End pumped by a Diode laser array

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Passively Q-switched Self-frequency Doubling NYAB laser with GaAs Saturable Absorber

By using a passive Q-switch with GaAs saturable absorber, the Q-switched self-frequency doubling NYAB laser at 0.531μm has been successfully realized. The pulse width and the single pulse energy are measured. The numerical solutions of the coupling wave rate equations are in agreement with the experimental results.     

氙灯泵浦的NYAB晶体调Q激光运转特性及实验研究

首次报道了氙灯泵浦的自激活自倍频NYAB复合功能晶体的BDN染料片调Q运转,获得了自倍频绿光单脉冲.测量了不同L和T_o情况下的绿光脉冲的能量、脉宽和峰值功率.文中还从理论上推导了自激活自倍频晶体调Q激光器的方程组.数值求解方程组,所得的理论数据与实验结果很好地相符.最后,讨论了进一步提高绿光脉冲峰值功率的途径.     

ICP—AES法测定硼酸铝钇钕（NYAB）激光晶体中的Nd

应用ICP-AES法分析自倍频激光晶体(NYAB)样品中的Nd,在石墨坩埚中于500℃用NaOH熔融分解样品,方法的回收率为96%～105%,测定的相对标准偏差为1.42%,方法简便,可给出满意的分析结果。     

自混频激光理论模型及应用

建立了在同一块非线性激光晶体上实现自混频激光的理论模型。该模型计入了具有任意腰斑大小的泵浦光和腔内基频光的空间分布,并将该模型应用到NYAB和Nd:GdCOB的自混频蓝光实验。理论分析预测和证实了一些实验结果,同时,讨论和总结了提高自混频激光输出效率的途径。     

高效率光参量转换

用一块6.5×9×20(长度)mm KTP晶体获得625nm～3575nm的皮秒可调谐激光.能量转换效率高达30%,最大信号光峰值功率34MW.     

Q-switched NYAB laser end-pumped by a high-power diode-laser array

A diode-laser array end-pumped acousto-optically Q-switched NYAB laser operating at both 1.06 and 0.53 μm has been demonstrated. An average output power of 1.3 W at 1.06 μm at a pulse repetition frequency (PRF) of 60 kHz was obtained with an optical conversion efficiency of 18.1% and a slope efficiency of 21.3%. At the incident pump power of 6.1 W, the 1.06 μm shortest laser pulse was reached at PRF of 20 kHz with FWHM width measured to be 32 ns, yielding a largest pulse energy of 30 μJ, and a highest peak power of 938 W. The attainable maximum average green power was found to be 185 mW, with an optical conversion efficiency of 3%.     

Performance of CW NYAB laser at 1.06 μm end-pumped by a high-power diode-laser-array

A CW NYAB laser at 1.06 μm end-pumped by a high-power diode-laser-array has been demonstrated. At the incident pump power of 11 W, a maximum output power of 3.2 W was achieved, resulting in an optical conversion efficiency of 29.1%, and average slope efficiency of 37.5%. The output beam quality factor was measured to be M²=1.9. The internal losses caused by the NYAB crystal were measured to be 0.035 cm⁻¹. The NYAB crystal was also found to exhibit very strong thermal lensing under high-power end-pumped conditions.     

Passively Q-switched Self-frequency Doubling NYAB laser with GaAs Saturable Absorber

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激光二极管泵浦NYAB激光器的空间分布速率方程的研究

报道了用以描述激光二极管泵浦ＮＹＡＢ连续激光顺空间分布特性的非线性耦合的速率方程组，和以此方程组进行的理论计算，讨论了泵浦光和激光的空间分布、晶体的最佳长度、输出镜的最佳透过率对激光器输出的影响，给出了ＮＹＡＢ激光器设计的一些依据。