金纳米棒饱和吸收体1μm被动调Q固体激光器  

Passively Q-Switched 1 μm Solid-State Laser Using Gold Nanorod as Saturable Absorber

作　　者：黄海涛[1,2] 李敏[1] 金琳[1] 王辉[1] 刘翩[1] 沈德元[3] 

机构地区：[1]江苏师范大学物理与电子工程学院,江苏徐州221116 [2]江苏省先进激光材料与器件重点实验室,江苏徐州221116 [3]复旦大学光科学与工程系,上海200433

出　　处：《中国激光》2017年第7期214-218,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(61308047;61605068)

摘　　要：受表面等离激元共振效应的影响,金纳米棒饱和吸收体具有饱和吸收宽带可调、非线性响应时间快等特点,且便于与各种激光谐振腔整合,是一种有潜力的宽波段饱和吸收体材料。报道了一种基于金纳米棒饱和吸收体的1μm波段被动调Q固体激光器。将金纳米棒溶液旋涂于输出镜上,并将其作为可饱和吸收体构建到激光谐振腔中,在LD端面抽运Nd:YVO_4激光器中实现了1064nm被动调Q运转。在抽运功率为7.5 W时获得了平均输出功率为540mW,最小脉冲宽度为138ns,重复频率为602kHz的脉冲激光输出。Benefiting from the surface plasmon resonance effect, the gold nanorod saturable absorber possesses the properties of tunable broadband of saturable absorption and fast nonlinear response. It can also easy integrate with a variety of laser resonators, making it a promising saturable absorber with a wide broadband. The passively Qswitched 1 μm solid-state laser using gold nanorods as saturable absorbers is demonstrated. The gold nanorods are directly spin coated on the output coupler, and introduced in the laser resonator as saturable absorbers. Passively Q- switched operation of a LD pump Nd： YVO4 laser at 1064 nm is realized accordingly. The pulsed laser output with a maximum average output power of 540 mW, a minimum pulse width of 138 ns, and a pulse repetition rate of 602 kHz are achieved when the pump power is 7.5 W.

关 键 词：激光器 金纳米棒 被动调Q 1μm波段 

分 类 号：TN248.1[电子电信—物理电子学]