论文部分内容阅读
通过采用若干激光增益介质和非线性频率变换技术,有效地扩展了皮秒及飞秒激光的波长。在可见光波段,利用自建的高能量400nm倍频皮秒钛宝石激光作泵浦,通过LBO参量放大,得到了波长从450~750nm可调、最高单脉冲能量达30mJ的可调谐皮秒激光脉冲;在红外波段,通过上述方案不仅产生了波长850nm~3.6μm的皮秒闲频光,而且相继利用Cr:Mg2SiO4和Cr:YAG晶体作为增益介质,获得了中心波长分别在1280nm和1450nm波段的飞秒激光脉冲。利用Yb:YAG、Yb:GYSO、Nd:GdVO4、Nd:LuVO4等晶体作增益介质,获得了中心波长1053、1093nm的飞秒激光脉冲及912、916nm的皮秒脉冲。这些具有不同波长特性的超短脉冲激光光源,可望在许多领域获得重要应用。
By using several laser gain media and non-linear frequency conversion techniques, the picosecond and femtosecond laser wavelengths are effectively extended. In the visible light band, a tunable picosecond laser pulse with a tunable wavelength of 450 ~ 750nm and a maximum single pulse energy of 30mJ was obtained by self-built high energy 400nm double-frequency picosecond Ti: sapphire laser. In the infrared band, not only picosecond idler light with the wavelength of 850nm-3.6μm but also Cr (superscript 2 +) crystal and Cr: YAG crystal with the central wavelength of 1280nm and 1450nm Second laser pulse. By using Yb: YAG, Yb: GYSO, Nd: GdVO4, Nd: LuVO4 crystals as the gain medium, femtosecond laser pulses with central wavelength of 1053 and 1093 nm and picosecond pulses of 912 and 916 nm were obtained. These ultra-short pulse laser sources with different wavelength characteristics are expected to gain important applications in many fields.