Terrace-microsphere lasers: spherical cavity lasers for multiwavelength emission
Terrace-microsphere lasers: spherical cavity lasers for multiwavelength emission
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Terrace-microsphere 激光器：用于多波长发射的球腔激光器
DOI：
10.1117/12.841087
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
S. Shibata
中科院分区：
文献类型：
--
作者：
H. Uehara;T. Yano;S. Shibata
我们成功地制造出了用于激光发射的阶梯微球：具有阶梯状抽光入口的微米级球形腔激光器。“梯田-微球”是直径为30μm的高折射率玻璃球（nD=1.93），其中梯田部分为有机-无机材料。玻璃球为BaO-SiO2-TiO2玻璃体系，含有几ppm的Nd3+。以3-甲基丙烯氧基丙基三甲氧基硅烷和四甲基甲氧基硅烷为原料，采用溶胶-凝胶法制备了折射率nD=1.45的有机-无机杂化材料。在玻璃球与聚四氟乙烯片的交界处，用微毛细管注入1微升的溶胶液滴，形成阶地部分。附着在球体上的土源部分显示出类似于阶地结构的平坦部分。利用可调谐连续波Ti：蓝宝石激光器（λ=700nm ~ 850nm）泵浦平台微球，选择合适的泵浦波长。在约800nm波长处泵送平台部分，证明了wgm引起的强共振。喇曼散射和Nd3+荧光分别在840 ~ 880nm和880 ~ 940nm波长范围内产生共振。因此，我们可以展示在近红外扩展波长范围（840-940nm）的多波长激光器（约100谱线）的潜在应用。WGMs的受激拉曼发射阈值为4mW。
We have successfully made terrace-microspheres for laser emission: micrometer size spherical cavity laser having terrace shaped pumping light entrance. "Terrace-microsphere" is a high refractive index glass sphere (nD=1.93) of 30μm in diameter with terrace portion of organic-inorganic materials. The glass sphere is in BaO-SiO2-TiO2 glass system and contain a few ppm of Nd3+. Organic-inorganic hybrid materials of refractive index nD=1.45 were prepared by sol-gel technique using 3-methacryloxypropyltrimethoxysilane and tetramethoxysilane as starting materials. To make terrace portion, a pico-liter of sol droplet was supplied with a micro-capillary into the boundary between a glass sphere and a Teflon sheet. The sol-derived part attached to a sphere showed the flat portion like a terrace structure. The terrace-microspheres were pumped with a tunable CW Ti:sapphire laser (λ=700nm-850nm) for choosing the suitable pumping wavelengths to WGMs. Pumping the terrace portion at around 800nm wavelength, strong resonances due to WGMs were demonstrated. The resonances originated from Raman scattering and Nd3+ fluorescence were observed at 840-880nm and 880-940nm wavelength region respectively. Consequently, we can show the potential application for a multi-wavelength laser (about 100 lines) at the extended wavelength range (840-940nm) in the near-infrared. Stimulated Raman emission of WGMs was performed with threshold of 4mW.
涂层微球作为球腔拉曼激光器
DOI：
--
发表时间：
2005
期刊：
13^<th> International Workshop on Sol-Gel Science and Technology, UCLA, Los Angels, USA
影响因子：
--
作者：
S.Shibata;S.Ashida;H.Segawa;T.Yano
通讯作者：
T.Yano
用于球形微腔的溶胶-凝胶衍生球体
DOI：
--
发表时间：
2007
期刊：
Acc. Chem. Res. 40
影响因子：
--
作者：
S. Shibata;T. Yano;H. Segawa
通讯作者：
H. Segawa