STRUCTURAL AND OPTICAL STUDY OF SILICATE-GLASSES FOR NONLINEAR OPTICAL-DEVICES
STRUCTURAL AND OPTICAL STUDY OF SILICATE-GLASSES FOR NONLINEAR OPTICAL-DEVICES
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DOI：
10.1016/0022-3093(89)90469-9
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发表时间：
1989-01-01
影响因子：
3.5
通讯作者：
POWERS, JD
中科院分区：
文献类型：
--
作者：
VOGEL, EM;KOSINSKI, SG;POWERS, JD
非线性光学玻璃具有快速响应时间和极低的吸收系数，是超高速（皮秒）全光开关中很有前途的材料。我们最近报道了等摩尔artio2·B2O3·Na2O·sio2玻璃中相对较高的三阶光学非线性。该玻璃成分的非线性折射率系数n2为4 × 10−19m2/W。为了确定这些玻璃的各种物理性质与结构和/或组成的关系，我们在四组分tio2·Nb2O5·Na2O·sio2体系中合成了一系列玻璃。用拉曼光谱研究了它们的结构，测量了它们的线性折射率和非线性折射率系数。结果表明，线性折射率主要由Ti+Nb的总浓度决定，而掺杂Ti的非线性折射率系数远大于掺杂Nb的非线性折射率系数。Ti和Nb的共同存在扩大了该体系的玻璃化形成区域。
Nonlinear optical glasses with fast response times and very low absorption coefficients are promising materials for use in ultra-fast (picosecond) all-optical switches. We have recently reported a relatively high third-order optical nonlinearity in equimolarTiO2·B2O3·Na2O·SiO2glass. The nonlinear index coefficientn2for this glass composition was found to be 4 × 10−19m2/W. In order to determine the relationship of the various physical properties to the structure and/or composition in these glasses, we have synthesized series of glasses in the four-componentTiO2·Nb2O5·Na2O·SiO2system. Their structures have been studied by Raman spectroscopy, and their linear refractive indices and nonlinear index coefficients were measured. The data show that the linear refractive index is mainly determined by the total concentration ofTi+Nb, whereas the nonlinear index coefficient is much larger for Ti than for Nb doping. The combined presence of Ti and Nb extends the glass forming region in this system.