Optical studies of two dimensional gratings in fused silica, GE 124, and Foturan glasses fabricated using femtosecond laser pulses
Optical studies of two dimensional gratings in fused silica, GE 124, and Foturan glasses fabricated using femtosecond laser pulses
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DOI：
10.1016/j.optcom.2009.08.041
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发表时间：
2009-12
影响因子：
2.4
通讯作者：
K. Vishnubhatla;Venugopal Rao Soma;R. S. S. Kumar-R.-S.-S.-Kumar-2218120089;M. Ferrari;D. N. Rao
中科院分区：
文献类型：
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作者：
K. Vishnubhatla;Venugopal Rao Soma;R. S. S. Kumar-R.-S.-S.-Kumar-2218120089;M. Ferrari;D. N. Rao
在此，我们介绍了飞秒激光直写和熔融石英，GE 124和Foturan™玻璃中的二维光栅的光学特性研究的结果。不同的输入能量和样品的空间取向实现了各种结构。各种表征技术，包括荧光光谱，显微拉曼光谱，激光共聚焦显微镜被用来分析的结构和物理修改的焦点体积导致的折射率的变化。从光栅结构观察到的衍射效率为0.9 -12%。在Foturan玻璃的激光改性区域中观察到宽带发射。所得到的结果进行了分析，在最近的工作中类似的玻璃和探索这种结构在光子学领域的应用。
Herein we present results on the femtosecond laser direct writing and optical characterization studies of two dimensional gratings in fused silica, GE 124, and Foturan™glasses. Varieties of structures were achieved with varying input energy and spatial orientation of the samples. Various characterization techniques including fluorescence spectroscopy, micro-Raman spectroscopy, and laser confocal microscopy were employed to analyze the structural and physical modifications at the focal volume resulting in change of refractive index. Diffraction efficiencies of ∼9–12% were observed from the grating structures. A broad-band emission was observed in the laser-modified region of the Foturan glass. The obtained results are analyzed in the light of recent work in similar glasses and exploring the applications of such structures in the fields of photonics.