Three-dimensional optical memory using glasses as a recording medium through a multi-photon absorption process
Three-dimensional optical memory using glasses as a recording medium through a multi-photon absorption process
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DOI：
10.1143/jjap.37.2263
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发表时间：
1998-04-01
期刊：
影响因子：
--
通讯作者：
Hirao, K
中科院分区：
文献类型：
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作者：
Qiu, JR;Miura, K;Hirao, K
采用聚焦800 nm、120 fs、200 kHz脉冲激光，在SiO2和Ge-SiO2玻璃中研究了多层光学数据存储的可行性。玻璃在300至1000 nm的波长范围内是透明的。在用800 nm紧聚焦飞秒激光照射后。在玻璃中形成折射率位。研究了折射率位的大小与激光脉冲平均功率和照射时间的关系。ESR谱表明，激光辐照后玻璃中的Si E '和GeE'色心浓度显著增加。基于多光子吸收过程在透明玻璃中写入三维折射率位有望成为一种用于制造具有超高存储密度和超高记录速度的光学存储器的有用方法。
;The feasibility of multilayered optical data storage was examined in SiO2 and Ge-SiO2 grasses by using a focused 800 nm, 120 fs, 200 kHz pulsed laser. The glasses are transparent in the wavelengths ranging from 300 to 1000 nm. After the irradiation with the 800 nm tightly focused femtosecond laser. a refractive-index bit was formed in the glasses. The relationships between the size of refractive-index bit versus average power and irradiation duration of the laser pulse have been examined. ESR spectra showed a significant increase in the concentration of SiE' and GeE' color centers in the laser irradiated glasses. Writing 3-dimensional refractive-index bit inside the transparent glasses based on a multi-photon absorption process is expected to become a useful method used to fabricate optical memory with both an ultra-high storage density and an ultra-high recording speed.