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1.
室温下的永久性光谱烧孔   总被引:1,自引:1,他引:0  
张家骅  黄世华 《发光学报》1991,12(2):181-182
本文首次报导了Sm2+掺杂的碱土金属氟卤化物在室温下的光谱烧孔.室温下永久性光谱烧孔的实现,将对频域光存储的应用起到推动作用.  相似文献   

2.
光谱烧孔技术   总被引:2,自引:0,他引:2  
黄菁  唐志列  梁瑞生 《光学技术》2000,26(4):379-382
论述了光谱烧孔技术的动力学理论模型 ;介绍了单光子烧孔和多光子烧孔所取得的实验结果 ;讨论了光谱烧孔的发展趋势 :提高烧孔度 ,实现室温烧孔和提高探测及读出时的信噪比。问题的关键在于光致填孔机制的研究。同时提出将它投入实际应用亟待解决的问题 ,即作为一种可能的高密度频域光信息存储手段所亟待解决的问题是开发适应于此技术的新材料 ,深入研究材料体系的烧扎特性  相似文献   

3.
基于光谱烧孔在高密度光存储中的可能应用,研究了谱线非均匀加宽、荧光谱线窄化、高温永久性光谱烧孔、烧孔机理、烧孔动力学过程和光谱孔的热稳定性。在国际上率先设计并研制出二价钐离子掺杂碱土金属氟卤化物混晶高温光谱烧孔体系,实现了室温永久性光谱烧孔,获得了室温寿命300h的光谱孔。利用时间分辨光谱分离出非均匀线形内的各局域组态,比较烧孔前后光谱再分布证实了三价钐离子的电子陷阱作用。利用Block理论分析了烧孔动力学过程。  相似文献   

4.
研究了光谱烧孔的填孔过程,在几种有机电子转移型永久性烧孔材料中,得到了光谱烧孔的光擦除过程中孔的擦除程度随样品中受体浓度的减少而减弱,并受擦孔光的光子能量影响,同时与受体本身性质有关的实验结果.得出填孔过程也是一种电子转移过程的结论,并提出了一个能级模型对实验结果进行了分析.  相似文献   

5.
报道在有机光子选通光谱烧孔材料苯基四苯并卟啉锌/芳晴系统中,进行全息光谱烧孔和图像存贮的实验结果.实验表明全息烧孔极大地提高了光谱孔的检测灵敏度和信噪比.通过全息光子选通光谱烧孔,成功地进行了光子选通型的频率选择的多幅全息图存贮,得到清晰的图像再现 关键词:  相似文献   

6.
赵有源  尹榆 《光学学报》1998,18(2):60-165
用偏振光谱方法对有机固体材料频域存贮材料进行单光子和双光子的选通光谱烧孔,获得了高的信号背景(噪声)比(SBR)。文章介绍偏振光谱烧孔原理和实验上得到高信号背景比的方法和结果,展示了偏振光谱烧孔技术在高分辨光谱和频域信号存贮应用的良好前景。  相似文献   

7.
姜联合  田明真 《发光学报》1995,16(3):205-210
研究了光谱烧孔的填孔过程,在几种有机电子转移型永久性烧孔材料中,得到了光谱烧孔的光擦除过程中孔的擦除程度随样品中受体浓度的减少而减弱,并受擦孔光的光子能量影响,同时与受体本身性质有关的实验结果.得出填孔过程也是一种电子转移过程的结论,并提出了一个能级模型对实验结果进行了分析.  相似文献   

8.
光谱烧孔型全息存储因高密度、抗干扰、低能耗的特点而具备了海量“冷数据”存储潜力。本文结合作者的科研经历,首先简要回顾了光谱烧孔的发展历程和存在瓶颈;随后基于等离激元光谱烧孔的基本原理,阐述了过渡金属氧化物/贵金属功能基元室温全息光谱烧孔的新思想;继而展示了作者在大面积全息盘片研制和小型化全息存储器开发方面的最新成果;最后对未来利用功能基元空间序构实现高密度频域全息光谱烧孔进行了展望。作者所在团队的系列工作开辟了高密度光存储的新方向,同时为发展过渡金属氧化物基高集成光电器件提供了有益的思路。  相似文献   

9.
建立了全息光栅光谱烧孔技术中,系统的存储密度,读出信噪比和材料特性,读写条件关系的数理模型,计算机模拟定量分析得到了最佳材料特参量空间。研究表明,全息光栅光谱烧孔技术可放宽系统对材料特性的要求,将为烧孔材料研究提供新的理论依据。  相似文献   

10.
报道固体选通光谱多重光谱烧孔研究的新进展,分析影响多生烧孔形成的一些主要因素,首次报道了在有机材料ZntbP/CA/PhR的非均匀加宽线内获得一次连续烧出100多光谱孔的结果,还进一步报道用穿带激光获得更窄线宽的光谱烧孔的情况。  相似文献   

11.
An accurate technique was implemented to measure spectral hole burning in rare-earth amplifiers at room temperature, showing that thulium-doped fiber amplifiers exhibit hole depths four times lower than those of C -band erbium-doped fiber amplifiers.  相似文献   

12.
Fujita K  Tanaka K  Hirao K  Soga N 《Optics letters》1998,23(7):543-545
Persistent spectral hole burning has been observed at 77 K, 180 K, and room temperature for Eu(3+) in sodium aluminosilicate glass melted under a reducing atmosphere. In particular, room-temperature persistent spectral hole burning is reported for the first time to our knowledge in Eu(3+) -doped materials. The persistent hole is accompanied by no antiholes and lasts for 1 h at least. The thermal stability of the hole is greater than that of a persistent hole burned for Eu(3+) in sodium aluminosilicate glass melted in air.  相似文献   

13.
Fluorescence and efficient persistent spectral hole burning of Eu3+ at 77 K were observed in chalcohalide glasses. The depth of the hole was approximately 30% after a burning process of 1 min with 50 mW power, and it was completely erased with Ar+ laser irradiation. The hole survived room temperature heat treatment and showed good thermal stability. The hole-burning mechanism was most probably the photo-reduction of Eu3+→Eu2+. Fluorescence from Eu3+ decreased with increasing temperature and disappeared at the temperature above ∼130 K.  相似文献   

14.
A switchable multi-wavelength erbium-doped fiber ring laser based on a compact in-fiber Mach-Zehnder interferometer comb filter at room temperature is presented. The comb filter is formed by splicing a section of twin-core fiber between two single mode fibers. By adjusting the states of the polarization controller appropriately, the laser can be made to operate in stable single-, dual- and three-wavelength lasing states. The operation principle is based on spectral hole burning induced by the saturated effect and polarization hole burning.  相似文献   

15.
Fujita K  Ohashi Y  Hirao K 《Optics letters》2003,28(7):567-569
We have observed grating-based morphological hole burning in Sm2+-doped glass powders at room temperature. When photobleaching on the 4f(6)-4f(5)5d transition of Sm2+ is combined with multiple light scattering, holes are produced in frequency and wave-vector domains. The hole profile depends on the amount of light absorption of Sm2+; it sharpens as the absorption decreases. The variation of the hole shape is explained theoretically based on a diffusion approximation.  相似文献   

16.
A switchable multi-wavelength fiber ring laser is proposed and experimentally demonstrated with a novel side-leakage photonic crystal fiber (SLPCF) based filter incorporated into the ring cavity at room temperature. Stable multi-wavelength laser operations can be achieved due to the spatial mode beating, polarization hole burning and spectral hole burning effects. By adjusting the polarization controller appropriately, the laser can be switched among the single-, dual- and triple-wavelength lasing oscillations whose signal-to-noise ratio is up to 50 dB. In addition, the lasing wavelength can be also tuned and switched by applying the strain to the filter.  相似文献   

17.
An attempt is made to extend the spectacular variant of optical informatics efficient at liquid helium temperature—holography based on zero-phonon lines (ZPLs) and spectral hole burning, including time-and-space-domain holography—to higher temperatures, up to room temperature. At room temperature, both optical and Mössbauer narrow ZPLs exist; however, they do not have the inhomogeneous broadening that transforms a ZPL into a broad band, which is necessary for informatics based on light pulses. The idea of producing a band with an appropriate width from narrow ZPLs by using the Doppler effect is advanced. A variant of experimental realization of this idea by means of a scheme with a rotating disk covered by a layer of a material sensitive to spectral hole burning is considered. Numerical estimates were performed for narrow optical ZPLs and for the yet experimentally unconfirmed Mössbauer ZPL in the visible spectral range (dark blue nuclear light) that corresponds to a transition between the two low-lying levels of the 229Th isomer. For the narrowest optical ZPLs known at present, with a width of about 100 Hz, the estimates give favorable results, in particular, for prospects of realizing a photoelectrically accumulated stimulated photon echo.  相似文献   

18.
在醋酸纤维素薄膜中四苯基卟吩的零声子线和局域模   总被引:3,自引:0,他引:3  
测量了酸醋纤维素(cellulose acetate)薄膜中四苯基卟吩(α,β,γ,δ-tetraphenyporphin,即TPP)的吸收光谱。分析了Gauss型的非均匀加宽的零声子线,用Huang-Rhys-Pekar(H-R-P)Wp(S,)函数得到了H-R-P因子S~1.45.Raman散射实验证实了在TPP中有频率大约为1323cm-1振动模的存在,同时也观测到了频率大约为1440cm-1的吡咯C-H弯曲模、1357cm-1的吡咯=C-N拉伸振动模和频率大约为1155cm-1的单取代苯拉伸振动模。  相似文献   

19.
卟啉类有机体系THP/PMMA的永久性光谱烧孔   总被引:3,自引:3,他引:0  
陈凌冰  李军 《光学学报》1992,12(4):36-341
首次报道了四-对羟基苯基卟吩/有机玻璃体系(THP/PMMA)的单光子永久性光谱烧孔.研究了烧孔特性和成孔条件.测量了孔的稳定性,在液氦温度下孔的保存时间已超过几个小时.实现了孔的擦除和重复烧孔.探讨了烧孔机制,认为激光诱导质子转位变构是导致该体系永久性光谱烧孔的原因.  相似文献   

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