排序方式: 共有31条查询结果,搜索用时 15 毫秒
1.
2.
3.
A STUDY ON REAL-TIME LOW-FREQUENCY SPATIAL FILTERING PROCESS OF AN OPTICAL IMAGE USING LiNbO3:Fe CRYSTAL 下载免费PDF全文
The optimum image processing result of low-frequency filtering was obtained when LiNbO3:Fe crystal as a spatial filter was placed at a certain position behind the spatial-frequency spectral plane of an optical Fourier transform system, which corresponds to the minimum transmittance ratio in Z-scan curve. The experimental results show that self-defocusing due to photorefractive negative-lens effect is the main factor responsible for the low- frequency filtering. 相似文献
4.
对于掺铁铌酸锂晶体中不同全息记录配置下的磁光折变效应做了比较系统的理论分析,给出了铌酸锂晶体所有的磁光生伏打非零张量元. 详细计算并给出了不同全息纪录配置下的所有体光生伏打、磁光生伏打电流的解析形式. 理论结果表明,由于磁光生伏打效应引起了光激发电流的变化,所以对于每种配置全息光栅的衍射效率都会受到外加磁场的影响;对于不同的全息记录配置,磁场对铌酸锂晶体光折变非线性性质的影响也不同.讨论了一种确定特定张量元的方法.
关键词:
磁光生伏打
磁光折变效应
光生伏打 相似文献
5.
6.
We investigate femtosecond laser direct writing (FLDW) in the fabrication of magneto-optical (MO) microstructures. The experimental results show that FDLW can introduce positive refractive index change in the MO materials. With the increase of the writing intensity of femtosecond laser pulses, refractive index change increases, whereas Verdet constant of the damaged area decreases nonlinearly. With suitable writing intensity, we obtain a single-mode waveguide in which Verdet constant is 80% of the bulk MO glass. 相似文献
7.
8.
A novel plasmonic waveguide filter design based on three cascaded slot cavities is proposed. The cascaded nanocavities support a united resonant (UR) mode. Light is trapped in the middle nanocavity at telecom- muaication wavelenEth (1550 rim) when the UR mode exists. This phenomenon leads to the efficient transmittance and high Q factor of the plasmonic filter. The resonant wavelength and Q factor can be easily modulated by the cavity radii and the waveguide width. 相似文献
9.
10.
对细菌视紫红质膜在两束非同频光照射下的非线性吸收特性进行了详细的理论分析,并讨论了细菌视紫红质膜非线性吸收特性有光子学方面的一些新应用。 相似文献