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利用光锥耦合的ICCD系统探测荧光染料标记的生物芯片,并对CCD芯片和像增强器制冷,以提高探测灵敏度。基于实验分析结果,指出背景噪声的主要来源为杂散光和生物芯片基底所发的荧光,指出用镜头成像限制了系统探测灵敏度的提高,可采用低荧光物质作为生物芯片的基底对系统加以改进。 相似文献
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Realization of Arbitrary Inverse Unitary Transformation of Single Mode Fibre by Using Three Wave Plates 下载免费PDF全文
We report a method to realize the arbitrary inverse unitary transformation imposed by a single-mode fibre on photon's polarization by the succession of two quarter-wave plates and a half-wave plate. The process of realization is analysed on a Poincar6 sphere due to the fact that unitary transformation does not change the angle formed by polarization state vector. The method is meaningful in quantum communication experiment such as quantum teleportation, in which an unknown arbitrary quantum state should be kept to be unchanged in the case of using a single-mode fibre for time delay.[第一段] 相似文献
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Polarization filtering and atomic cell filtering are applied in the identification of Stokes signals in an atomic ensemble,and reduce the noise to a level of 10 5 and 10 4 respectively.Good Stokes signals are then obtained.In this article the two filtering systems and the final Stokes output are presented,and the optimization of the polarization filtering system is highlighted. 相似文献
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