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针对传统实验方法存在操作繁琐、谐振点附近电压变化缓慢等问题,提出了改进实验测量的方法,通过测量电容电感两端合电压与信号源输出电压的比值随频率变化曲线来测定谐振频率。与传统实验方法对比表明,该实验方法不仅能达到与传统实验方法相同的实验结果,而且能改进实验操作,并加深学生从不同角度对电路谐振特性的理解。为RLC串联电路谐振频率的测量提供了新的思路和切实可行的实验方案。 相似文献
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重点阐述了虚拟物理实验平台建设的主要内容,并对虚拟物理实验平台与传统实验进行比较,总结了虚拟实验平台的优势,最后对虚拟实验平台的教学模式进行了研究和探讨。 相似文献
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分析、比较了DIS实验与传统实验各自的特点,通过案例对中学物理实验类型的选择给出有关的说明. 相似文献
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根据"牛顿环"产生的条件,对多功能型分光仪进行改装、定标,在此基础上搭载牛顿环实验装置.利用该装置测量了平凸透镜的曲率半径R,并对数据进行处理与对比,其实验结果与传统实验十分接近.利用多功能型分光仪搭建牛顿环实验改变了传统实验教学模式,利于学生创新能力的培养. 相似文献
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本以几个典型实验为例,简述了光纤在光学设计性实验中的应用,改革了光学设计性实验内容陈旧、题目少的现状,使一些原来在一般实验室条件下无法观测到的光学现象能够很容易地观察和定量测量。从而加深了学生对光的本质及规律的认识和理解,并可使学生对光纤有所了解。 相似文献
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A glass fiber piezooptical optical bistability device is reported.Basing on pho-toelastic and strain effects of single-mode fiber,we have realized piezooptical modulation andperformed experiments of optical bistability. 相似文献
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Decreased vibrational susceptibility of Fabry--Perot cavities via designs of geometry and structural support 总被引:3,自引:0,他引:3
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Ultra-stable optical cavities are widely used for laser frequency
stabilization. In these experiments the laser performance relies on
the length stability of the Fabry--Perot cavities. Vibration-induced
deformation is one of the dominant factors that affect the stability
of ultra-stable optical cavities. We have quantitatively
analysed the elastic deformation of Fabry--Perot cavities with various shapes
and mounting configurations. Our numerical result facilitates a
novel approach for the design of ultra-stable cavities that are
insensitive to vibrational perturbations. This approach can be
applied to many experiments such as laser frequency stabilization,
high-precision laser spectroscopy, and optical frequency standards. 相似文献
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We demonstrate a novel dual color magneto–optical trap (MOT), which uses two sets of overlapping laser beams to cool and trap 87 Rb atoms. The volume of cold cloud in the dual color MOT is strongly dependent on the frequency difference of the laser beams and can be significantly larger than that in the normal MOT with single frequency MOT beams. Our experiment shows that the dual color MOT has the same loading rate as the normal MOT, but much longer loading time, leading to threefold increase in the number of trapped atoms. This indicates that the larger number is caused by reduced light induced loss. The dual color MOT is very useful in experiments where both high vacuum level and large atom number are required, such as single chamber quantum memory and Bose–Einstein condensation (BEC) experiments. Compared to the popular dark spontaneous-force optical trap (dark SPOT) technique, our approach is technically simpler and more suitable to low power laser systems. 相似文献
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聚合物弥散液晶材料在1550nm的电光特性研究 总被引:2,自引:0,他引:2
实验研究了不同配方及工艺条件下,聚合物弥散液晶(PDLC)材料在1550nm处的电控光透射特性。由此筛选合适的配方和工艺,研制了聚合物弥散液晶电控可调光衰减器样品。实验说明,在1550nm工作点,50%左右合适的液晶含量的聚合物弥散液晶样品能够获得更好的电控光学性能。采用配方质量比ω(DHPA):ω(E7):ω(RB):ω(NVP):ω(NPG)=100:100:3:2:1.5的配方,制作在1550nm工作的聚合物弥散液晶光衰减器样品。经检测,输入光源为1550mm,223μW时,器件插入损耗为2.3dB,衰减调节范围为13dB,线性工作区域为20~70V。 相似文献
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针对现有膜厚监控系统的双平行光路系统和监测光直接照射单色仪入射狭缝的结构,提出了四光路透镜成像系统,同时采用光纤传光。实验表明它提高了膜厚监的稳定性和精度,并有较高的性能价格比,此外从理论上对多光路透镜成像系统的设计和调校进行了定量分析。 相似文献