【摘 要】
:
A switchable microwave photonic filter (MPF) using a phase modulator (PM) and a silicon-on-insulator micro-ring resonator (MRR) is proposed and demonstrated. By adjusting the polarization controller between the PM and the MRR, the filtering function of th
【机 构】
:
KeyLaboratoryofRadarImagingandMicrowavePhotonics,MinistryofEducation,NanjingUniversityofAeronauticsa
【出 处】
:
ChineseOpticsLetters
论文部分内容阅读
A switchable microwave photonic filter (MPF) using a phase modulator (PM) and a silicon-on-insulator micro-ring resonator (MRR) is proposed and demonstrated. By adjusting the polarization controller between the PM and the MRR, the filtering function of the MPF can be switched between a band-stop filter and a band-pass filter. In a proof-of-concept experiment, an MPF with a rejection ratio of 30 dB (or 15 dB) for the band-stop (or band-pass) response and a frequency tuning range from 9.6 to 20.5 GHz is achieved.
其他文献
白光照明载频照相法能产生相当于剪切干涉的莫尔条纹,本文提出用色散棱镜进行条纹的假彩色编码,使得测量上更灵敏和视觉上更舒适.首先讨论了以有限口径成像产生莫尔剪切干涉的方法,然后分析了色散假彩色编码的原理并导出了相位折射角和编码色之间关系,最后给出了实验结果.
应用Pegg-Barnett位相理论研究了依赖强度耦合JC模型中场位相的动力学和统计性质.在一定条件下,场可展示锁相和位相压缩效应以及保持光子数-位相最小确定态.
We experimentally demonstrate all-optical clock recovery for 100 Gb/s return-to-zero on–off keying signals based on a monolithic dual-mode distributed Bragg reflector (DBR) laser, which can realize both mode spacing and wavelength tuning. By using a coher
针对SIFT算法的图像配准耗时长的问题,提出一种基于压缩感知的图像配准算法。首先,使用FAST算法提取图像角点,然后,使用SIFT算法生成角点描述子并使用压缩感知原理降维,最后,使用双向匹配算法进行匹配。通过实验数据分析,基于压缩感知的图像配准算法在图像配准准确度方面与传统SIFT算法、传统SURF算法、文献[16]算法、文献[17]算法、文献[18]算法相当,但在图像配准耗时方面分别缩短了71.
具有润湿功能的微纳结构表面因在生物工程、防覆冰等领域的潜在应用价值,近年来吸引了大量的关注,但亲水微纳结构表面的润湿不稳定性成为了其应用中的一大阻碍。本文通过飞秒激光直写的方式在不锈钢表面制备了具有亲水性质的微纳结构表面并研究其经一定时间跨度后润湿性变化规律及机制。研究表明,在表面化学成分方面,不锈钢微纳结构表面通过浸泡氢氧化钠溶液处理后可有效抑制其润湿变化。通过X射线光电子能谱分析表明,这是由于处理前后润湿机制发生转变导致的。从微纳形貌方面,当不锈钢表面粗糙度增加时,可以通过保持长效毛细效应实现较长时间
本文用缀饰原子本征态的方法,导出三原子体系合作共振荧光过程的主方程。求出了共振荧光的谱线结构,各谱线的权重比及各谱线的弛豫速率。文中报道了三原子共振荧光由七条谱线组成,每条谱线又有自己的精细结构。作者认为各谱线的分裂原因在于缀饰原子偶极矩之间的相互耦合。
We propose a new experimentally verified ghost imaging (GI) mechanism, derivative GI. Our innovation is that we use the derivatives of the intensities of the test light and the reference light for imaging. Experimental results show that by combining deriv
Small particle light scattering can produce light with polarization characteristics different from those of the incident beam. An analytical solution to the scattering by a spheroid with inclusion for an on-axis polarized Gaussian beam incidence is provid
Synchronization of chaotic vertical-cavity surface-emitting lasers (VCSELs) is achieved by external chaotic signal modulation successfully. Simulation indicates that we can get chaos synchronization if the intensity of external chaotic signal is large eno