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We proposed and demonstrated a new scheme for simultaneous generation of independent wired and wireless signals employing an integrated polarization multiplexing modulator. In the experimental system, a 10 Gb/s wired signal is imposed on the original optical carrier with one polarization, while a wireless signal with a bit rate larger than 4 Gb/s is carried on the generated mil

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We proposed a method to form a flat transmitted serrated-phase (SP) high-contrast-index subwavelength grating (HCG) beam splitter (HBS) for all dielectric materials, which is to alternately arrange two kinds of grating bars with a phase difference of π. Compared to the typical linear-phase (LP) HBS, which consists of two symmetrical deflecting gratings, the SP-HBS is extensibl

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Interaction of acoustic waves and microbubbles occurs in numerous biomedical applications including ultrasound imaging, drug delivery, lithotripsy treatment, and cell manipulation, wherein the acoustically driven microbubbles routinely act as active microscale oscillators or actuators. In contrast, microbubbles were utilized here as passive receivers to detect broadband ultraso

PDF全文 HTML全文 Photonics Research | 2020,8(10):1558-1565
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Heterogeneously integrated lasers in the O-band are a key component in realizing low-power optical interconnects for data centers and high-performance computing. Quantum-dot-based materials have been particularly appealing for light generation due to their ultralow lasing thresholds, small linewidth enhancement factor, and low sensitivity to reflections. Here, we present widely

PDF全文 HTML全文 Photonics Research | 2020,8(10):1551-1557
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太赫兹(THz)波对非极性材料有较好的穿透性,对生物医学组织无电离效应,因而非常适合无损检测、生物医学成像等应用。THz量子阱光电探测器(THz QWPs)具有响应速度快、响应率高、噪声等效功率低、体积小的特点。相较于其他探测器,THz QWPs作为成像系统接收器时,系统具有成像分辨率高、成像速度快、成像信噪比高、结构紧凑等优势。本文综述了基于THz QWPs的成像研究进展,并对成像系统核心指标的影响因素进行了

PDF全文 光电工程 | 2020,47(05):190667
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报道了应用准连续光抽运光子晶体光纤产生超连续谱时的一种现象,并根据调制不稳定和数值解薛定谔方程证明此现象为调制不稳定性.在实验中发现有两个波峰,与中心波长之间的距离分别为27.08 nm和32.72 nm,经过对比和分析数值结算和实验结果非常吻合,说明调制不稳定性在准连续光抽运光子晶体光纤产生超连续谱过程中起着重要的作用.

PDF全文 光子学报 | 2010,39(04):639
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In laser-pointing-related applications, when only the centroid of a laser spot is considered, then the position and angular errors of the laser beam are often coupled together. In this study, the decoupling of the position and angular errors is achieved from one single spot image by utilizing a neural network technique. In particular, the successful application of the neural ne

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用无狭缝红外光谱仪获得了山东地区云对地闪电回击过程的近红外光谱,并与可见光波长范围的闪电回击光谱进行了对比分析.根据近红外光谱的结构特征,讨论了闪电通道等离子体的光谱辐射顺序以及不同波段连续光谱的主要辐射机制,研究得出:可见光谱主要是闪电回击初期和发展阶段的辐射;近红外光谱主要是闪电发展后期的辐射;可见波段的连续光谱主要来自韧致辐射的贡献,而红外部分的连续光谱主要来自复合辐射的

PDF全文 光子学报 | 2010,39(06):998
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利用最小二乘拟合法分析了光子晶体的能带结构,定量分析了二维光子晶体的色散参量.为了考虑脉冲各频率的作用,通过引入与频率分量相关的权重因子,从而解析了群速度和平均群速度色散,进而解析出脉冲波络渐变的理论结果.通过FDTD数值模拟后,发现数值模拟结果与理论解析结果完全相吻合.本文处理光子晶体的色散参量的方法,为制作光子晶体色散器件如光子晶体色散补偿器、脉冲展宽和压缩器有一定的借鉴作用.

PDF全文 光子学报 | 2010,39(08):1505
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设计了一套无损检测光波沿人体经络传输特性的自动测量系统,测量808 nm光波沿人体经络及其周边非经络组织的漫射光强度,分析不同的激光输出功率对组织相对衰减率的影响.运用生物组织中光子传输理论的近似漫射法对实验结果进行分析,发现经络与周边非经络组织之间的光传输特性存在差异,这种差异性具有明显的医学统计意义(P<0.05).另外,还发现手厥阴心包经上的平均相对衰减因子比足太阴脾经小,可以得知,

PDF全文 光子学报 | 2010,39(s1):29
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