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2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)最新文献

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500 nJ femtosecond fiber laser at 976 nm 976 nm的500 nJ飞秒光纤激光器
J. Lhermite, G. Machinet, C. Lecaplain, R. Royon, A. Hideur, É. Cormier
Yb-doped fibers pumped at 976 nm will naturally amplify radiation in the 1020–1080 nm spectral bandwidth. Alternatively, pumping at 915 nm allows producing emission at 976 nm under specific conditions exploiting the three-level operation [1]. Recently, an Yb-doped fiber laser delivering up to 94 W at 976 nm in the continuous-wave regime has been demonstrated [2, 3]. Based on a similar approach, a millijoule-class laser at 976 nm operating in the Q-switch regime with up to 70 W average power has been achieved [4].
在976 nm泵浦的掺镱光纤将自然地放大1020-1080 nm光谱带宽的辐射。或者,在特定条件下,利用三能级操作,在915 nm处泵送可以产生976 nm的发射[1]。最近,一种在976 nm连续波下输出高达94 W的掺镱光纤激光器已经被证明[2,3]。基于类似的方法,已经实现了976 nm的毫焦耳级激光器,在q开关状态下工作,平均功率高达70 W[4]。
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引用次数: 0
Novel ring resonator based biosensors 新型环形谐振器生物传感器
P. Bienstman, T. Claes, C. Lerma Arce, W. Bogaerts, K. Komorowska, D. van Thourhout
Label-free photonic biosensors can perform sensitive and quantitative multiparameter measurements on biological systems and can therefore contribute to major advances in medical analyses, food quality control, drug development and environmental monitoring. Additionally they offer the prospect of being incorporated in laboratories-on-a-chip that are capable of doing measurements at the point-of-care at an affordable cost. A crucial component in most of these photonic biosensors is a transducer that can transform a refractive index change in its environment to a measurable change in its optical transmission. Silicon-on-insulator is a material system with many assets for such transducers. First, it has a high refractive index contrast permitting very compact sensors of which many can be incorporated on a single chip, enabling multiplexed sensing. Second, silicon-on-insulator photonic chips can be made with CMOS-compatible process steps, allowing for a strong reduction of the chip cost by high volume fabrication. By using ring resonators with high quality factors that have very narrow resonance peaks, the smallest detectable spectral shift can be minimized.
无标签光子生物传感器可以对生物系统进行敏感和定量的多参数测量,因此可以在医学分析,食品质量控制,药物开发和环境监测方面取得重大进展。此外,它们提供了被纳入芯片实验室的前景,能够以负担得起的成本在护理点进行测量。在大多数这些光子生物传感器中,一个关键部件是一个换能器,它可以将其环境中的折射率变化转换为可测量的光传输变化。绝缘体上硅是一种具有许多资产的材料系统。首先,它具有高折射率对比度,允许非常紧凑的传感器,其中许多传感器可以集成在单个芯片上,从而实现多路传感。其次,绝缘体上硅光子芯片可以用cmos兼容的工艺步骤制造,从而通过大批量制造大大降低了芯片成本。通过使用具有非常窄的共振峰的高质量因子的环形谐振器,可以最小化最小的可检测光谱位移。
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引用次数: 1
Classical and quantum properties of cylindrically polarized beams of light via a Poincaré sphere representation 通过庞加莱球表示的圆柱偏振光束的经典和量子特性
A. Holleczek, A. Aiello, C. Gabriel, C. Marquardt, G. Leuchs
Cylindrically polarized modes (CPMs) of the electro-magnetic field represent very intriguing configurations of optical beams that exhibit complex non-uniform polarization patterns. Such vector beams possess several interesting features. On the fundamental side, there is a formal analogy to the quantum entangled Bell states [1] of two indistinguishable systems, with the difference that the CPMs are composed of distinguishable systems. On the application side, there is the possibility to be focused beyond the diffraction limit for linearly polarized light [2], underlining their potential impact on applications in lithography, confocal microscopy, optical trapping as well as material processing.
电磁场的圆柱极化模式(cpm)代表了非常有趣的光束结构,它表现出复杂的非均匀偏振模式。这种矢量光束具有几个有趣的特征。在基本方面,有一种形式类比于两个不可区分系统的量子纠缠贝尔态[1],不同之处在于cpm是由可区分系统组成的。在应用方面,线偏振光[2]有可能在超过衍射极限的情况下聚焦,这凸显了它们对光刻、共聚焦显微镜、光学捕获以及材料加工等应用的潜在影响。
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引用次数: 1
Quantum feedback for preparation and protection of quantum states of light 用于制备和保护光量子态的量子反馈
C. Sayrin, I. Dotsenko, S. Gleyzes, M. Brune, J. Raimond, S. Haroche
Aiming on the preparation of a given physical system in a particular quantum state, we can follow one of several standard approaches. The most straightforward one is to expose the system to a specific coherent evolution that will deterministically bring it into the desired final state. However, in case of microscopic few-particle systems this approach requires very good control of physical parameters at the single particle level. Another method of the state production is based on projective quantum measurements of the system: Quantum Mechanics postulates that the system is randomly projected onto one of the eigenstates of the measurement operator M. By a proper choice of M, the system can end up in the desired state after the measurement. Being less demanding this method is however inherently non-deterministic. To steer the system towards the target state and thus to overcome the randomness of the measurement, we propose to use an active feedback on the system while the measurement is being performed.
针对在特定量子态下制备给定物理系统,我们可以遵循几种标准方法中的一种。最直接的方法是将系统暴露于特定的连贯演变中,从而确定地将其带入期望的最终状态。然而,在微观少粒子系统的情况下,这种方法需要在单粒子水平上对物理参数进行非常好的控制。另一种状态产生的方法是基于系统的投影量子测量:量子力学假设系统被随机投影到测量算子M的特征态之一上,通过适当选择M,系统可以在测量后最终处于期望的状态。这种方法要求不高,但本质上是不确定的。为了将系统引导到目标状态,从而克服测量的随机性,我们建议在执行测量时对系统使用主动反馈。
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引用次数: 0
Reconfigurable nanostructured photonic metamaterials 可重构纳米结构光子超材料
J. Ou, E. Plum, Liudi Jiang, N. Zheludev
Here we introduce the first mechanically reconfigurable photonic metamaterials with tunable transmission and reflection characteristics provided by nanoscale movements of the components of the metamaterial structure. In the past control of electromagnetic response of metamaterials has only been possible in the terahertz part of the spectrum through micro-electro-mechanically activated motion.
在这里,我们介绍了第一个机械可重构的光子超材料,具有可调谐的透射和反射特性,提供了纳米级的超材料结构的组成部分的运动。在过去,超材料的电磁响应控制只能通过微机电激活运动在太赫兹频谱部分实现。
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引用次数: 0
High-power Ti:sapphire oscillator for a MHz EUV source 用于MHz极紫外光源的大功率钛蓝宝石振荡器
E. Seres, C. Spielmann
Time resolved x-ray pump-probe experiments are in the focus of the molecular and atomic physic. The kHz amplifier systems provide good quality short x-ray pulses for pump-probe measurements - but only a low signal/noise ratio due to the low rep rate. There is a demand for a small compact x-ray source with a good temporal resolution and with high repetition rate. A high power oscillator with a few MHz rep rate can solve the problem. An intra-cavity EUV source based on high harmonic generation (HHG) could deliver fs EUV pulses with high average power. The properly out-coupled EUV pulses can be used for spectroscopy, EUV frequency combs, and imaging and inspection of optical components for EUV lithography also [1–3].
时间分辨x射线泵浦探针实验是分子和原子物理学研究的热点。kHz放大器系统为泵浦探测测量提供高质量的短x射线脉冲,但由于低再现率,只有低信噪比。需要一种小型紧凑的x射线源,具有良好的时间分辨率和高重复率。一个具有几兆赫频率的高功率振荡器可以解决这个问题。一种基于高谐波产生的腔内极紫外光源能够以高平均功率输出5个极紫外光脉冲。适当的外耦合EUV脉冲可用于光谱学,EUV频率梳,以及EUV光刻光学元件的成像和检查[1-3]。
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引用次数: 0
Approaching cm/sec calibration of high resolution astronomical spectrograph 高分辨率天文光谱仪接近厘米/秒定标
A. Manescau, G. Lo Curto, L. Pasquini, J. G. González Hernández, R. Rebolo, T. Steinmetz, R. Probst, R. Holzwarth, T. Wilken, T. Hansch, T. Udem
Radial Velocity measurements have demonstrated to be the most successful way of finding extra solar planets; this technique has reported the larger quantity of exoplanet so far detected. Finding Earth like type exoplanets demands a cm/sec reproducible spectrograph calibration. A Laser Frequency Comb (LFC) calibration system [1], [2] has been developed and tested in several occasions with the HARPS spectrograph [3] at the 3.6m telescope on La Silla ESO Observatory since January 2009. The LFC shows a number of advantages compared to other traditional calibration sources [4].
径向速度测量已被证明是发现太阳系外行星最成功的方法;这项技术报道了迄今为止探测到的大量系外行星。寻找类地系外行星需要厘米/秒的可重复光谱仪校准。自2009年1月以来,激光频率梳(Laser Frequency Comb, LFC)校准系统[1],[2]已在La Silla ESO天文台3.6m望远镜上的HARPS光谱仪[3]上进行了多次测试。与其他传统校准源相比,LFC显示出许多优势[4]。
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引用次数: 1
Plasmonic properties of copper nanoparticles deposited on tilted fiber bragg gratings 倾斜光纤光栅上沉积铜纳米粒子的等离子体特性
L. Shao, J. P. Coyle, S. Barry, J. Albert
Surface plasmon resonance (SPR) sensors have been widely used in refractive-index related measurements, including label-free bio-chemical sensing, because of their high sensitivity and real-time detection capability. It is well established that noble metals, in particular, gold (Au) and silver (Ag), support plasmon resonances that can be tuned throughout the UV-vis-NIR region. However, the plasmonic properties of Cu have not received much attention as compared to Au and Ag because of oxidation of the Cu surfaces [1].
表面等离子体共振(SPR)传感器由于其高灵敏度和实时检测能力,已广泛应用于与折射率相关的测量,包括无标签生化传感。贵金属,特别是金(Au)和银(Ag),支持可以在整个UV-vis-NIR区域调谐的等离子体共振,这是公认的。然而,与Au和Ag相比,由于Cu表面的氧化,Cu的等离子体性质并没有受到太多的关注[1]。
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引用次数: 0
Bloch cavity solitons in an all-photonic crystal Fabry-Pérot cavity 全光子晶体法布里-普氏腔中的布洛赫腔孤子
R. Iliew, C. Etrich, K. Staliūnas, F. Lederer, O. Egorov
The growing interest in photonic crystals (PhCs) over the last years has led also to nonlinear applications, both with second-order and third-order nonlinearities. In PhCs the properties of light propagation can be tailored to a much wider extent than in homogeneous dielectrics. Recently an all-photonic crystal Fabry-Perot resonator was proposed, where the cavity and mirrors both comprise PhCs [1] (see structure shown in Fig. 1(a)). Because the interior PhC is operating in the subdiffractive regime, angle-independent linear transmission [1] and bistability were obtained [2]. Recently, in the case of a weak 2D periodic dielectric modulation, the peculiar properties of such a nonlinear resonator were used to obtain Bloch cavity solitons with novel properties [3]. Cavity solitons as self-localized nonlinear structures can be used as optical memory cells in future devices [4].
近年来,人们对光子晶体(PhCs)越来越感兴趣,这也导致了非线性的应用,包括二阶和三阶非线性。在PhCs中,光的传播特性可以被调整到比均匀介质更大的范围。最近提出了一种全光子晶体法布里-珀罗谐振器,其中腔和反射镜都由PhCs[1]组成(见图1(a)所示的结构)。由于内部PhC工作在亚衍射区,获得了与角度无关的线性传输[1]和双稳性[2]。最近,在弱二维周期介质调制的情况下,利用这种非线性谐振腔的特殊性质,获得了具有新性质[3]的布洛赫腔孤子。空腔孤子作为一种自定域非线性结构,可以在未来的器件[4]中用作光存储单元。
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引用次数: 0
Superconducting waveguides for terahertz quantum cascade lasers 太赫兹量子级联激光器的超导波导
M. Brandstetter, A. Benz, C. Deutsch, K. Unterrainer, P. Klang, H. Detz, W. Schrenk, A. M. Andrews, G. Strasser
Quantum cascade lasers (QCLs) are the only compact sources of coherent terahertz (THz) radiation. This spectral region is very interesting for various applications like spectroscopy or imaging. Up to now THz QCLs are operating in the regime between 1 and 5 THz. One of the advantages of QCLs is that the wavelength of the device can be tailored by the design of the active region. In addition the waveguide determines the optical properties and the performance of the QCL. A double-metal (DM) waveguide, where the THz radiation is guided in between two metal layers, provides low losses and high confinement of the optical mode. Besides Fabry-Perot cavities also disk- [1] and photonic crystal resonators [2] have been reported. The main reason for the waveguide losses is the absorption of the THz radiation by the metal layers [1].
量子级联激光器(qcl)是唯一紧凑的相干太赫兹(THz)辐射源。这个光谱区域对于光谱学或成像等各种应用都非常有趣。到目前为止,太赫兹量子激光器工作在1到5太赫兹之间。qcl的优点之一是器件的波长可以通过有源区域的设计来定制。此外,波导还决定了QCL的光学特性和性能。双金属(DM)波导,其中太赫兹辐射被引导在两个金属层之间,提供低损耗和高约束的光学模式。除了法布里-珀罗腔外,还报道了圆盘-[1]和光子晶体谐振腔[2]。波导损耗的主要原因是金属层对太赫兹辐射的吸收。
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引用次数: 0
期刊
2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC)
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