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2 ns pulses from a fibre laser mode-locked by carbon nanotubes 碳纳米管锁模光纤激光器的2ns脉冲
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5194703
E. Kelleher, J. Travers, Z. Sun, A. Rozhin, A. Ferrari, S. Popov, J. Taylor
{"title":"2 ns pulses from a fibre laser mode-locked by carbon nanotubes","authors":"E. Kelleher, J. Travers, Z. Sun, A. Rozhin, A. Ferrari, S. Popov, J. Taylor","doi":"10.1109/CLEOE-EQEC.2009.5194703","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5194703","url":null,"abstract":"We demonstrate strongly chirped pulses from mode-locked Yb fibre ring lasers with cavity lengths exceeding 1 km, in the presence of very high net normal dispersion, up to −36 ps nm-1. Mode-locking was achieved using a single wall carbon nanotube saturable absorber [1–3]. The output pulse durations exceed 2 ns, which is, to the best of our knowledge, the longest pulse duration produced from a mode-locked fibre laser. The long cavities allowed us to achieve sub 200 kHz repetition rates, about an order of magnitude lower than has been reported to date [4]. In the experiments reported here, no intentional spectral filtering was employed, despite the all-normally dispersive cavity. The lasing wavelength selection is therefore a result of overlap of the gain bandwidth and spectral loss profiles of the intracavity optical components, but may also be affected by a dynamic filtering effect of the saturable absorber.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127962318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High refractive index contrast ridge waveguides in LiNbO3 thin films LiNbO3薄膜高折射率对比脊波导
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5196502
H. Hu, R. Ricken, W. Sohler
{"title":"High refractive index contrast ridge waveguides in LiNbO3 thin films","authors":"H. Hu, R. Ricken, W. Sohler","doi":"10.1109/CLEOE-EQEC.2009.5196502","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5196502","url":null,"abstract":"Optical waveguides of high refractive index contrast enable small cross section dimensions and small bending radii of curved waveguides, a prerequisite for high density integrated optics [1]. For nonlinear optics in materials like lithium niobate (LiNbO3, LN) the resulting small mode size yields a high guided mode intensity increasing the efficiency of nonlinear interactions.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127962735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A petawatt beamline on SG-II-U laser system SG-II-U激光系统的千瓦光束线
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5196348
Tao Wang, Guang Xu, Ya-ping Dai, Zunqi Lin, Y. Gu, Jianqiang Zhu
{"title":"A petawatt beamline on SG-II-U laser system","authors":"Tao Wang, Guang Xu, Ya-ping Dai, Zunqi Lin, Y. Gu, Jianqiang Zhu","doi":"10.1109/CLEOE-EQEC.2009.5196348","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5196348","url":null,"abstract":"The high power Nd:glass laser driver of inertial confinement fusion (ICF), referred to as Shen Guang series[1], have been developed in China since 1981. At present, Shen Guang-II (SG-II) facility with an energy output of 6kJ/1ns at 1.053µm, has been playing an important role in laser fusion research. As the concept of fast ignition is getting more and more interesting, the upgrade program of SG-II facility (SG-II-U) has been implemented. A peta watt (PW) beam line, which will deliver 1kJ pulses with pulse duration near 1ps, is being set up.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127975197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Optical Bloch equations for light harvesting complexes: pump probe spectra and saturation dynamics at high light intensity excitation 光收集配合物的光学布洛赫方程:高光强激发下的泵浦探测光谱和饱和动力学
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5192700
Marten Richter, A. Carmele, T. Renger, A. Knorr
{"title":"Optical Bloch equations for light harvesting complexes: pump probe spectra and saturation dynamics at high light intensity excitation","authors":"Marten Richter, A. Carmele, T. Renger, A. Knorr","doi":"10.1109/CLEOE-EQEC.2009.5192700","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5192700","url":null,"abstract":"The light harvesting complex of photosystem II (LHC II) of green plants is the pigment-protein complex, that binds the majority of chlorophyll on earth. It transfers the excitation energy absorbed from solar radiation to the photosystem II core complex. The monomeric subunit of the trimeric LHC-II complex contains 14 coupled chlorophyll molecules, embedded in a protein matrix, which provides a vibronic bath for electronic excitations [1]. We focus on the regime of higher laser intensities, where theories that consider the optical field as a pertubation and treat the phonon-lineshape accurately[2] cannot be used . For this purpose Bloch equations are derived using the correlation expansion method [3]. They include the electron-vibron interactions (pigment-protein coupling), the electron-electron interaction caused by the Coulomb coupling between the different pigments [4] and the applied optical pulses. The different interactions leads to effects like formation of delocalized excited states, excitation relaxation, exciton-exciton annihilation as well as Pauli blocking. All parameters for the Bloch equations are independently determined: the Coulomb matrix elements from quantum chemical calculations [4], the spectral density of pigment-protein coupling from fluorescence line narrowing measurements [2]. To illustrate the application of Bloch equations for high pulse intensities, we focus on pump-probe spectra (Fig. 1 a)) and the fluorescence quantum yield: Fig. 1 a) shows the intensity dependence of the pump probe signal of LHC II. Interestingly, the transfer rate from chlorophyll b at 645 nm to chlorophylla at 680 nm was found to be almost unaffected by the intensity. Only the energy that is able to relax towards chlorophylls with lower site energies is reduced for higher intensities (see. Fig. 1 a)) due to Pauli blocking effects.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128177423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Processing of chalcogenide glass by the femtosecond laser pulses for achieving highly non-linear photonic structures 飞秒激光脉冲加工硫系玻璃实现高度非线性光子结构
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5191744
E. Romanova, A. Konyukhov, S. Muraviov, A. Andrianov, T. Benson, A. Seddon, D. Furniss
{"title":"Processing of chalcogenide glass by the femtosecond laser pulses for achieving highly non-linear photonic structures","authors":"E. Romanova, A. Konyukhov, S. Muraviov, A. Andrianov, T. Benson, A. Seddon, D. Furniss","doi":"10.1109/CLEOE-EQEC.2009.5191744","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5191744","url":null,"abstract":"The direct modification of materials by femtosecond (fs) laser pulses enables fabrication of 3D compact photonic devices, which are potentially cheap and allow for dense integration. In the writing of well-defined structures by such means non-linear processes are essential. Multi-photon absorption is an effect that initiates plasma formation in illuminated region and subsequent variation of its optical properties. Due to the non-linear character of absorption, sub-wavelength-scale (in particular, nano-scale) structures can be fabricated.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"1995 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128188184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stacked integrated double-disks for cavity optomechanics 用于腔光力学的堆叠集成双盘
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5192613
Q. Lin, Xiaoshun Jiang, M. Eichenfield, R. Camacho, K. Vahala, O. Painter
{"title":"Stacked integrated double-disks for cavity optomechanics","authors":"Q. Lin, Xiaoshun Jiang, M. Eichenfield, R. Camacho, K. Vahala, O. Painter","doi":"10.1109/CLEOE-EQEC.2009.5192613","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5192613","url":null,"abstract":"The coupling of mechanical oscillators and optical cavity modes through scattering forces has received considerable attention in recent years [1]. This interaction provides a way, through the principle of dynamic back action [2], to amplify [2,3] and cool mechanical motion [4–6]. It could also soon provide a practical means to entangle macroscopic mechanical motion with a variety of other quantum systems, including light [7,8]. To date, experimental work has relied upon the optical scattering force to create conditions necessary for observation of dynamical back action effects. However, alongside the scattering force there are also dipole optical forces that can furnish optomechanical coupling. These forces, also referred to as dispersive or gradient forces, have been used to control coupling of a waveguide to a resonator [9] and to couple pairs of waveguides [10,11]. In the present work, a stacked, double-disk whispering gallery system is demonstrated as a new means to cavity optomechanical phenomena. Dipole-force coupling between the disks creates optomechnical coupling, causing displacement of the disks and tuning of the underlying whispering gallery resonances. In comparison to scattering-force-based systems, this double-disk configuration has the significant advantage of providing a larger optomechanical coupling constant, independent of the cavity round trip length.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121729989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Superresolution without evanescent fields 无倏逝场的超分辨率
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5191658
F. Huang, T. Kao, N. Zheludev
{"title":"Superresolution without evanescent fields","authors":"F. Huang, T. Kao, N. Zheludev","doi":"10.1109/CLEOE-EQEC.2009.5191658","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5191658","url":null,"abstract":"The last decade has seen numerous efforts to achieve imaging resolution beyond that of the Abbe-Rayleigh diffraction limit. The main direction of research aiming to break this limit seeks to exploit the evanescent components containing fine detail of the electromagnetic field distribution at the immediate proximity of the object. Here we propose a solution that removes the need for evanescent fields. The object being imaged or stimulated with sub-wavelength accuracy does not need to be in the immediate proximity of the superlens or field concentrator: an optical mask can be designed that creates constructive interference of waves known as superoscillation, leading to a sub-wavelength focus of prescribed size and shape in a field of view beyond the evanescent fields, when illuminated by a monochromatic wave. We demonstrate that such a mask may be used not only as a focusing device, but also as a super-resolution imaging device.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132015337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Fabrication of Microlens by Nd:YVO4 laser irradiation of glass frit layers. Nd:YVO4激光辐照玻璃熔块层制备微透镜。
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5196468
D. Nieto, M. Flores-Arias, C. Gómez-reino
{"title":"Fabrication of Microlens by Nd:YVO4 laser irradiation of glass frit layers.","authors":"D. Nieto, M. Flores-Arias, C. Gómez-reino","doi":"10.1109/CLEOE-EQEC.2009.5196468","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5196468","url":null,"abstract":"Microlens array has a large field of applications: high-speed photography, telecommunication industry that couple light in and out optical fiber waveguides and optical communications, and bio-analysis are some examples [1]. Polymer materials have been widely employed due to low cost to fabricate economical microlens. Nevertheless glasses are much more suitable for high temperature applications or under stronger chemical environments. Moreover, glass materials present a lower UV absorption than polymers. This is an important advantage for bio-analysis applications. [2,3]","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132212033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Colloidal photonic hetero-crystals with controllable coupling 具有可控耦合的胶体光子异质晶体
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5191538
B. Ding, M. Bardosova, M. Pemble, U. Peschel, S. Romanov
{"title":"Colloidal photonic hetero-crystals with controllable coupling","authors":"B. Ding, M. Bardosova, M. Pemble, U. Peschel, S. Romanov","doi":"10.1109/CLEOE-EQEC.2009.5191538","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5191538","url":null,"abstract":"Functionality of photonic hetero-crystals is defined by the mechanism and details of the light coupling at the hetero-interface. The methods to change this coupling include (i) the mismatch of the photonic band structures of the hetero-crystal counterparts, (ii) embedding the resonator at the interface or (iii) adding the coupling/decoupling elements. One of peculiar properties of the photonic hetero-crystals is the support of the propagating evanescent surface waves at the interface. These surface states relate to the Tamm states at the surface of atomic crystals. In accord to theoretical modelling, the realisation of surface waves in photonic heterocrystals requires overlap of the photonic bandgaps on the both sides of the interface.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132222951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Time-evolving entanglement and violation of Bell inequalities using a quantum dot photon-pair emitter. 使用量子点光子对发射器的时间演化纠缠和贝尔不等式的违反。
CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference Pub Date : 2009-06-14 DOI: 10.1109/CLEOE-EQEC.2009.5194549
R. Stevenson, R. Young, A. J. Hudson, A. Bennett, C. Nicoll, D. Ritchie, A. Shields
{"title":"Time-evolving entanglement and violation of Bell inequalities using a quantum dot photon-pair emitter.","authors":"R. Stevenson, R. Young, A. J. Hudson, A. Bennett, C. Nicoll, D. Ritchie, A. Shields","doi":"10.1109/CLEOE-EQEC.2009.5194549","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2009.5194549","url":null,"abstract":"Polarization-entangled photons provide intriguing insight into the fundamentals of quantum physics, and are vital technology for large scale quantum computing with linear optics [1], and extending the distance over which a quantum key can be shared [2]. However, those entangled photon sources that have been implemented so far are typically probed using time-averaged measurements, thus obscuring any quantum correlations that evolve over the lifetime of the state.","PeriodicalId":346720,"journal":{"name":"CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132241967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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