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Research Letters in Optics最新文献

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Pump Spectral Bandwidth, Birefringence, and Entanglement in Type-II Parametric Down Conversion 泵浦光谱带宽，双折射，和纠缠在ii型参数下转换
Research Letters in Optics Pub Date : 2009-07-26 DOI: 10.1155/2009/387580
D. Erenso
{"title":"Pump Spectral Bandwidth, Birefringence, and Entanglement in Type-II Parametric Down Conversion","authors":"D. Erenso","doi":"10.1155/2009/387580","DOIUrl":"https://doi.org/10.1155/2009/387580","url":null,"abstract":"The twin photons produced by a type-II spontaneous parametric down conversion are well know as a potential source of photons for quantum teleportation due to the strong entanglement in polarization. This strong entanglement in polarization, however, depends on the spectral composition of the pump photon and the nature of optical isotropy of the crystal. By exact numerical calculation of the concurrence, we have shown that how pump photons spectral width and the birefringence nature of the crystal directly affect the degree of polarization entanglement of the twin photons.","PeriodicalId":429008,"journal":{"name":"Research Letters in Optics","volume":"254 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121138030","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
Surface Plasmons and Surface Enhanced Raman Spectra of Aggregated and Alloyed Gold-Silver Nanoparticles 聚合和合金金-银纳米粒子的表面等离子体和表面增强拉曼光谱
Research Letters in Optics Pub Date : 2009-07-01 DOI: 10.1155/2009/475941
Y. Fleger, M. Rosenbluh
{"title":"Surface Plasmons and Surface Enhanced Raman Spectra of Aggregated and Alloyed Gold-Silver Nanoparticles","authors":"Y. Fleger, M. Rosenbluh","doi":"10.1155/2009/475941","DOIUrl":"https://doi.org/10.1155/2009/475941","url":null,"abstract":"Effects of size, morphology, and composition of gold and silver nanoparticles on surface plasmon resonance (SPR) and surface enhanced Raman spectroscopy (SERS) are studied with the purpose of optimizing SERS substrates. Various gold and silver films made by evaporation and subsequent annealing give different morphologies and compositions of nanoparticles and thus different position of the SPR peak. SERS measurements of 4-mercaptobenzoic acid obtained from these films reveal that the proximity of the SPR peak to the exciting laser wavelength is not the only factor leading to the highest Raman enhancement. Silver nanoparticles evaporated on top of larger gold nanoparticles show higher SERS than gold-silver alloyed nanoparticles, in spite of the fact that the SPR peak of alloyed nanoparticles is narrower and closer to the excitation wavelength. The highest Raman enhancement was obtained for substrates with a two-peak particle size distribution for excitation wavelengths close to the SPR.","PeriodicalId":429008,"journal":{"name":"Research Letters in Optics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130527222","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: 62
Optimization of Multiple Active Ion Doped Fiber Amplifiers for Three Communication Windows 3个通信窗口下多个有源掺离子光纤放大器的优化
Research Letters in Optics Pub Date : 2009-04-29 DOI: 10.1155/2009/276538
Chun Jiang, Li Jin
{"title":"Optimization of Multiple Active Ion Doped Fiber Amplifiers for Three Communication Windows","authors":"Chun Jiang, Li Jin","doi":"10.1155/2009/276538","DOIUrl":"https://doi.org/10.1155/2009/276538","url":null,"abstract":"We present for the first time a theoretical model of E r 3 + - T m 3 + - P r 3 + codoped fiber pumped with both 800 nm and 980 nm lasers to explore possibility of this co-doped system as all-wave fiber amplifier. The rate and power propagation equations of the model are solved numerically and the dependence of the gains at 1310, 1470, 1530, 1600, 1650 nm windows on fiber length is calculated. The results show that with pump power of 200 mW/200 mW, when the concentrations of P r 3 + , T m 3 + , E r 3 + are around 1 . 7 × 1 0 2 4 , 3 . 9 × 1 0 2 4 , 1 . 2 × 1 0 2 4 (ions/ m 3 ), respectively, the signals at 1310, 1470, 1530, 1600, 1650 nm may be nearly equally amplified with gain of 13–16.0 dB in the active fiber with length of 23.5 m; the co-doping concentrations and fiber length and pump powers may be further optimized to reduce the ripple.","PeriodicalId":429008,"journal":{"name":"Research Letters in Optics","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126357938","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: 3
Demonstration of an All-Optical 2-to-4 Level Encoder Based on an Optical Parametric Amplifier 基于光参量放大器的2- 4电平全光编码器的演示
Research Letters in Optics Pub Date : 2009-03-23 DOI: 10.1155/2009/981620
Yu Liang, P. C. Chui, K. Wong
{"title":"Demonstration of an All-Optical 2-to-4 Level Encoder Based on an Optical Parametric Amplifier","authors":"Yu Liang, P. C. Chui, K. Wong","doi":"10.1155/2009/981620","DOIUrl":"https://doi.org/10.1155/2009/981620","url":null,"abstract":"We demonstrated a novel technique for all-optical 2-to-4 level amplitude-shift keying (ASK) coding based on a fiber optical parametric amplifier. A 20-Gb/s signal is realized by multiplexing two 10-Gb/s data streams.","PeriodicalId":429008,"journal":{"name":"Research Letters in Optics","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127126374","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: 5
Analytical Structuring of Periodic and Regular Cascading Solutions in Self-Pulsing Lasers 自脉冲激光器中周期和规则级联解的解析结构
Research Letters in Optics Pub Date : 2008-09-29 DOI: 10.1155/2008/163937
B. Meziane, A. Aissani
{"title":"Analytical Structuring of Periodic and Regular Cascading Solutions in Self-Pulsing Lasers","authors":"B. Meziane, A. Aissani","doi":"10.1155/2008/163937","DOIUrl":"https://doi.org/10.1155/2008/163937","url":null,"abstract":"A newly proposed strong harmonic-expansion method is applied to the laser-Lorenz equations to analytically construct a few typical solutions, including the first few expansions of the well-known period-doubling cascade that characterizes the system in its self-pulsing regime of operation. These solutions are shown to evolve in accordance with the driving frequency of the permanent solution that we recently reported to illustrate the system. The procedure amounts to analytically construct the signal Fourier transform by applying an iterative algorithm that reconstitutes the first few terms of its development.","PeriodicalId":429008,"journal":{"name":"Research Letters in Optics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115816440","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
The Role of Fermi Resonance in Formation of Valence Band of Water Raman Scattering 费米共振在水拉曼散射价带形成中的作用
Research Letters in Optics Pub Date : 2008-06-18 DOI: 10.1155/2008/204828
S. Burikov, T. Dolenko, V. Fadeev
{"title":"The Role of Fermi Resonance in Formation of Valence Band of Water Raman Scattering","authors":"S. Burikov, T. Dolenko, V. Fadeev","doi":"10.1155/2008/204828","DOIUrl":"https://doi.org/10.1155/2008/204828","url":null,"abstract":"The role of Fermi resonance in formation of valence band of water Raman scattering was investigated. Simultaneous measurement of characteristics of bending and valence bands of water in D2O solutions, KBr, and KCl and using genetic algorithms in conjunction with variation methods allowed increasing accuracy of estimation of Fermi resonance coupling constant and of Fermi resonance contribution into formation of water Raman valence band.","PeriodicalId":429008,"journal":{"name":"Research Letters in Optics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125259669","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: 4
Influence of Even-Order Dispersion on Super-Sech Soliton Transmission Quality under Coherent Crosstalk 相干串扰下偶阶色散对超束孤子传输质量的影响
Research Letters in Optics Pub Date : 2008-05-07 DOI: 10.1155/2008/613986
A. Panajotovic, D. Milovic, A. Biswas, E. Zerrad
{"title":"Influence of Even-Order Dispersion on Super-Sech Soliton Transmission Quality under Coherent Crosstalk","authors":"A. Panajotovic, D. Milovic, A. Biswas, E. Zerrad","doi":"10.1155/2008/613986","DOIUrl":"https://doi.org/10.1155/2008/613986","url":null,"abstract":"The transmission speed of optical network strongly depends on the impact of higher order dispersion. In presence of coherent crosstalk, which cannot be otherwise controlled by optical filtering, the impact of higher order dispersions becomes more pronounced. In this paper, the general expressions, that describe pulse deformation due to second- and fourth-order dispersions in a single-mode fiber, are given. The responses for such even-order dispersions, in presence of coherent crosstalk, are characterized by waveforms with long trailing edges. The transmission quality of optical pulses, due to both individual and combined influence of second- and fourth-order dispersions, is studied in this paper. Finally, the pulse shape and eye diagrams are obtained.","PeriodicalId":429008,"journal":{"name":"Research Letters in Optics","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133350517","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: 4
Using Nonuniform Fiber to Generate Slow Light via SBS 利用非均匀光纤通过SBS产生慢光
Research Letters in Optics Pub Date : 2008-04-23 DOI: 10.1155/2008/253634
Wenhai Li, X. Bao, V. Kalosha, Liang Chen, Ming-Jun Li
{"title":"Using Nonuniform Fiber to Generate Slow Light via SBS","authors":"Wenhai Li, X. Bao, V. Kalosha, Liang Chen, Ming-Jun Li","doi":"10.1155/2008/253634","DOIUrl":"https://doi.org/10.1155/2008/253634","url":null,"abstract":"The data pulse delay based on slow light induced by stimulated Brillouin scattering (SBS) in a nonuniform dispersion decreasing fiber (DDF) is demonstrated experimentally, and the distortions of data pulses at different beat frequencies are studied. We found that a delay exceeding a pulse width can be achieved at particular beat frequency, and the DDF has larger delay versus gain slope coefficient with much better output pulse quality than single-mode fiber.","PeriodicalId":429008,"journal":{"name":"Research Letters in Optics","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116782417","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: 5
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