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Artículos de revistas sobre el tema "EFFECTIVE SINGLE MODE"

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Autor: Grafiati

Publicado: 11 de septiembre de 2023

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1

Lim, Yong Hui, Guoxian Tan y Song-Liang Chua. "Effective Single-mode Fibers with Large Mode Areas Through Intermodal-coupling". Procedia Engineering 140 (2016): 49–56. http://dx.doi.org/10.1016/j.proeng.2015.08.1118.

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2

Ademgil, Huseyin y Shyqyri Haxha. "Endlessly single mode photonic crystal fiber with improved effective mode area". Optics Communications 285, n.º 6 (marzo de 2012): 1514–18. http://dx.doi.org/10.1016/j.optcom.2011.10.067.

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3

Abi-Salloum, T. Y., J. Yablon, S. Tseng, M. Salit y M. S. Shahriar. "Effective dispersion in an inhomogeneously broadened single mode laser". Journal of Modern Optics 60, n.º 11 (1 de junio de 2013): 880–85. http://dx.doi.org/10.1080/09500340.2013.821533.

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4

Cancellieri, G. y A. Orfei. "Asymptotic effective cutoff condition in single-mode optical fibers". Journal of Lightwave Technology 5, n.º 2 (1987): 199–205. http://dx.doi.org/10.1109/jlt.1987.1075487.

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5

San Miguel, M., L. Pesquera, M. A. Rodriguez y A. Hernández-Machado. "Effective eigenvalue for the intensity correlations of single-mode and two-mode lasers". Physical Review A 35, n.º 1 (1 de enero de 1987): 208–17. http://dx.doi.org/10.1103/physreva.35.208.

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6

Jain, Deepak, Yongmin Jung, Jaesun Kim y Jayanta K. Sahu. "Robust single-mode all-solid multi-trench fiber with large effective mode area". Optics Letters 39, n.º 17 (28 de agosto de 2014): 5200. http://dx.doi.org/10.1364/ol.39.005200.

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7

Abdul Razak, Hanim. "An experimental analysis on the performance of single mode-multimode-single mode and multimode- single mode-multimode fiber optic sensor". Malaysian Journal of Fundamental and Applied Sciences 15, n.º 1 (4 de febrero de 2019): 80–84. http://dx.doi.org/10.11113/mjfas.v15n2019.1005.

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A cost effective and simple fabrication process for Mach Zehnder Interferometer (MZI) fiber based sensor has been proposed based on single mode-multimode-single mode structure and multimode-single mode-multimode. These proposed structures employed a standard fusion arc splicing by varying the length of sensing region instead of the structures. This sensor has been experimentally demonstrated for three different concentration of solutions such as water, 1mol sucrose solution and oil with the refractive index of 1.333, 1.384 and 1.464 respectively. Furthermore, the intention of this experiment is to determine which structure that provides superior performance in terms of the sensitivity of the device. The operating wavelength of different structures corresponds to the different refractive index. It is observed that the shifting response was influenced by the length of the sensing-area and the best sensitivity achieved for is -10.45nm/RIU.

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8

Huang, Liangjin, Tianfu Yao, Binhua Yang, Jinyong Leng, Pu Zhou, Zhiyong Pan, Shaoyi Gu y Xiang ai Cheng. "Modified Single Trench Fiber With Effective Single-Mode Operation for High-Power Application". IEEE Journal of Selected Topics in Quantum Electronics 24, n.º 3 (mayo de 2018): 1–9. http://dx.doi.org/10.1109/jstqe.2017.2770099.

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9

Yang, Shuai, Xinzhi Sheng, Guozhong Zhao, Shuqin Lou y Jiaoyan Guo. "3D Printed Effective Single-Mode Terahertz Antiresonant Hollow Core Fiber". IEEE Access 9 (2021): 29599–608. http://dx.doi.org/10.1109/access.2021.3059782.

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10

Pérez-Ríos, Jesús y Sherwin T. Love. "Effective single photon decay mode of positronium via electroweak interactions". Journal of Physics B: Atomic, Molecular and Optical Physics 48, n.º 24 (3 de noviembre de 2015): 244009. http://dx.doi.org/10.1088/0953-4075/48/24/244009.

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11

Jung, Yongmin, Gilberto Brambilla y David J. Richardson. "Comparative study of the effective single mode operational bandwidth in sub-wavelength optical wires and conventional single-mode fibers". Optics Express 17, n.º 19 (2 de septiembre de 2009): 16619. http://dx.doi.org/10.1364/oe.17.016619.

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12

Salih, Aqeel R. "Design of Single Mode Fiber for Optical Communications". Ibn AL- Haitham Journal For Pure and Applied Sciences 33, n.º 1 (20 de enero de 2020): 40. http://dx.doi.org/10.30526/33.1.2373.

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In this work, a step-index fiber with core index and cladding index has been designed. Single-mode operation can be obtained by using a fiber with core diameters 4–13 µm operating at a wavelength of 1.31 µm and by 4–15 µm at 1.55 µm. The fundamental fiber mode properties such as phase constant, effective refractive index, mode radius, effective mode area and the power in the core were calculated. Distributions of the intensity and the amplitude were shown.

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13

YANG XIAO-XUE, GAO KE-LIN y WU YING. "EFFECTIVE TWO-MODE RAMAN THEORY FOR A SINGLE ATOM OR ION". Acta Physica Sinica 46, n.º 7 (1997): 1282. http://dx.doi.org/10.7498/aps.46.1282.

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14

Shah, V. "Curvature dependence of the effective cutoff wavelength in single-mode fibers". Journal of Lightwave Technology 5, n.º 1 (1987): 35–43. http://dx.doi.org/10.1109/jlt.1987.1075395.

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15

Kumar, Naveen. "All-fiber interferometric technique for estimating the mode effective index of a single-mode fiber". Optical Engineering 45, n.º 1 (1 de enero de 2006): 015004. http://dx.doi.org/10.1117/1.2150475.

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16

Limpert, Jens, Fabian Stutzki, Florian Jansen, Hans-Jürgen Otto, Tino Eidam, Cesar Jauregui y Andreas Tünnermann. "Yb-doped large-pitch fibres: effective single-mode operation based on higher-order mode delocalisation". Light: Science & Applications 1, n.º 4 (abril de 2012): e8-e8. http://dx.doi.org/10.1038/lsa.2012.8.

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17

Abdel-Hafez, A. M. "Single-mode and two-mode squeezing in the three-level atom". Canadian Journal of Physics 70, n.º 5 (1 de mayo de 1992): 379–82. http://dx.doi.org/10.1139/p92-063.

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We investigate the phenomena of single-mode and two-mode squeezing for a three-level atom and two modes. The field modes are initially taken in coherent states. The effects of detuning on these phenomena are studied for one-photon and two-photon interactions. The relation between the collapse and revival phenomena and single-mode and two-mode squeezing is shown. It is found that the two-mode squeezing is much more effective than the single-mode squeezing for the one-photon interaction. While for the two-photon interaction the reverse is true.

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18

SHIZUYA, K. "SINGLE-MODE APPROXIMATION AND EFFECTIVE CHERN–SIMONS THEORIES FOR QUANTUM HALL SYSTEMS". International Journal of Modern Physics B 17, n.º 31n32 (30 de diciembre de 2003): 5875–91. http://dx.doi.org/10.1142/s0217979203023446.

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A unified description of elementary and collective excitations in quantum Hall systems is presented within the single-mode approximation (SMA) framework, with emphasis on revealing an intimate link with Chern–Simons theories. It is shown that for a wide class of quantum Hall systems the SMA in general yields, as an effective theory, a variant of the bosonic Chern–Simons theory. For single-layer systems the effective theory agrees with the standard Chern–Simons theory at long wavelengths whereas substantial deviations arise for collective excitations in bilayer systems. It is suggested, in particular, that Hall-drag experiments would be a good place to detect out-of-phase collective excitations inherent to bilayer systems. It is also shown that the intra-Landau-level modes bear a similarity in structure (though not in scale) to the inter-Landau-level modes, and its implications on the composite-fermion and composite-boson theories are discussed.

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19

Yang, Baolai, Peng Wang, Hanwei Zhang, Xiaoming Xi, Chen Shi, Xiaolin Wang y Xiaojun Xu. "6 kW single mode monolithic fiber laser enabled by effective mitigation of the transverse mode instability". Optics Express 29, n.º 17 (2 de agosto de 2021): 26366. http://dx.doi.org/10.1364/oe.433630.

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20

Saini, Than Singh, Ajeet Kumar y Ravindra Kumar Sinha. "Asymmetric large-mode-area photonic crystal fiber structure with effective single-mode operation: design and analysis". Applied Optics 55, n.º 9 (16 de marzo de 2016): 2306. http://dx.doi.org/10.1364/ao.55.002306.

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21

Ming-Jun Li, Xin Chen, Anping Liu, S. Gray, Ji Wang, D. T. Walton y L. A. Zenteno. "Limit of Effective Area for Single-Mode Operation in Step-Index Large Mode Area Laser Fibers". Journal of Lightwave Technology 27, n.º 15 (agosto de 2009): 3010–16. http://dx.doi.org/10.1109/jlt.2009.2020682.

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22

Vukovic, N., N. Healy y A. C. Peacock. "Guiding properties of large mode area silicon microstructured fibers: a route to effective single mode operation". Journal of the Optical Society of America B 28, n.º 6 (24 de mayo de 2011): 1529. http://dx.doi.org/10.1364/josab.28.001529.

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23

Cancellieri, G. y A. Orfei. "Discussion on the effective cut-off wavelength of the LP11 mode in single-mode optical fibres". Optics Communications 55, n.º 5 (octubre de 1985): 311–15. http://dx.doi.org/10.1016/0030-4018(85)90176-2.

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24

Shortiss, Kevin, Maryam Shayesteh, William Cotter, Alison Perrott, Mohamad Dernaika y Frank Peters. "Mode Suppression in Injection Locked Multi-Mode and Single-Mode Lasers for Optical Demultiplexing". Photonics 6, n.º 1 (8 de marzo de 2019): 27. http://dx.doi.org/10.3390/photonics6010027.

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Optical injection locking has been demonstrated as an effective filter for optical communications. These optical filters have advantages over conventional passive filters, as they can be used on active material, allowing them to be monolithically integrated onto an optical circuit. We present an experimental and theoretical study of the optical suppression in injection locked Fabry–Pérot and slotted Fabry–Pérot lasers. We consider both single frequency and optical comb injection. Our model is then used to demonstrate that improving the Q factor of devices increases the suppression obtained when injecting optical combs. We show that increasing the Q factor while fixing the device pump rate relative to threshold causes the locking range of these demultiplexers to asymptotically approach a constant value.

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25

Frigerio, Massimo, Stefano Olivares y Matteo G. A. Paris. "Cost-effective estimation of single-mode thermal states by probabilistic quantum metrology". Quantum Science and Technology 7, n.º 3 (20 de mayo de 2022): 035011. http://dx.doi.org/10.1088/2058-9565/ac6dfe.

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Abstract In probabilistic quantum metrology, one aims at finding measurements that concentrate the Fisher information on the resulting conditional quantum states, i.e. those states post-selected according to the outcome of the measurement. The quantum Cramér–Rao (QCR) bound itself cannot be surpassed this way, but it could be possible to improve the information-cost ratio (where cost refers to the experimental implementation), or even the total Fisher information. In this paper, we propose a post-selection protocol achieving this goal using single-photon subtraction and thermal states of radiation. In particular, we achieve a larger information-cost ratio for the estimation of temperature than the strategy attaining the QCR bound. Our scheme involves only classical states of radiation and this contrasts with (but does not contradict) recent results proving that for unitary quantum statistical models, post-selection strategies can outperform direct protocols only exploiting nonclassical states.

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26

Cai, Y., T. Mizumoto, E. Ikegami y Y. Naito. "An effective method for coupling single-mode fiber to thin-film waveguide". Journal of Lightwave Technology 9, n.º 5 (mayo de 1991): 577–83. http://dx.doi.org/10.1109/50.79533.

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27

Li, Qi, Fengping Yan, Wanjing Peng, Ting Feng, Suchun Feng, Siyu Tan, Peng Liu y Wenhua Ren. "DFB laser based on single mode large effective area heavy concentration EDF". Optics Express 20, n.º 21 (1 de octubre de 2012): 23684. http://dx.doi.org/10.1364/oe.20.023684.

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28

Franzen, D. "Determining the effective cutoff wavelength of single-mode fibers: An interlaboratory comparison". Journal of Lightwave Technology 3, n.º 1 (1985): 128–34. http://dx.doi.org/10.1109/jlt.1985.1074147.

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29

Urquhart, W. P. y P. J. Laybourn. "Effective core area for stimulated Raman scattering in single-mode optical fibres". IEE Proceedings J Optoelectronics 132, n.º 4 (1985): 201. http://dx.doi.org/10.1049/ip-j.1985.0044.

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30

Makouei, S. y F. Makouei. "Strain Effect Study on Mode Field Diameter and Effective Area of WII Type Single Mode Optical Fiber". Advanced Electromagnetics 5, n.º 1 (2 de mayo de 2016): 53. http://dx.doi.org/10.7716/aem.v5i1.362.

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In this article, the effect of strain on mode field diameter (MFD) and effective area (Aeff) in a modern multilayer WII type single mode optical fiber is investigated. The modal analysis of the fiber structure is based on linear polarized (LP) approximation method. The simulation results depict that both mode field diameter and effective area grow as a result of increment in tensile strain. The overall effect is observed in a slight rise in quality factor (Qf) of the fiber. Likewise, enlargement in amplitude of compressive strain leads to decrement in MFD and Aeff. However, among the optical and geometrical parameters of the fiber structure, Δ has the most considerable impact on both MFD and Aeff variation whilst R1 shows the least effect. In other words, any shift in the value allocated to Δ results in substantial change in the MFD and Aeff alteration due to strain. To eliminate this effect, the higher amounts for Δ are preferable which is related to the layering structure of the WII type optical fiber.

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31

Qin, F. F., G. Y. Zhu, J. B. Yang, L. Wei, Q. N. Cui y Y. J. Wang. "Unidirectional single-mode lasing realization and temperature-induced mode switching in asymmetric GaN coupled cavities". Nanoscale 14, n.º 5 (2022): 1921–28. http://dx.doi.org/10.1039/d1nr07203j.

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32

Bayuwati, D., T. B. Waluyo y I. Mulyanto. "Determination of the effective cut-off wavelength of several single-mode fiber patchcords". Journal of Physics: Conference Series 985 (marzo de 2018): 012002. http://dx.doi.org/10.1088/1742-6596/985/1/012002.

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33

Ding, Libo, Bangyi Li y Suling Feng. "Research on Multiprincipals Selecting Effective Agency Mode in the Student Loan System". Mathematical Problems in Engineering 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/835254.

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An effective agency mode is the key to solve incentive problems in Chinese student loan system. Principal-agent frameworks are considered in which two principals share one common agent that is performing one single task but each prefers the different aspect of the task. Three models are built and decision mechanisms are given. The studies show that the three modes have different effects. Exclusive dealing mode is not good for long-term effect because sometimes it guides agent ignoring repayment. If effort proportionality coefficient and observability are both unchanged, principals all prefer common agency, but independent contracting mode may be more efficient in reality because not only the total outputs under that mode are larger than those under cooperation one, but also preferring independent contracting mode can stimulate the bank participating in the game.

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34

Duan, Jin Yan, Jian Wang, Bing Zhang y Yi Tao Ren. "Optimizing Design of a Single-Mode Optical Rib Waveguide". Advanced Materials Research 710 (junio de 2013): 464–68. http://dx.doi.org/10.4028/www.scientific.net/amr.710.464.

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The modal characteristics of the optical rib waveguides are analyzed systematically based on the effective index method (EIM) and the improved normalized eigen equations of the waveguides are obtained by defined normalized parameters, which the thickness of the outer slab and the normalized outer ridge height of the waveguides are used as parameters in the single-mode condition. The achieved expressions are simpler and easier to optimize the structure parameters in designing a single-mode rib waveguide.

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35

Wang, Hong Mei y Hou Sheng Zhang. "Quasi-Sliding Mode Control for Single Inverted Pendulum System". Advanced Materials Research 433-440 (enero de 2012): 3181–85. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.3181.

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Inverted pendulum system is a nonlinear, coupling, multi-variable and unstable system. Because the inverted pendulum system exists all kinds of disturbs inevitably, the states have errors and the accuracy of control drops. In this paper, quasi-sliding mode control is used to achieve optimal control. First, the state-space model of the system is created by force analysis. Then, in the design of the controller, we make use of the sliding mode control, which has the advantage of anti-interference. To reduce the chattering phenomenon, we utilize saturation function in the reaching low design. The simulation results show the effective of the method

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36

SMOLYAKOV, MIKHAIL N. y IGOR P. VOLOBUEV. "SINGLE-BRANE WORLD WITH STABILIZED EXTRA DIMENSION". International Journal of Modern Physics A 23, n.º 05 (20 de febrero de 2008): 761–75. http://dx.doi.org/10.1142/s0217751x08038196.

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We present a model describing a single brane with tension embedded into a five-dimensional space–time with compact extra dimension, which can be easily stabilized. We examine the linearized gravity in the model and obtain an expression for the four-dimensional Planck mass on the brane in terms of the model parameters. It is also shown that the scalar sector of the effective four-dimensional theory contains a tachyonic mode, and we discuss the problem of stability of the model.

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37

Rosa, Lorenzo, Federico Melli y Luca Vincetti. "Analytical Formulas for Dispersion and Effective Area in Hollow-Core Tube Lattice Fibers". Fibers 9, n.º 10 (23 de septiembre de 2021): 58. http://dx.doi.org/10.3390/fib9100058.

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In this work, we propose analytical formulas for the estimation of dispersion properties and effective area of the fundamental mode of hollow-core inhibited coupling fibers with a microstructured cladding composed by a ring of dielectric tubes. The formulas are based on a model which has already been successfully applied to the estimation of confinement loss. The model takes into account the effects of the coupling of the fundamental core mode with the cladding modes in the context of the single-tube approximation. Effective index, group velocity dispersion, and effective area of the fundamental mode are estimated and compared with the results obtained from numerical simulations, by considering ten different fibers. The comparison shows a good accuracy of the proposed formulas, which do not require any tuning of fitting parameters. On the basis of the analysis carried out, a scaling law relating the effective area to the core radius is also given. Finally, the formulas give a good estimation of the same parameters of other Hollow-core inhibited coupling fibers, such as nested, ice-cream, and kagome fibers.

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38

Wang, Jin Chang, Lei Zhang y Jia Min Zhang. "Cohesive Cracking Simulation of Concrete Using Effective Modulus". Applied Mechanics and Materials 178-181 (mayo de 2012): 1503–8. http://dx.doi.org/10.4028/www.scientific.net/amm.178-181.1503.

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The research methods of Cohesive Zone Model (CZM) are introduced and the parameters of cohesive zone model in ABAQUS software are calibrated based on the cohesive constitutive model determined by the fracture energy. Besides adopting exponential cohesive zone model, this paper applies a bilinear one to simulate the crack propagation of a simply supported single-edge notched concrete beams SE(B) (Mode I) and make comparisons with experimental result. Finally, the results represent effectiveness of the effective modulus and the special advantage in term of failure of fracture based on the cohesive zone model, which is of directly guiding significance for achieving a deep going understanding of crack propagation.

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39

Gut, K. y Z. Opilski. "Spectropolarimetric analyses of optical single mode SU8 waveguide layers". Bulletin of the Polish Academy of Sciences Technical Sciences 63, n.º 2 (1 de junio de 2015): 349–52. http://dx.doi.org/10.1515/bpasts-2015-0038.

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Abstract The paper presents the principle of the operation of a spectropolarimetric interferometer. In a planar waveguide orthogonal modes of the TE and TM types can be excited for the entire visible light. During the propagation the difference of the phases between the modes was determined, which is the function of the length of the path of propagation, the difference of the effective refractive index (NTM-NTE) and the wavelength. At the output of this system the spectral distribution of intensity was recorded, the shape of which depends on the value of the refractive index of the cover of the waveguides

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40

Ramadan, Tarek A. "A RECURRENCE TECHNIQUE FOR COMPUTING THE EFFECTIVE INDEXES OF THE GUIDED MODES OF COUPLED SINGLE-MODE WAVEGUIDES". Progress In Electromagnetics Research M 4 (2008): 33–46. http://dx.doi.org/10.2528/pierm08063005.

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41

Ramadan, Tarek. "A RECURRENCE TECHNIQUE FOR COMPUTING THE EFFECTIVE INDEXES OF THE GUIDED MODES OF COUPLED SINGLE-MODE WAVEGUIDES". International Conference on Aerospace Sciences and Aviation Technology 12, ASAT CONFERENCE (1 de mayo de 2007): 1–7. http://dx.doi.org/10.21608/asat.2007.24006.

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42

Manjari Padhan, Aneeta, Sugato Hajra, Manisha Sahu, Sanjib Nayak, Hoe Joon Kim y Perumal Alagarsamy. "Single-electrode mode TENG using ferromagnetic NiO-Ti based nanocomposite for effective energy harvesting". Materials Letters 312 (abril de 2022): 131644. http://dx.doi.org/10.1016/j.matlet.2021.131644.

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43

Islam, Md Asiful y M. Shah Alam. "Bend-insensitive single-mode photonic crystal fiber with ultralarge effective area for dual applications". Optical Engineering 52, n.º 5 (9 de mayo de 2013): 050501. http://dx.doi.org/10.1117/1.oe.52.5.050501.

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44

Lu, Ning. "Photon statistics in a single-mode two-photon laser: Exact versus effective interaction hamiltonian". Optics Communications 77, n.º 2-3 (junio de 1990): 203–9. http://dx.doi.org/10.1016/0030-4018(90)90435-v.

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45

Kishor, Kamal, R. K. Sinha y Anshu D. Varshney. "Experimental verification of improved effective index method for endlessly single mode photonic crystal fiber". Optics and Lasers in Engineering 50, n.º 2 (febrero de 2012): 182–86. http://dx.doi.org/10.1016/j.optlaseng.2011.09.008.

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46

Ghafoori-Shiraz, H. "Effective refractive index and single-transverse mode condition in InGaAsP/InP BH laser diodes". Microwave and Optical Technology Letters 1, n.º 7 (septiembre de 1988): 262–65. http://dx.doi.org/10.1002/mop.4650010712.

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47

Feng, Xian, Joanne C. Flanagan, Ken E. Frampton, Periklis Petropoulos, Nicholas M. White, Jonathan H. V. Price, Wei H. Loh, Harvey N. Rutt y David J. Richardson. "Developing Single-Mode Tellurite Glass Holey Fiber for Infrared Nonlinear Applications". Advances in Science and Technology 55 (septiembre de 2008): 108–17. http://dx.doi.org/10.4028/www.scientific.net/ast.55.108.

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We review our progress in developing single-mode tellurite glass holey fiber for infrared nonlinear applications. Tellurite glass preforms with complex holey structure were fabricated by using glass extrusion technique. The fabrication of single-mode tellurite holey fibers with the effective mode area ranging from 2.6-3000mm2 and the effective nonlinearity γ ranging from 0.23- 280W-1km-1 were demonstrated. By controlling the microstructured features in the holey cladding, the dispersion profile and the zero dispersion wavelength of this type of single-material optical fiber were tailored within a broad range. Broadband supercontinuum spectra from 0.9 to 2.5mm were generated from the fabricated fibers by using femtosecond laser. Attenuations due to the impurities, such as transition metal ions, rare-earth ions and hydroxyl groups, were also investigated in the bulk tellurite glass and fiber from visible to mid-infrared regimes.

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48

Gao, Yuee, Xin Zou, Rujia Chen, Yanli Ma, Chengjiang Li y Yaping Zhang. "Freight Mode Coordination in China: From the Perspective of Regional Differences". Sustainability 12, n.º 7 (8 de abril de 2020): 2996. http://dx.doi.org/10.3390/su12072996.

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Studying the coordination of varied freight modes from the perspective of geographic regions is conducive to understanding the regional differences, and this can provide effective countermeasures and suggestions for the sustainable and coordinated development of freight transport. To reflect on the effects of regional differences in the coordination of freight modes, we divided China into four regions: The East, Central, West, and Northeast. We examined freight mode coordination in terms of region and analysed the coordination of freight modes from three aspects: one within a single freight mode system, between varied freight modes, and among freight modes and the economy in different regions. We selected 19 freight indexes based on China’s freight data from 2008 to 2017, and determined the relationship between the freight index and economic index gross domestic product (GDP) growth rate by means of stability, co-integration, and the Granger causality test. The coordination models within a single freight mode and among varied freight modes were established, and we conducted spatial autocorrelation between the freight mode and the economy. The results demonstrated that in the four regions of China, the single-freight mode had coordination of over 0.80; the coordination between waterway and aviation freight transport was over 0.83; and the coordination of varied freight modes in the Eastern region exceeded 0.78, with good overall coordination. Among the four regions, the spatial correlation between the Eastern and Western regions was not significant, while the correlation between the Central and Northeast regions was significant. The model and analysis methods established in this study were feasible and effective. In view of the universality of the model, it can be easily applied and generalized in or out of China.

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Putra, Zico Pratama, Deni Setiawan, Bagus Priambodo y Mila Desi Anasanti. "Point Estimation with Markers for Effective Mobile Auditory Graphs". International Journal of Emerging Technologies in Learning (iJET) 15, n.º 08 (24 de abril de 2020): 116. http://dx.doi.org/10.3991/ijet.v15i08.12347.

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While researchers have performed numerous studies to understand the human interpretation of visual graphs in reading, comprehending and interpreting displayed data; visually impaired (VI) students still face many challenges that prevent them from fully benefiting from these graphs in class. In this study, we conducted a test with 20 students to track the work described in studies in an expanded scenario. As we have tried to answer the question as to whether adding multi-reference mapping of sonification to auditory graphs could improve the of point estimation accuracy in non-visual condition. We also emphasize the efficiency of the performance of multi-reference graphs to make them as efficient as mapping using single pitch. Our proposed study improved performance of multi-reference task completion time by having fewer reference note. The results help provide empirical evidence that the multi-reference mode provides more accurate results than the single-pitch mode and confirms that adding contexts to auditory graphs could be used for better comprehension.

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50

Sun, Dong y F. Xiaolun Shi Yunhui Liu. "Adaptive Learning Control for Cooperation of Two Robots Manipulating a Rigid Object with Model Uncertainties". Robotica 14, n.º 4 (julio de 1996): 365–73. http://dx.doi.org/10.1017/s0263574700019755.

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SUMMARYIn this paper, an adaptive learning (A-L) control scheme is proposed for cooperation of two manipulators handling a rigid object with model uncertainties. For robots performing repetitive cooperating tasks, their operations are decomposed into two modes: the single operational mode and the repetitive operational mode on which the A-L controller is based. In the single operational mode, the controller is a learning based adaptive controller in which the robotic parameters are updated by using the information of the previous operation. In the repetitive operational mode, the controller is a model-based iterative learning controller. The advantages of the A-L controller lie in the fact that it can improve the transient performance as robots repeat operations at a high speed of the learning convergence. Simulation results ascertain that the A-L algorithm is effective in controlling two cooperated robots with model uncertainties.

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