Applied Physics B

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Twisted clad microstructured optical fibers: revisited
Applied Physics B - Tập 117 - Trang 481-486 - 2014
M. A. Baqir, P. K. Choudhury
The paper discusses confinements corresponding to low-order sustained hybrid modes in twisted clad microstructured optical fiber with twists in the form of conducting sheath helix structure introduced at the core–clad interface and inclined at certain angles. Dispersion relations for such fiber structures are deduced under strict electromagnetic boundary conditions. Varying the angle of pitch (of ...... hiện toàn bộ
Comprehensive kinetic model for electron-beam-excited XeCs+ ionic excimers
Applied Physics B - Tập 60 - Trang 391-403 - 1995
J. L. Lawless, D. Lo
A theoretical model that accounts for fundamental plasma processes leading to the formation and decay of XeCs+ ionic excimers in high-pressure electron-beam-excited Ar/Xe/Cs mixtures was developed. Numerical calculations based on the model were performed. For atmospheric gas mixtures, the model predicts an intrinsic efficiency (energy stored in upper state/energy deposited) of 18%. Model calculati...... hiện toàn bộ
Influence of the 61 S 0–63 P 1 resonance on continuous Lyman-α generation in mercury
Applied Physics B - Tập 113 - Trang 559-566 - 2013
Daniel Kolbe, Martin Scheid, Jochen Walz
Continuous coherent radiation in the vacuum ultraviolet at 122 nm (Lyman-α) can be generated using sum-frequency mixing of three fundamental laser beams in mercury vapor. One of the fundamental beams is at 254 nm wavelength, which is close to the 61 S 0–63 P 1 resonance in mercury. Experiments have been...... hiện toàn bộ
Photoacoustic system for on-line process monitoring of hydrogen sulfide (H2S) concentration in natural gas streams
Applied Physics B - Tập 85 - Trang 315-321 - 2006
A. Varga, Z. Bozóki, M. Szakáll, G. Szabó
A dual-channel hydrogen sulfide (H2S) concentration measuring system based on photoacoustic spectroscopy is described. The system uses a single-mode, fiber-coupled, room-temperature-operated, telecommunication-type diode laser with a wavelength of 1574.5 nm and an output optical power of 40 mW and two identical resonant photoacoustic cells to achieve minimum detectable H2S concentration at 0.5 ppm...... hiện toàn bộ
Third and fifth harmonics generation in air and nanoparticle-containing plasmas using 150-kHz fiber laser
Applied Physics B - Tập 126 Số 5 - 2020
Ganjaboy S. Boltaev, Naveed A. Abbasi, Vyacheslav V. Kim, Mazhar Iqbal, Sharjeel Khan, A. I. Zvyagin, M. S. Smirnov, O. V. Ovchinnikov, R. A. Ganeev, A. S. Alnaser
Modeling for thermal conductivity measurements of thin films using photothermal deflection with obliquely crossed configuration
Applied Physics B - Tập 65 - Trang 403-409 - 1997
B.-C. Li, S.-Y. Zhang
Polarization-dependent coupling in a 1x4 waveguide array in lithium niobate fabricated by femtosecond pulses
Applied Physics B - Tập 89 - Trang 25-28 - 2007
Hongyun Chen, Xianfeng Chen, Yishuai Zhang, Yuxing Xia
We demonstrate a 1×4 waveguide array produced by an IR femtosecond laser in z-cut lithium niobate (LiNbO3). The polarization dependence of light coupling in this waveguide structure is experimentally investigated. The coupling constants of the waveguide array are obtained by measuring the ratio of output power of each waveguide for extraordinary rays and ordinary rays, and the variation of coupled...... hiện toàn bộ
Stress, absorptance and laser-induced damage threshold properties of 355-nm HR coatings
Applied Physics B - Tập 80 - Trang 1007-1010 - 2005
M. Zhan, Y. Zhao, G. Tian, H. He, J. Shao, Z. Fan
A number of 355-nm Al2O3/MgF2 high-reflectance (HR) coatings were prepared by electron-beam evaporation. The influences of the number of coating layers and deposition temperature on the 355-nm Al2O3/MgF2 HR coatings were investigated. The stress was measured by viewing the substrate deformation before and after coating deposition using an optical interferometer. The laser-induced damage threshold ...... hiện toàn bộ
Optically pumped14NH3 laser and its stark tuning at 10.78 μm
Applied Physics B - Tập 28 - Trang 55-62 - 1982
P. Pinson, G. Girard, M. Michon
Infrared (ir) emissions from a TEA-CO2-laser-pumped NH3 laser are reported. Superfluorescent emissions and selective single-line oscillations have been obtained in the range from 11 to 13 μm. The results make possible the design of a NH3 Stark cell allowing a 1 GHz shift of the 10.78 μm NH3 emission line.
Surface relief diffraction gratings written on β -BaB2O4 crystal by femtosecond pulses
Applied Physics B - - 2007
Y. Li, P. Lu, N. Dai, X. Wang, Y. Wang, B. Yu, H. Long
Surface relief diffraction gratings were written at the entrance surface of a β-BaB2O4 (BBO) crystal under irradiation with femtosecond laser pulses. Probe–beam diffraction and atomic force microscopy (AFM) were employed to characterize the diffraction properties and the microstructures of the gratings. The maximal first-order diffraction efficiency of these gratings is approximately 63%. The surf...... hiện toàn bộ
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