Results 271 to 280 of about 1,357,497 (310)
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Single-mode fiber measurements
IEEE Transactions on Instrumentation and Measurement, 1986In this invited tutorial review paper on single-mode fiber measurements, I discuss the various methods used to characterize the following important transmission parameters of single-mode fibers: attenuation, cut-off wavelength, mode-field diameter and chromatic dispersion.
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Polarization mode dispersion in a coil of single-mode fiber
Optics Letters, 1985Polarization mode dispersion resulting from lateral stress by bending is measured as a function of bending curvature. The magnitude of the modal dispersion is found to be 286 psec/km for a bending radius of 2.8 mm. The experimental result is in good agreement with that predicted theoretically for bulk material.
N, Shibata, M, Tsubokawa, S, Seikai
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Transverse-mode selection in single-longitudinal-mode lasers
Physical Review A, 1996In this paper we analyze the transverse pattern-forming characteristics of a two-level and single-longitudinalmode laser. The corrections to the classical empty cavity modes due to pumping and losses are specifically considered, leading to different excitation rates for the different transverse modes.
, Calderón +3 more
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Physical Review B, 1996
We calculate the self-consistent electronic structure of GaAs-${\mathrm{Al}}_{\mathit{x}}$${\mathrm{Ga}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$As split-gate quantum wires taking into account the ordering in the donor layer which occurs when the ionization fraction F is less than unity. Ordered ion distributions are generated via a Monte Carlo simulation
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We calculate the self-consistent electronic structure of GaAs-${\mathrm{Al}}_{\mathit{x}}$${\mathrm{Ga}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$As split-gate quantum wires taking into account the ordering in the donor layer which occurs when the ionization fraction F is less than unity. Ordered ion distributions are generated via a Monte Carlo simulation
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Chemically Etched Conical Microlenses for Coupling Single Mode Lasers into Single Mode Fibers
Topical Meeting on Integrated and Guided-Wave Optics, 1982Coupling efficiency between single mode laser diodes and single mode fibers can be greatly increased by using lensing schemes to match their respective modes. Various such schemes have been reported [1-8]. Among these, microlenses formed out of the fiber itself are solid and have stable optical properties.
G, Eisenstein, D, Vitello
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Couplings between Single-Mode Lasers and Single-Mode Fibers
1983This Symposium brief reports some preliminary results obtained in our laboratory in single-mode laser and single-mode fiber couplings, with a view to ascertaining a satisfactory coupling technique which possesses simultaneously a higher coupling efficiency and a weaker optical feedback.
Zhu Yan-nian, G. Wenke
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Distributed single-mode fiber to single-mode planar waveguide coupler
Journal of Lightwave Technology, 1993Light transfer between a curved single-mode fiber and a single-mode planar waveguide is investigated experimentally in dependence on the refractive index and thickness of the planar waveguide and for different polishing depths. Marcuse's model is applied to treat theoretically the coupler, leading to a very good agreement with the experimental results.
A.T. Andreev, K.P. Panajotov
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SPIE Proceedings, 2002
We compare various approaches aiming at large-area high-power single-mode oxidized VCSELs. Stable and reproducible single-mode emission with SMSR (side-mode suppression ratio) greater than 30dB and output powers well above 5mW are reported for the long monolithic cavity and self-aligned shallow surface etching approaches, both of which are suitable for
Heiko J. Unold +10 more
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We compare various approaches aiming at large-area high-power single-mode oxidized VCSELs. Stable and reproducible single-mode emission with SMSR (side-mode suppression ratio) greater than 30dB and output powers well above 5mW are reported for the long monolithic cavity and self-aligned shallow surface etching approaches, both of which are suitable for
Heiko J. Unold +10 more
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Microlenses for coupling single-mode fibers to single-mode thin-film waveguides
Applied Optics, 1980A new method has been devised for producing microlenses on the ends of single-mode optical fibers. A lens is formed by dipping the fiber end into a negative photoresist while the fiber core carries greater, similar0.1 mW of He-Ne laser light. The photoresist lenses require no developing or rinsing.
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Suppression of mode jumps in a single-mode fiber laser
Optics Letters, 1994A narrow-linewidth Nd3+-doped fiber laser is tuned by two cascaded Fabry–Perot filters. Mode jumps are suppressed by stabilization of both filters independently with respect to the oscillation frequency of the laser.
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