Results 81 to 90 of about 65,580 (195)

Seidel's long exact sequence on Calabi-Yau manifolds

open access: yes, 2010
In this paper, we generalize construction of Seidel's long exact sequence of Lagrangian Floer cohomology to that of compact Lagrangian submanifolds with vanishing Malsov class on general Calabi-Yau manifolds.
OH, Yong-Geun
core   +1 more source

Tilted Gaussian Beams Multiplexer for Graded-Index Multimode Fiber in Data-Centers Interconnections

open access: yesIEEE Photonics Journal, 2015
In recent years, there has been an explosive growth of data traffic in data-center interconnections. A significant amount of the installations within data centers are graded-index multimode fibers (GI-MMFs).
N. Sheffi, D. Sadot
doaj   +1 more source

Accurate Modeling and Design of Graded-Index Fiber Probes for Optical Coherence Tomography Using the Beam Propagation Method

open access: yesIEEE Photonics Journal, 2013
Fiber-optic probes for sensing and biomedical imaging applications such as optical coherence tomography (OCT) frequently employ sections of graded-index (GRIN) fiber to re-focus the diverging light from the delivery fiber.
D. Lorenser, X. Yang, D. D. Sampson
doaj   +1 more source

Observation of Visible Upconversion Luminescence of Soft Glass Multimode Fibers

open access: yesFibers
This research investigates the visible upconversion luminescence which is induced by multiphoton absorption of soft glass fiber defects. The study of this phenomenon has thus far been restricted to standard silica fibers.
Mario Ferraro   +10 more
doaj   +1 more source

Study of glass preforms for glass fiber optics applications (study of space processing of ceramic materials) [PDF]

open access: yes
The feasibility, and technical and economic desirability was studied of space processing of glass preforms for optical fiber transmission applications. The results indicate that space processing can produce glass preforms of equal quality at lower cost ...
Wang, F. F. Y.
core   +1 more source

High-gain far-detuned nonlinear frequency conversion in a few-mode graded-index optical fiber

open access: yesScientific Reports
We present theoretical and experimental evidence of high-gain far-detuned nonlinear frequency conversion, extending towards both the visible and the mid-infrared, in a few-mode graded-index silica fiber pumped at 1.064  $$\upmu \hbox {m}$$ μ m , and more
Karolina Stefańska   +5 more
doaj   +1 more source

Periodic structure in graded-index multimode fiber [PDF]

open access: yes, 2019
203 p. This thesis studies the periodic structures in graded-index multimode fibers (GRIN MMF), including fiber Bragg grating (FBG), long period grating (LPG), and periodic microbend. Their fabrication processes, mode coupling analyses, and applications are investigated both theoretically and experimentally. DOCTOR OF PHILOSOPHY (EEE)
openaire   +2 more sources

Achieving a 4 kW Raman fiber amplifier with the assistance of four-wave mixing

open access: yesHigh Power Laser Science and Engineering
Raman fiber lasers, known for their capacity to provide both high-power and precise wavelength emissions, are gaining attraction across a spectrum of applications, including fiber optic communications, sensing, spectroscopy and imaging.
Chenchen Fan   +5 more
doaj   +1 more source

A 1.8 kW high power all-fiber Raman oscillator

open access: yesHigh Power Laser Science and Engineering
Fiber Bragg grating-based Raman oscillators are capable of achieving targeted frequency conversion and brightness enhancement through the provision of gain via stimulated Raman scattering across a broad gain spectrum.
Chenchen Fan   +7 more
doaj   +1 more source

Measurements of few-mode fiber photonic lanterns in emulated atmospheric conditions for a low earth orbit space to ground optical communication receiver application [PDF]

open access: yes
Photonic lanterns are being evaluated as a component of a scalable photon counting real-time optical ground receiver for space-to-ground photon-starved communication applications. The function of the lantern as a component of a receiver is to efficiently
Betters, Christopher   +6 more
core   +1 more source

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