نتایج جستجو برای: optical dispersion
تعداد نتایج: 321621 فیلتر نتایج به سال:
Dispersion management (DM), optical phase conjugation (OPC), and the combination of these two are promising techniques to compensate for the signal distortion due to group velocity dispersion and optical Kerr effects of single mode fiber. The goal of this paper is to investigate the system performance depending on the variation degree of the random variable of RDPSs in the optical links for 960...
The ability to control chromatic dispersion is paramount in applications where the optical pulsewidth is critical, such as chirped pulse amplification and fiber optic communications. Typically, devices used to generate large amounts (>100 ps/nm) of chromatic dispersion are based on diffraction gratings, chirped fiber Bragg gratings, or dispersion compensating fiber. Unfortunately, these dispers...
A new spectroscopic technique that is based on molecular dispersion spectroscopy and enables new capabilities in chemical detection as compared to well-established laser absorption spectroscopy will be discussed in this paper. Differential optical dispersion spectroscopy (DODiS) enables simultaneous measurement and comparison of two gas samples. This is performed through simultaneous detection ...
We precisely determine the dispersion of an optical cavity over a large spectral bandwidth using a broadband optical comb generated by a femtosecond laser. This approach permits the effective characterization of the next generation of mirrors that will offer high reflectivity, minimal absorption/scattering loss, and well-defined dispersion characteristics. Such mirrors are essential for constru...
The use in silicon photonics of the new optical materials developed in soft matter science (e.g. polymers, liquids) is delicate because their low refractive index weakens the confinement of light and prevents an efficient control of the dispersion properties through the geometry. We experimentally demonstrate that such materials can be incorporated in 700 μm long slot photonic crystal waveguide...
Dispersion in spectral domain optical coherence tomography (SD OCT) system cause a degradation of point spread function (peak broadening) after FFT of the spectrum with the increase of the optical path distance between an object and reference arm. Different sources of dispersion and methods for the compensation are shown.
In this article, we analytically investigate the spectral broadening by self-phase modulation of strongly chirped optical pulses. The dispersion due to the nonlinear optical process is expressed as functions of a linear and a nonlinear initial chirp. As a result, it is found that the third-order dispersion strongly depends on the initial linear chirp and the nonlinearity for self-phase modulation.
The London dispersion forces, along with the Debye and Keesom forces, constitute the long-range van der Waals forces. London’s and Hamaker’s work on the point-to-point dispersion interaction and Lifshitz’s development of the continuum theory of dispersion are the foundations of our understanding of dispersion forces. Dispersion forces are present for all materials and are intrinsically related ...
This paper presents the application of an L1 adaptive control architecture to the problem of active dispersion management for propagation of Gaussian-shaped solitons along uncertain optical fibers. The derivations in the paper are based on a reduced variational model for optical soliton propagation. Simulation results demonstrate the benefits of the proposed closed-loop adaptive approach over e...
Recent developments in thin-film coatings for optical communication systems are reviewed. Particular emphasis is given to thin-film designs with dispersion related to the photonic crystal superprism effect. A single dispersive coating may be used for multiplexing or demultiplexing several wavelength channels by spatial beam shifting. 2004 Optical Society of America OCIS codes: (310.0310) Thin ...
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