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Negative dispersion in γ-Mo 2 N/Si(100) films
2011 Edition, June 1, 2011 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Molybdenum nitride films γ-Mo 2 N/Si have been fabricated with reactive magnetron sputtering of metal target in (N 2 + Ar) gas mixture. Phase composition of the films has been defined with RHEED. Refractive index and extinction...

Negative dispersion without absorption
1999 Edition, January 1, 1999 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Summary form only given. We study the optical properties of negative dispersive but nevertheless transparent media. Such medium can be generated using atomic phase coherence. Theoretical studies have shown that strongly driven two level systems may exhibit the desired optical properties,...

Realization of negative dispersion without absorption
1998 Edition, January 1, 1998 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Summary form only given. We report on the experimental realization of negative-dispersion in nevertheless nonabsorbing media. Such media are relevant for various reasons. They may be used, for example, inside a cavity to increase its bandwidth without sacrificing its buildup...

Harmonic reduction for broadband helix TWTs with negative dispersion
2012 Edition, April 1, 2012 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

An analysis of harmonic reduction with negative dispersion for broadband helix Traveling-Wave tubes (TWTs) is put forward. The synchronization of the harmonic content is reduced by the decrease of the phase velocity of fundamental wave demonstrated by the field relative phase. A...

Novel large negative dispersion photonic crystal fiber for dispersion compensation
2011 Edition, July 1, 2011 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A novel large negative dispersion photonic crystal Fiber (PCF) with dual-core structure is proposed. A new outer core is formed by replacing or filling the 3rd ring air-holes around the inner core with high refractive index material. The dispersion property is investigated...

Tunable Semiconductor Double-Chirped Mirror With High Negative Dispersion
2014 Edition, Volume 26, January 1, 2014 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

We have developed a tunable semiconductor double-chirped mirror with high negative dispersion grown by molecular beam epitaxy. The simplified numerical plane-wave reflection transfer method was applied to design the dispersive mirror structure. The multilayer stack was grown of...

Hollow-core photonic bandgap fibers with broadband negative dispersion slope
2009 Edition, May 1, 2009 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Hollow-core photonic bandgap fibers exhibiting negative dispersion slope over a wide wavelength range around one micron for the fundamental air-core mode are presented by the introduction of partial reflector layer around the core.

High negative dispersion and low confinement loss photonic crystal fiber
2007 Edition, October 1, 2007 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A novel design of high negative dispersion and low confinement loss photonic crystal fiber (PCF) was proposed. The PCF designed has a high dispersion of -1120 ps/nm/km and a very low confinement loss of 1.01*1 10-6 dB/km at 1.55 mum.

Demonstration of negative dispersion fibers for DWDM metropolitan area networks
2001 Edition, Volume 7, May 1, 2001 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

We present a detailed experimental and theoretical study, showing that a novel nonzero dispersion-shifted fiber with negative dispersion enhances the capabilities of metropolitan area optical systems, while at the same time, reducing the system cost by eliminating the need of...

Wide-band High Negative Dispersion-Flattened Fiber
2002 Edition, Volume 3, January 1, 2002 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

We have proposed high negatve dispersion-flattened fiber at wide wavelength band for the first time. The fabricated fiber has a chromatic dispersion of about -60ps/nm/km at 1.55□ and dispersion slope within ± 0.005 ps/nm2/km much flatter than those of conventional...

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