Achromatic doublets have been used for decades to minimize the effects of chromatic aberrations inherent to single-glass optical lenses. Here, we propose a fundamentally different solution to correct the chromatic aberrations based on a nanowire metamaterial with low loss anomalous dispersion. We show that by coating a standard glass lens with the metamaterial it may be possible to design a com...

Abstract In the optical communication system, fibers are used to transmit information in a long-haul system at very high speed. However, attenuation causes loss signal transmission. Chromatic dispersion is an ultimate limiting factor for high-speed long-distance communication. The chromatic broadening of incident pulse while traversing along fiber length. This reduces information-carrying capac...

Novel structure of a Photonic Crystal Fiber (PCF) is proposed for flattened dispersion characteristics. As compared with the conventional PCFs, the proposed PCF has no air holes in second ring area. Then the proposed PCF has a concentric missing ring PCF. Here silica glass is used as core material. It has been demonstrated that when we change the layer of PCF, dispersion is also changed. The ch...

Chromatic dispersion measurements require experimental conditions which meet with particular difficulties, that is, a wide spectral coverage and a picosecond time resolution over a kilometer-length fiber. This paper shows what makes of these measurements an experimental challenge and the main solutions found since the tate seventies are reviewed. Pulse propagation, interferometric and phase-shi...

Surface plasmon resonance (SPR) sensor is widely used for its high precision and real-time analysis. Fiber-optic SPR sensor is easy for miniaturization, so it is commonly used in the development of portable detection equipment. It can also be used for remote, real-time, and online detection. In this study, a wavelength modulation fiber-optic SPR sensor is designed, and theoretical analysis of o...

An investigation of the chromatic properties of waveguide lenses is described. In general, the focal length of mode-index and Fresnel zone (diffractive) lenses will be a function of wavelength. As a result, these lenses will have high optical quality over only a relatively small wavelength range. A method is given to correct for this chromatic dispersion by forming a hybrid mode-index/diffracti...

The present paper describes a novel systematic solution to the challenging task of realizing photonic crystal fibers (PCFs) with flat chromatic dispersion, low leakage losses, and large mode area, mainly for applications as information carriers in wide-band high speed optical transmission systems. The proposed design strategy is based on the existence of an artificially-defected air-hole ring i...

Maximum likelihood sequence estimation (MLSE) has been proposed in earlier literature to combat the effects of nonlinear dispersion in intensity modulation/direct detection (IM/DD) optical channels. In this paper, we develop a theory of the bit error rate (BER) of MLSE-based IM/DD receivers operating in the presence of nonlinear dispersion and amplified spontaneous emission (ASE) noise. We focu...