Investigations on mode-division multiplexed free-space optical transmission for inter-satellite communication link

Wireless Networks - Inter-satellite data transmission links are very crucial for providing global inter-connectivity. We report designing and investigations on high date rate inter-satellite...     

Design of novel circular lattice photonic crystal fiber suitable for transporting 48 OAM modes

In this paper, we propose and numerically investigate a novel circular lattice photonic crystal fiber (CL-PCF) using controllable GeO2 doped silica, suitable for modes carrying quantized orbital angular momentum (OAM). Large effective index separations between 25 supported vector modes (≥10-4) are confirmed over large bandwidth (C+L bands) leading to 48 OAM modes bearing information. The simulations show that the modes in the proposed CL-PCF have good features including low and flat dispersion (within 51.82 ps/km/nm), low confinement loss (lower than 0.002 dB/m), high effective mode area (88.5 μm2) and low nonlinearity (1.22 W-1.km-1). These promising results show that the proposed CL-PCF could be an arguably candidate in fiber-based OAM multiplexing or other applications using OAM states.     

Analysis of Agricultural Water Allocation and Returns in the Sultanate of Oman

Water is the most important determinant of agricultural production in Oman. Remarkable public and private investments have been drawn into water resources development and into the modernization of the farming techniques in order to strengthen the contribution of agriculture to the national economy. In spite of these technological improvements and significant investments, water allocation remains a major policy issue. This paper discusses current water use and explores alternatives for improved allocation of agricultural water. Available data suggest that physical and economic returns to water are low. Improvement of returns to water resources could come from producing higher quality and higher value crops for domestic and foreign markets using improved irrigation techniques. This trend needs to be enforced by stringent water conservation measures in order to reach a long-term sustainable water use.     

Correction to: Study of Critical Magnetic Behaviour in Nanocrystalline La0.65Ce0.05Sr0.3Mn1−xCuxO3 (x = 0, x = 0.05 and x = 0.15) Prepared by Pechini Method

Journal of Superconductivity and Novel Magnetism -