An International Research Journal

AJP

SSN : 0971 - 3093

Vol 26, No 3, March, 2017

Accepted Papers


Asian Journal of Physics                                                                                                    Vol. 26 No 3, 2017, 00-00


 Bending effects in large core graded index fibre with multi-channel transmission


Siriaksorn Jakborvornphan, Rupert Young, Phil Birch, and Chris Chatwin

School of Engineering and Designs, University of Sussex, UK

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One of the key challenges in the design of a fibre optics system that degrades the system performance is the presence of bending, which should be carefully considered to ensure a reduction of losses in order to further increase the total carrying capacity. In this work, we present numerical simulations to examine bending loss in a newly designed high-capacity fibre with a large-core diameter of 200 μm and graded index profile (GI200 fibre) supporting a multiplicity of communication channels at a wavelength of 1.55 μm. In addition, we investigate the effect of bending on the periodic reconstruction phenomenon when four input channels are multiplexed into both a single bend and multiple bends of fibre under various bending conditions. © Anita Publications. All rights reserved.

Keywords: Graded refractive-index profile; spatial diversity; bending loss.

Total Refs: 21

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Asian Journal of Physics                                                                                                    Vol. 26 No 3, 2017, 00-00


Time: The Enigma of Space


Francis T S Yu
Emeritus Evan Pugh (University)
Professor of Electrical Engineering, Penn State University, University Park, PA 16802, USA

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In this article we have based on the laws of physics to illustrate the enigma time as creating our physical space (i.e., the universe). We have shown that without time there would be no physical substances, no space and no life. In reference to Einstein’s energy equation, we see that energy and mass can be traded, and every mass can be treated as an Energy Reservoir. We have further shown that physical space cannot be embedded in absolute empty space and cannot have any absolute empty subspace in it. Since all physical substances existed with time, our cosmos is created by time and every substance including our universe is coexisted with time. Although time initiates the creation, it is the physical substances which presented to us the existence of time. We are not alone with almost absolute certainty. Someday we may find a right planet, once upon a time, had harbored a civilization for a short period of light years.  © Anita Publications. All rights reserved.

Keywords: Einstein’s energy equation, Physical space, Universe

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