Classical-quantum signals simultaneous transmission sharing a same fiber based on mode division multiplexing

Information is physical, so its manipulation through devices is subject to its own mechanics: the science and engineering of behavioral description, which is intermingled with classical, quantum and statistical mechanics principles. This chapter is a unification of these principles and physical laws with their implications for nanoscale. Ideas of state machines, Church-Turing thesis and its embodiment in various state machines, probabilities, Bayesian principles and entropy in its various forms (Shannon, Boltzmann, von Neumann, algorithmic) with an eye on the principle of maximum entropy as an information manipulation tool. Notions of conservation and non-conservation are applied to example circuit forms folding in adiabatic, isothermal, reversible and irreversible processes. This brings out implications of fluctuation and transitions, the interplay of errors and stability and the energy cost of determinism. It concludes discussing networks as tools to understand information flow and decision making and with an introduction to entanglement in quantum computing.

Download Full-text

A 2 × 20 Gbps hybrid MDM-OFDM–based high-altitude platform-to-satellite FSO transmission system

Journal of Optical Communications ◽

10.1515/joc-2020-0075 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Vel Murugan Gomathy ◽

T. V. Paramasivam Sundararajan ◽

C. Sengodan Boopathi ◽

Pandiyan Venkatesh Kumar ◽

Krishnamoorthy Vinoth Kumar ◽

...

Keyword(s):

High Altitude ◽

Orthogonal Frequency Division Multiplexing ◽

High Speed ◽

Satellite Communication ◽

Input Power ◽

Transmission System ◽

Communication Link ◽

Space Optics ◽

High Altitude Platform ◽

Mode Division Multiplexing

AbstractIn the present study, the application of free space optics (FSO) transmission system to realize a long-reach high-altitude platform (HAP)-to-satellite communication link has been exploited. High-speed information transmission without interference is accomplished using orthogonal frequency division multiplexing (OFDM). Further, the information capacity of the proposed system is increased by employing mode division multiplexing (MDM). We have investigated the proposed MDM-OFDM-HAP-to-satellite FSO transmission system performance over varying FSO range, diameter of the receiver, pointing errors, and input power. Also, an improved transmission performance of the proposed system using a square root module is reported.

Download Full-text

40 Gb/s High-speed mode-division multiplexing transmission employing NRZ modulation format

Journal of Optical Communications ◽

10.1515/joc-2019-0251 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Rabiu Imam Sabitu ◽

Nafizah Goriman Khan ◽

Amin Malekmohammadi

Keyword(s):

System Performance ◽

High Speed ◽

Direct Detection ◽

Signal To Noise Ratio ◽

Optical Signal ◽

Threshold Power ◽

Modulation Format ◽

Transmission Distance ◽

Mode Division Multiplexing ◽

Speed Mode

AbstractThis report examines the performance of a high-speed MDM transmission system supporting four nondegenerate spatial modes at 10 Gb/s. The analysis adopts the NRZ modulation format to evaluate the system performance in terms of a minimum power required (PN) and the nonlinear threshold power (PTH) at a BER of 10−9. The receiver sensitivity, optical signal-to-noise ratio, and the maximum transmission distance were investigated using the direct detection by employing a multimode erbium-doped amplifier (MM-EDFA). It was found that by properly optimizing the MM-EDFA, the system performance can significantly be improved.

Download Full-text