Full polarization control for fiber optical quantum communication systems using polarization encoding (original) (raw)

Quantum Telery - Polarizer based Synchronous Optical Communication System

Vellore Institute of Technology Thesis, 2021

The optical communication arena has perceived a surge in its usage and promising future recently. In this tempest for excellence, getting a versatile and efficient mode of optical transmission is inevitable. Following this, our idea contributes a vital stride forward by proposing a new modulation technique based on the polarizers' intricate working. Due to their complicated quantum results of the three-polarizer paradox, Polarizers are still unique in their practical usage in different fields. The new scheme uses the source's optical intensity and wavelength as the varying parameter for message data encoding, which can also be termed the merger of the amplitude modulation and the chromatic shifting, accomplished by Polarizer's specific orientation and externally modulating it. The rotation of the Polarizers into known orientation yields an inexorably predicted intensity backed by Physics equations. The output into quantized intensity levels serves our purpose of communication, where we try to translate the binary values into Optical intensity levels essential for communication. The study includes the requirements and performance of different components essential for transmission and reception. Moreover, it is compatible with the conventional optical sources in the visible region, such as LASER or LED. Implementing further advancements in the field of encoding techniques can increase the efficiency of transmission significantly, as well. The Graphical interface backs the modulation scheme for user-friendliness along with the numerous transmission options it provides. We proceed further to detailed applicability of the photoelectric effect and design an Optical Intensity receiver using LDR on the receiver side, enabling proper decoding of the transmitted message.