A Data Transmission Method with Spectral Switches via Electroabsorption

Jyun-Ping Chang,Jun-Hong Weng,Pei-Yuan Lee,Pin Han,Hsun-Ching Hsu

doi:10.3390/app12030979

Abstract

In the past, the waveguide electroabsorption effect has generally been used as an intensity modulator for quasi-monochromatic light, such as lasers. Here, we study how this effect affects polychromatic light spectra. We find that for light with a Gaussian distribution spectrum, the spectral peak shift (red shift or blue shift) can be controlled by the magnitude of the applied voltage, as long as the center wavelength and the spectral band are properly selected. This result can be used as a data transmission scheme at the integrated chip level or in free space. It may offer a good option for some other light sources, such as low-cost LED or ELED (edge emitting LED), with wider spectral bandwidths.

Highlights

There have been many studies on spectrum manipulation since the scaling law proposition (Wolf effect) in the mid-1980s [1,2]
Other properties of light, such as the correlation [12] and polarizations [13] can vary after propagation/or interaction with material through various mechanisms, such as the surface plasmon effect [14]
We found that a spectral switch can be produced and it can be utilized as a digital data transmission scheme

Summary

Introduction

There have been many studies on spectrum manipulation since the scaling law proposition (Wolf effect) in the mid-1980s [1,2]. Many mechanisms leading to spectra changes have been discussed, such as the EO effect [3] photorefractive material interactions [4], spectral correlation [5] and coherence change [6]. Other properties of light, such as the correlation [12] and polarizations [13] can vary after propagation/or interaction with material through various mechanisms, such as the surface plasmon effect [14]. Phase singularity is a phenomenon where light vanishes at points when three or more waves interfere. At these places where the intensity of the wave is zero, the phase is undefined (singular) and generally all 2 phase values occur around the zero point [16]

Methods

Results

Conclusion