Paper

My Eighth Paper

This work was first authored by Dr Wajahat Ali, and is more work using fluorescent fibres.

Abstract

Fluorophore doped plastic optical fibers can be used to create optical concentrators in receivers for visible light communications, that also act as wide field of view filters. Increasing the length of these fibers allows them to collect more of the signal from the transmitter, however, it can also reduce the bandwidth of the fiber. Results are presented from 3 different lengths of fiber which show that the best length of a fluorescent fiber depends upon the data rate. However, a simple calculation results in a length that is a good choice for a range of OOK data rates.

Key Findings

Fluorophore-doped optical elements can create wide field of view VLC receivers by concentrating transmitted light and filtering out ambient light. The fluorophore’s lifetime and transit time of photons in the concentrator impact the receiver’s bandwidth. Optimal fiber length depends on the required data rate, with a match between transit time and fluorophore lifetime being preferable for higher rates. A 30 cm length of SCSF-81J fluorescent fiber integrates well with systems like laptops and allows multiple fibers to be connected, significantly reducing required light intensities. Further investigation is needed for optimizing fiber length in different scenarios.