Energy losses and fluorescent efficiency of RhB-doped polymer microfibers via optical waveguiding excitation

Area of Science:

• Materials Science
• Optoelectronics
• Photonics

Background:

• Dye-doped microfibers are promising for optical applications.
• Understanding energy loss and fluorescence is crucial for device design.

Purpose of the Study:

• To investigate the impact of Rhodamine B doping concentration on energy losses and fluorescent efficiencies in polymer microfibers (PMFs).
• To identify optimal doping levels for enhanced optical waveguiding and fluorescence propagation.

Main Methods:

• Fabrication of Rhodamine B-doped polymer microfibers (PMFs) with varying doping concentrations (2.0, 2.4, 2.8, and 3.2 mg/g).
• Optical waveguiding excitation to measure energy loss rates for excitation light and fluorescence.
• Analysis of fluorescence ratio at the coupling point and fluorescent emitting efficiency at the output end.

Main Results:

• The 2.4 mg/g concentration exhibited the highest energy loss rates for both excitation light and fluorescence.
• Fluorescent emitting efficiency decays exponentially with propagation distance.
• An optimal fluorescent propagation effect was achieved at a doping concentration of 2.8 mg/g.

Conclusions:

• Doping concentration significantly influences energy losses and fluorescent efficiencies in Rhodamine B-doped PMFs.
• The study provides critical insights for optimizing dye-doped microfibers for waveguiding circuits and active devices.