Flexible Optical Amplifier for Visible-Light Communications Based on Organic-Inorganic Hybrids
authors Bastos, A; McKenna, B; Lima, M; Andre, PS; Carlos, LD; Evans, RC; Ferreira, RAS
nationality International
journal ACS OMEGA
keywords WHITE-LIGHT; ORGANIC/INORGANIC HYBRIDS; COLOR-CONVERTER; WAVE-GUIDES; EMISSION; PHOTOLUMINESCENCE; LASER; GAIN; ARCHITECTURES; AMPLIFICATION
abstract Visible-light communications (VLCs) based on white light-emitting diodes (LEDs) are emerging as a low-cost and energy-efficient alternative solution to wireless communications. As white emitting LEDs use a combination of a long-lived yellow emission combined with the faster response of a blue emitting LED (similar to 460 nm), VLC technology requires amplification of the blue component to improve the signal-to-noise ratio. We report the fabrication and characterization of planar and channel waveguides based on a blue-emitting polyfluorene conjugated polyelectrolyte, namely, poly[9,9-bis(4-sulfonylbutoxyphenyl)fluorene-2,7-diyl-alt-1,4-phenylene] (PBS-PFP) incorporated into diureasil organic-inorganic hybrids for optical amplification in VLC. Taking advantage of the diureasil host as a UV self-patternable material, direct UV laser writing was used to pattern channel waveguides with a larger refractive index (Delta n=0.09) compared to the nonexposed region, enabling confinement and guidance of the PBS-PFP emission with a maximum optical gain efficiency value of 1.62 +/- 0.02 cm mu J-(1). This value is among the best figures of merit known for polymeric materials with additional advantages added by the diureasil hybrid host, namely, mechanical flexibility, thermal stability, and low insertion losses due to the nearly null refractive index contrast between the optical fiber and the amplification device, establishing the proposed approach as a promising cost-effective solution for optical amplification in VLCs.
publisher AMER CHEMICAL SOC
issn 2470-1343
year published 2018
volume 3
issue 10
beginning page 13772
ending page 13781
digital object identifier (doi) 10.1021/acsomega.8b01726
web of science category Chemistry, Multidisciplinary
subject category Chemistry
unique article identifier WOS:000449026500156
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journal analysis (jcr 2019):
journal impact factor 2.87
5 year journal impact factor 2.905
category normalized journal impact factor percentile 54.52
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