Red-shift effect in multi-color LEDs based visible light communication

Tugcu, Emin; Yazgan, Ayhan; Albayrak, Cenk

doi:10.1016/j.optcom.2020.125451

Cited by 10 publications

(4 citation statements)

References 15 publications

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“…This is due to the shortage of available RF spectra and limited bandwidth . Optical wireless communications (OWCs), on the other hand, offer unlicensed and secure full spectral bandwidths ranging from ultraviolet (UV) to infrared, providing a new pathway for achieving uninhibited growth in high-speed and low-latency data transmission. − However, conventional color-converting phosphors used in high-speed OWCs are based solely on ceramic or perovskite materials, which are composed of environmentally unfriendly elements, and require harsh synthesis conditions with a high fabrication cost, significantly limiting their commercialization potential. ,,− …”

Section: Introductionmentioning

confidence: 99%

Engineering Metal–Organic Frameworks with Tunable Colors for High-Performance Wireless Communication

Wang

Almalki

et al. 2023

J. Am. Chem. Soc.

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Metal–organic frameworks (MOFs) have emerged as excellent platforms possessing tunable and controllable optical behaviors that are essential in high-speed and multichannel data transmission in optical wireless communications (OWCs). Here, we demonstrate a novel approach to achieving a tunable wide modulation bandwidth and high net data rate by engineering a combination of organic linkers and metal clusters in MOFs. More specifically, two organic linkers of different emission colors, but equal molecular length and connectivity, are successfully coordinated by zirconium and hafnium oxy-hydroxy clusters to form the desired MOF structures. The precise change in the interactions between these different organic linkers and metal clusters enables control over fluorescence efficiency and excited state lifetime, leading to a tunable modulation bandwidth from 62.1 to 150.0 MHz and a net data rate from 303 to 363 Mb/s. The fabricated color converter MOFs display outstanding performance that competes, and in some instances surpasses, those of conventional materials commonly used in light converter devices. Moreover, these MOFs show high practicality in color-pure wavelength-division multiplexing (WDM), which significantly improved the data transmission link capacity and security by the contemporary combining of two different data signals in the same path. This work highlights the potential of engineered MOFs as a game-changer in OWCs, with significant implications for future high-speed and secure data transmission.

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Section: Introductionmentioning

confidence: 99%

Engineering Metal–Organic Frameworks with Tunable Colors for High-Performance Wireless Communication

Wang

Almalki

et al. 2023

J. Am. Chem. Soc.

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“…With the rapid rise in data traffic over wireless infrastructures, the conventional radio frequency (RF) wireless technology struggles to meet the increasing demand due to the shortage of available RF spectra and limited bandwidth . In the meantime, optical wireless communication (OWC) offers an unlicensed and secure bandwidth spanning the ultraviolet (UV) to infrared wavelengths, providing a new pathway for uninhibited growth in higher-speed and low-latency data transmission contributing to the Internet of things (IoT), Internet of underwater things (IoUT), and light-fidelity (Li-Fi). − Color-converting phosphors play an essential role in the OWC system. They allow the transmitter (i.e., laser diode (LD) or light-emitting diode (LED)) to function in white-light illumination with a high color rendering index (CRI) or improve the responsivity of the silicon-based photoreceiver for solar-blind UV communication. , However, conventional materials used in visible-light communication (VLC) are centered mainly on ceramic, perovskite, and organic emitters ,,− that require complex synthesis processes, high cost of fabrication, toxicity, and poor tunability, which hinder their continuous development and commercialization. , Therefore, the field of architectural design and fabrication of low-cost, high-modulation bandwidth, and reliable light communication materials is becoming one of the most attractive research avenues for materials scientists, physicists, and engineers.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Frameworks in Mixed-Matrix Membranes for High-Speed Visible-Light Communication

Wang

Nadinov

et al. 2022

J. Am. Chem. Soc.

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Mixed-matrix membranes (MMMs) based on luminescent metal−organic frameworks (MOFs) and emissive polymers with the combination of their unique advantages have great potential in separation science, sensing, and light-harvesting applications. Here, we demonstrate MMMs for the field of highspeed visible-light communication (VLC) using a very efficient energy transfer strategy at the interface between a MOF and an emissive polymer. Our steady-state and ultrafast time-resolved experiments, supported by high-level density functional theory calculations, revealed that efficient and ultrafast energy transfer from the luminescent MOF to the luminescent polymer can be achieved. The resultant MMMs exhibited an excellent modulation bandwidth of around 80 MHz, which is higher than those of most wellestablished color-converting phosphors commonly used for optical wireless communication. Interestingly, we found that the efficient energy transfer further improved the light communication data rate from 132 Mb/s of the pure polymer to 215 Mb/s of MMMs. This finding not only showcases the promise of the MMMs for high-speed VLC but also highlights the importance of an efficient and ultrafast energy transfer strategy for the advancement of data rates of optical wireless communication.

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“…Alternatively, the behaviour of LEDs as optical data transmitters has also been analysed. In particular, temperature-related changes in the LED spectral properties are widely recognized to have a negative impact on communication performance if they are not taken into consideration during the data reception [8,9]. This paper presents a communication scheme using LEDs as transmitters and a multispectral (MS) camera as a RX.…”

mentioning

confidence: 99%

Multispectral Optical camera communication links based on spectral signature multiplexing

Moreno

Guerra²,

Rufo

et al. 2023

IET Optoelectronics

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Optical camera communication is foreseen to have an essential role in future systems requiring wireless communication capability. In this regard, high‐spectral‐resolution cameras, such as multispectral (MS) cameras, present specific characteristics that can be exploited to provide new features to optical camera communication links. Using the MS cameras' features to take advantage of the light‐emitting diode (LED) behaviour in a novel communication scheme is focussed. Notably, LED spectral response curves are different when their temperature changes. Therefore, these differences can be detected based on the MS cameras' spectral resolution. Thus, more than one communication channel can be attained using the same LED device since the camera can distinguish the different LED spectral signatures. This new approach is analysed in this work, including some equalisation techniques applied to the channel matrix in the receiver to improve the extraction of the transmitted signal reducing the inter‐channel interference. For the specific MS camera employed in the experiments, up to two distinct channels could be obtained with the same transmitter at different temperatures, getting a bit error rate below the forward error correction limit. However, obtaining satisfactory results is highly dependent on the variation that temperature causes in the spectral signatures of the LEDs, so further experiments are recommended in future work with different devices.

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Red-shift effect in multi-color LEDs based visible light communication

Cited by 10 publications

References 15 publications

Engineering Metal–Organic Frameworks with Tunable Colors for High-Performance Wireless Communication

Engineering Metal–Organic Frameworks with Tunable Colors for High-Performance Wireless Communication

Metal–Organic Frameworks in Mixed-Matrix Membranes for High-Speed Visible-Light Communication

Multispectral Optical camera communication links based on spectral signature multiplexing

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