scholarly journals A Self-Powered Transparent Photodetector Based on Detached Vertical (In,Ga)N Nanowires with 360° Omnidirectional Detection for Underwater Wireless Optical Communication

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2959
Author(s):  
Jianya Zhang ◽  
Min Jiang ◽  
Lifeng Bian ◽  
Dongmin Wu ◽  
Hua Qin ◽  
...  
Keyword(s):  
Communication Technology ◽  
Optical Communication ◽  
Indium Tin Oxide ◽  
Underwater Communication ◽  
Wireless Optical Communication ◽  
Underwater Environment ◽  
Ito Glass ◽  
Ascii Code ◽  
Self Powered ◽  
Lift Off

Underwater wireless optical communication (UWOC) is a wireless communication technology using visible light to transmit data in an underwater environment, which has wide applications. Based on lift-off (In,Ga)N nanowires, this work has proposed and successfully demonstrated a self-powered photoelectrochemical (PEC) photodetector (PD) with excellent transmissivity. The transparent functionality of the PD is critical for 360° omnidirectional underwater detection, which was realized by detaching the (In,Ga)N nanowires from the opaque epitaxial substrates to the indium tin oxide (ITO)/glass. It was also found that the insulating SiO2 layer can enhance the photocurrent by about 12 times. The core–shell structure of the nanowires is beneficial for generating carriers and contributing to the photocurrent. Furthermore, a communication system with ASCII code is set to demonstrate the PD detection in underwater communication. This work paves an effective way to develop 360° omnidirectional PDs for the wide applications in UWOC system and underwater photodetection.

Performance of LED for line-of-sight (LoS) underwater wireless optical communication system

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Alaa G. Nasser ◽  
Mazin Ali A. Ali
Keyword(s):  
Optical Communication ◽  
Link Quality ◽  
Line Of Sight ◽  
Modulation Scheme ◽  
Underwater Communication ◽  
Optical Communication System ◽  
High Data ◽  
Wireless Optical Communication ◽  
Noise Rate ◽  
Wireless Optical Communications

AbstractUnderwater wireless optical communications (UWOC) recently emerge as a solution to the problem of underwater communication for link with a high data rate, low delay, safety, and high immunity. In this study, the line of sight (LoS) method based on LED used for UWOC with different modulation schemes. The bit error rate (BER), signal-to-noise rate, and quality factor are used for assessing system performance and link quality. Besides the effect of transmitting angle, distance link (d), and transmitting power (PT) are analysed. Results show that 8-pulse position modulation (PPM) is the best modulation scheme for achieving a good link in the LoS method.

Analysis of the Wireless Optical Communication Technology and its Application

2014 ◽  
Vol 687-691 ◽  
pp. 3579-3582
Author(s):  
Fang Jian Li
Keyword(s):  
Optical Fiber ◽  
Communication Technology ◽  
Optical Communication ◽  
Technology Development ◽  
Optical Fiber Communication ◽  
Fiber Communication ◽  
Access Technology ◽  
Wireless Optical Communication ◽  
3G Network ◽  
Problems And Solutions

The wireless optical communication is a kind of broadband access technology, it can be said that it properly combined with the optical fiber and wireless communication technology. More to say, it is a powerful supplement of modern optical fiber communication. In this paper, based on the advantages of wireless optical communication technology, this paper introduces the wireless optical communication technology in the application of 2G network, 3G network and extends the application in backbone network, and analyzes the common problems and solutions in the wireless optical communication. With the advance of technology, the wireless optical communications technology development prospects will be more and more broad, is worthy of popularization and application.

scholarly journals Design of Low Power Hybrid Communication Model

2021 ◽  
Author(s):  
Menaka D ◽  
Sabitha Gauni ◽  
Manimegalai C.T ◽  
Kalimuthu K
Keyword(s):  
Optical Communication ◽  
Data Transmission ◽  
Weather Conditions ◽  
Communication Model ◽  
Underwater Communication ◽  
Long Distance ◽  
Weather Forecasts ◽  
High Data ◽  
Military Equipment ◽  
Wireless Optical Communication

Abstract Communication in underwater is a growing research topic that plays a big role in forecasting accurate weather conditions. In which Acoustic communication is the upcoming technology well qualified for its long-distance underwater communication with certain restrictions like low data rate and high latency. To overcome this constrain wireless optical communication are preferred for high data transmission and less delay. The attempts are made to analyze the performance of the turbid and coastal water conditions.To improve the underwater communication model,a hybrid model is proposed for the applications like weather forecasts, military equipment, and missing debris.

scholarly journals Interference Cancellation for Underwater Environment

2019 ◽  
Vol 8 (2S4) ◽  
pp. 174-176
Keyword(s):  
Optical Communication ◽  
Interference Cancellation ◽  
Spatial Diversity ◽  
Ofdm Systems ◽  
Ofdm System ◽  
Wireless Optical Communication ◽  
Underwater Environment ◽  
Mimo Ofdm ◽  
Environment Regulation ◽  
Ber Performance

In this paper, Performance of MIMO-OFDM systems in underwater wireless optical communication are studied. The execution of MIMO underwater environment regulation is examined. To alleviate turbulence induced fading, spatial diversity over underwater environment link is used. Furthermore, scattering and absorption are considered in the analysis. Analytical BER computations are fundamentally the same as simulated results. Interference cancellation inclusion in OFDM system has better BER performance than conventional method. So, by IC can accomplish high BER productivity than conventional system. Moreover, simulated results demonstrate that OFDM using IC plot has better BER execution for underwater environment.

Efficient Adaptive Equalization for Wireless Optical Communication Systems

2019 ◽  
Vol 28 (1) ◽  
pp. 224-231
Author(s):  
Randa S. Hammad ◽  
El_Sayed M. El_Rabaie ◽  
Fathi. E. Abd-El-Samie ◽  
Ibrahim M. El-Dokany
Keyword(s):  
Optical Communication ◽  
Communication Systems ◽  
Adaptive Equalization ◽  
Wireless Optical Communication ◽  
Optical Communication Systems

scholarly journals Editorial on Special Issue “Modern Applications in Optics and Photonics: From Sensing and Analytics to Communication”

2021 ◽  
Vol 11 (4) ◽  
pp. 1589
Author(s):  
Lourdes S. M. Alwis ◽  
Kort Bremer ◽  
Bernhard Roth
Keyword(s):  
Communication Technology ◽  
21St Century ◽  
Optical Communication ◽  
Biomedical Imaging ◽  
Special Issue ◽  
Key Technologies ◽  
Novel Applications

Optics and photonics are among the key technologies of the 21st century and offer the potential for novel applications in areas as diverse as sensing and spectroscopy, analytics, monitoring, biomedical imaging and diagnostics, as well as optical communication technology, among others [...]

scholarly journals Black Phosphorus-Molybdenum Disulfide Hetero-Junctions Formed with Ink-Jet Printing for Potential Solar Cell Applications with Indium-Tin-Oxide

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 560
Author(s):  
Ravindra Ketan Mehta ◽  
Anupama Bhat Kaul
Keyword(s):  
Electrical Properties ◽  
Molybdenum Disulfide ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Cost Effective ◽  
Contact Materials ◽  
Ito Glass ◽  
The Future ◽  
Potential Applications ◽  
Jet Printing

In this work, we implemented liquid exfoliation to inkjet-print two-dimensional (2D) black phosphorous (BP) and molybdenum disulfide (MoS2) p–n heterojunctions on a standard indium tin oxide (ITO) glass substrate in a vertical architecture. We also compared the optical and electrical properties of the inkjet-printed BP layer with that of the MoS2 and the electrical properties of the mechanically exfoliated MoS2 with that of the inkjet-printed MoS2. We found significant differences in the optical characteristics of the inkjet-printed BP and MoS2 layers attributed to the differences in their underlying crystal structure. The newly demonstrated liquid exfoliated and inkjet-printed BP–MoS2 2D p–n junction was also compared with previous reports where mechanically exfoliated BP–MoS2 2D p–n junction were used. The electronic transport properties of mechanically exfoliated MoS2 membranes are typically better compared to inkjet-printed structures but inkjet printing offers a cost-effective and quicker way to fabricate heterostructures easily. In the future, the performance of inkjet-printed structures can be further improved by employing suitable contact materials, amongst other factors such as modifying the solvent chemistries. The architecture reported in this work has potential applications towards building solar cells with solution processed 2D materials in the future.

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