High sensitivity tapered fiber refractive index biosensor using hollow gold nanoparticles by Parisa Borjikhani, Nosrat Granpayeh, Mohammad Ismail Zibaii

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Progress in active devices for optical fiber communication by Qiming WANG, Lingjuan ZHAO, Hongliang ZHU, Qin HAN, Buwen CHENG

“…The rapid progress of optical fiber communication makes it become the key technology for the information society.The active and passive optoelectronic devices are the foundation of the optical communication.The progress and development trend of the key active optoelectronic devices were reviewed,including DFB laser,photonic integrated circuit,980 nm high power laser for EDFA pumping,compound semiconductor photodetector and Si-based long wavelength photodetector.…”
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Analysis on the progress of all-optical network standardization and technology development by Rui TANG, Geng ZHANG, Bingbing WU, Wenyu ZHAO, Haiyi ZHANG

“…All-optical network has been considered as the ultimate goal of the optical communication network.With the development of liquid crystal and MEMS technologies and the maturity of configurable optical devices such as WSS,all-optical network has once again become the focus of research and application.Based on the technical status and system architecture of the all-optical network,the technical problems to be solved in the all-optical network were discussed,the latest developments in standardization research were sorted out,the typical problems existing in the all-optical network standardization were further analyzed,and its future developments were finally forecasted.…”
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Research and experiment of open quantum cryptography communication system architecture and co-fiber transmission technology by Jianjun TANG, Junjie LI, Chengliang ZHANG, Yuhua CONG, Haomin GONG

“…Based on the study of the mechanism of quantum encryption system,the system architecture of open quantum cryptographic communication was proposed.In order to better integrate with the existing communication system,a quantum key distribution (QKD) system and a large capacity optical communication co-fiber transmission scheme were proposed,and the QKD system and 80×100 Gbit/s DWDM were verified through experiments.The feasibility of the system common fiber transmission was realized under the condition of ultra 100 km common fiber transmission,the QKD bit rate ＆gt;1.0 kbit/s and 8 Tbit/s DWDM system without error bit and the practical threshold of the commercial encryption device key rate＆gt;1.0 kbit/s was achieved.…”
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Analysis and status of the scattering channel model for ultraviolet communications by Renzhi YUAN, Zhifeng WANG, Mugen PENG

“…Due to its unique features such as high local security, low background noise, and non-light-of-sight communication, the ultraviolet communication, which uses the light wave of “solar blind” wavelength (200～280 nm) as the information carrier, becomes a promising optical communication technique for applications in both secure communications and internet of vehicles and so on.The scattering channel models were classified into analytical channel models and stochastic channel models according to their different computational efficiencies.The research of the first three scattering orders in analytical channel models and the Monte-Carlo simulation model and Monte-Carlo integration model in stochastic channel models were mainly focused on.Some future research directions for the scattering channel model of ultraviolet communications were also provided.…”
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Modulation Transfer Function of a Gaussian Beam Based on the Generalized Modified Atmospheric Spectrum by Chao Gao, Xiaofeng Li

“…The numerical results indicate that the atmospheric turbulence would produce less negative effects on the wireless optical communication system with an increase in the inner scale of turbulence. …”
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Theory and system research of communication with tracking and pointing function for hunter robot by YU Yang1, MIN Fu-hong2, NI Xiao-wu1, ZHANG Hong-chao1

“…Eye-hole wave communication frame was proposed first time.Tracking and pointing model of communication was put forward.New era of short distance optical communication was pioneered.Acguisition method of beaconing light was researched and acquisition time was computed.Two dimension pointing error normal distribution and rayleigh dis-tribution were simulated.Dithering Rician distribution of target pointing was simulated.Attenuation losing formula of receiving len’ diaphragm detection was calculated and simulated.Three dimension pointing error normal distribution and rayleigh distribution were proposed.Three dimension rayleigh fold dithering distribution was proposed.Simulation re-sults are computed and the results is shown.The concept of eye-hole wave communication is proposed first time.The two dimension and three dimension theory model of tracking/pointing dithering problem of robot are put forward and attenua-tion model is presented also.…”
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Effect of Environmental Parameters on the Performance of Optical Wireless Communications by Hosam Abd Elrazek Mohamed Ali, El-Sayed Soliman A. Said, Mohamed Ebrahim Yousef

“…Free space optical communication systems are the future of the communication systems which can meet the needs of the end users who are demanding high bandwidths to support high-speed communication. …”
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Pulse state-interval modulation and experiment in the hostile environments by Yi-ning MU, He WANG, Ping LI, Hui-lin JIANG

“…Based on the Shannon classical communication theory,the atmospheric modulation model of wireless laser communication was investigated for enhancing wireless laser communication adaptability of the atmospheric channel.Firstly,the conversion relations of SER and BER was discussed,from error theory perspectives analysis atmospheric optical wireless communications.Afterwards,by analyzing Shannon limit communication rate of wireless laser communication in atmospheric channel,the importance of atmospheric channel bandwidth gradually came out.On the basis of this,an efficiency pulse state-interval coded modulation was present and its characteristics were estimated.Finally,the feasibility of the PSIM and the importance of atmospheric channel bandwidth to wireless laser communication were proved by wireless laser communication experiment in the hostile environments,At the end,a prospect was pointed out that atmospheric channel properties feedback technique in real time might be a key and precondition in all-weather wireless optical communication.…”
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Analysis and suggestions on inter-satellite laser communication of satellite Internet by Shanzhi CHEN, Zhiwen FAN, Jiade JIN, Yun CAO

“…Satellite communication and terrestrial mobile communication have strong complemented co-benefits.Satellite Internet is the hot spot supporting current industrial development and an important part of the future 6G network.Global coverage requires interstellar networking, but inter-satellite communication bandwidth requirements and the instability brought by the free space channel pose new challenges to the space bearer network.Inter-satellite communication technologies and link interface technologies were compared and analyzed.An optical transport network (OTN) carrier network solution based on inter-satellite laser was proposed, which could fully leverage the advantages of the maturities and the economies of the scaled ground optical communication.It constructs a satellite-terrestrial integrated network with strong cost-efectivity, compatibility, and scalability.Finally, the technological directions and evolutions of the inter-satellite laser communication were discussed, and suggestions for industrial development in China were proposed.…”
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Nonlinear Pulse Shaping in Fibres for Pulse Generation and Optical Processing by Sonia Boscolo, Christophe Finot

“…The signal processing applications will span optical regeneration, linear distortion compensation, optical decision at the receiver in optical communication systems, spectral and temporal signal doubling, and frequency conversion.…”
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Experimental Research on Automatic Alignment and Control Algorithm of Spatial Light-Fiber Coupling by Xizheng Ke, Benkang Yin

“…This study aims to solve the difficulties in the coupling between space light and single-mode fiber (SMF) in free-space optical communication. A fiber coupler based on two-dimensional (2D) piezoelectric ceramics was developed, which uses the stochastic parallel gradient descent (SPGD) algorithm to realize the automatic coupling of space light-SMF. …”
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Propagation Properties of Airy Beam through Periodic Slab System with Negative Index Materials by Long Jin, Xingqiang Zhang

“…It is expected that the proposed manner of beam transmission and corresponding conclusions can be useful for extension applications of optical control, especially for optical communication and optical encryption technique.…”
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Trajectory planning of UUV-assisted UWOC systems based on DQN by Jiawei HU, Xiaoqian LIU, Xinke TANG, Yuhan DONG

“…As a key submarine-based communication platform, unmanned underwater vehicle (UUV) can facilitate underwater wireless optical communication (UWOC).However, fluctuating characteristics of water body, different water qualities, multi-user access present challenges to UUV-assisted UWOC systems, which could be alleviated by an appropriate path planning to maximize the system and each user performance.Deep reinforcement learning (DRL) technology was applied in the path planning of autonomous vehicles, a trajectory planning scheme for UUV-assisted UWOC systems was proposed.The UUV automatically decides the navigation direction through deep Q-network (DQN) method, thereby improving the communication capacity of the system and each user.The impact of distinct water qualities on the capacity enhancement was also investigated.Simulation results suggest that the outputted strategy of DQN can improve the link capacity of the system and each user.This capacity improvement in clear seawater is better than that in pure seawater but lower than that in coastal water.…”
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Performance analysis of dual-hop PLC-FSO communication system by Shenghai CHEN, Xiaoqin YAN, Sai LI, Liang YANG

“…A dual-hop power line communication and free-space optical communication (PLC-FSO) system was proposed, where an amplify-and-forward (AF) relay was applied to help the signal transmission between the PLC link and the FSO link.More specifically, it was assumed that the PLC link was affected by both additive background noise and impulsive noise, and the channel fading followed log-normal distribution, while the fading induced by the atmospheric turbulence in the FSO link followed a Gamma-Gamma distribution, and the effect of pointing errors was also considered.Based on this model, closed-form expressions for the outage probability, bit error rate, and the channel capacity were derived.In addition, asymptotic analysis for the outage probability and BER, and upper bound expression for the channel capacity were presented.Finally, the accuracy of the analytical results was justified through Monte-Carlo simulations.The results show that the system outage probability decreases as the pointing error parameter increases and the smaller the PLC link impulse noise, the lower the bit error rate.The system capacity increases as the turbulence intensity decreases.…”
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Design of a Four-Branch Optical Power Splitter Based on Gallium-Nitride Using Rectangular Waveguide Coupling for Telecommunication Links by Retno W. Purnamaningsih, Nji R. Poespawati, Elhadj Dogheche

“…The optimisation was conducted using the 3D FD-BPM method for long wavelength optical communication. The result shows that, at propagation length of 925 μm, the optical power input was successfully split into four uniform output beams, each with 24% of total input power. …”
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Design considerations for wavefront sensing with self-referencing interferometers in adaptive optics systems by MacGillivray Alexander C., Hristovski Ilija R., Jenne Matthias F., Reeves Andrew P., Mata Calvo Ramon, Holzman Jonathan F.

“…The SRI is developed to aid adaptive optics (AO) control, via deformable mirrors, in correcting wavefront error from atmospheric turbulence in (laser-based) free-space optical communication links. The SRI is used here given its potential to outperform more common wavefront sensors in functioning over weak through strong turbulence conditions. …”
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Capacity analysis for MISO-UWOC systems over GGD weak turbulence with zero boresight pointing error by Yueheng LI, Yining XU, Meiyan JU, Ping HUANG

“…Generalized Gamma distribution (GGD) was chosen to describe the weak oceanic turbulence, and a new hybrid fading channel model that integrated the GGD weak turbulence, the zero boresight pointing error, and the implicit path loss plus multipath propagation characterized by the fading free impulse response (FFIR) was proposed.Subsequently, mathematical expressions for the ergodic capacity and outage capacity of the multiple-input single-output underwater wireless optical communication (MISO-UWOC) systems were derived through the Meijer-G function under a selective transmission (ST) diversity scheme especially while inter-symbol interference (ISI) effects were considered or not.Finally, the correctness of the theoretical formulas derived above was verified by some numerical results.The simulation results show that with the introduction of the ST diversity, the ergodic capacity of the MISO-UWOC systems, taking the transmission ports N=2 as an example, is at least 1.3 times better than that of the conventional point-to-point (P2P) transmission under the same channel condition and system parameters, while the maximum outage capacity decreases is also more than 60% compared with the conventional P2P one.However, the introduction of the ISI will severely reduce this performance improvement.…”
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Optimization and Modeling of Optical Emission Spatial Coverage from Underwater Multi-Faceted Optical Base Stations by Junjie Shi, Chunbo Ma, Xu Tian, Hanjun Guo, Jun Ao

“…Compared with point-to-point wireless optical communication systems, multi-faceted Optical Base Stations (OBSs) offer the advantages of supporting multi-user access and achieving omnidirectional dynamic communication. …”
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Origins and conservation of topological polarization defects in resonant photonic-crystal diffraction by Yin Xuefan, Inoue Takuya, Peng Chao, Noda Susumu

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