Results 41 to 50 of about 423,477 (202)

Communication system uses modulated laser beam [PDF]

, 1965
Electro-optical system is placed on a satellite to effect communications between two remote stations.
Minott, P. O.
core   +1 more source

Anisoplanatism in airborne laser communication

Optics Express, 2008
Airborne laser-communication systems require special considerations in size, complexity, power, and weight. We reduce the variability of the received signal by implementing optimized multiple-transmitter systems to average out the deleterious effects of turbulence.
James A, Louthain, Jason D, Schmidt
openaire   +2 more sources

Metamaterial-based Nano-Antenna Design of Enhanced Plasmonic Electromagnetic Properties

Tikrit Journal of Engineering Sciences
This work, presents a design of a nano-antenna based plasmonic materials at the frequency range from 192THz to 195THz for modern applications, including THz communication systems. The proposed antenna is constructed from the 3rd iteration of the Hilbert
Ahmed E. Saleem, Jawad A. Hasan
doaj   +1 more source

2.4-W Narrow-Linewidth Q-Switched $\hbox{Tm}^{3+}$ -Doped Double-Clad Fiber Laser

IEEE Photonics Journal, 2013
A narrow-linewidth 793-nm diode-pumped Tm3+ -doped double-clad silica fiber laser operated at 2 μm and actively Q-switched with an acousto-optic modulator is reported.
Qijie Huang, Ting Yu, Yameng Zheng, Jifeng Zu, Weibiao Chen   +4 more
doaj   +1 more source

Sensitivity Deterioration of Free-Space Optical Coherent/Non-Coherent OOK Modulation Receiver by Ambient Light Noise

Sensors, 2023
In free-space optical (FSO) communication systems, on–off keying (OOK) is a widely used modulation format. Coherent and non-coherent OOK receivers with sensitivities of −54.60 dBm and −51.25 dBm, respectively, were built with a communication rate of 1 ...
Weijie Ren, Jianfeng Sun, Haisheng Cong, Yuxin Jiang   +3 more
doaj   +1 more source

Submarine laser communications

Conference on Lasers and Electro-Optics, 1982
No abstract ...
openaire   +2 more sources

Research on Time-Sensitive Service Transmission Routing and Scheduling Strategies Based on Optical Interconnect Low Earth Orbit Mega-Constellations

Applied Sciences
The development of low-orbit satellite communication networks marks the beginning of a new era in global communication. However, in the context of large-scale LEO satellite communication scenarios, the traditional adjacent connection transmission method ...
Bingyao Cao, Xiwen Fan, Yiming Hong, Qianqian Zhao   +3 more
doaj   +1 more source

Hybrid MPPM-BB84 Quantum Key Distribution Over FSO Channel Considering Atmospheric Turbulence and Pointing Errors

IEEE Photonics Journal, 2021
Nowadays, a high level of security is required for the transmission of critical information. Quantum Key Distribution (QKD) systems are considered the best option to protect such information.
Nancy Alshaer, Mohamed E. Nasr, Tawfik Ismail   +2 more
doaj   +1 more source

Laser communication system is insensitive to atmospherically induced noise [PDF]

, 1967
Angle modulated transmitted reference heterodyne laser communication system is insensitive to atmospherically induced amplitude noise fluctuations and phase ...
Packard, J. N.
core   +1 more source

High-Gain Optical Injection Locking Amplifier in Phase-Coherent Optical Frequency Transmission

IEEE Photonics Journal, 2019
Optical amplification, which is necessary for extending the distance of optical frequency transfer, has a significant impact on the transmission performance.
Zitong Feng, Xi Zhang, Rui Wu, Yanguang Sun, Fang Wei, Fei Yang, Youzhen Gui, Haiwen Cai   +7 more
doaj   +1 more source