Optical signal transmission characteristics in slant path of blue-green laser communication links

2013 ◽  
Author(s):  
Yuan-ming Ding ◽  
Lin Song ◽  
Qing-li Liu ◽  
Cheng-sheng Pan
Keyword(s):  
Signal Transmission ◽  
Optical Signal ◽  
Green Laser ◽  
Laser Communication ◽  
Transmission Characteristics ◽  
Communication Links ◽  
Slant Path

The analysis of optical signal transmission characteristics in laser diodes

2006 ◽  
Author(s):  
Do-Gyun Kim ◽  
Young-Seol Yoon ◽  
Kyung-Min Kim ◽  
Joon-Jae Lee ◽  
Young-Wan Choi
Keyword(s):  
Signal Transmission ◽  
Laser Diodes ◽  
Optical Signal ◽  
Transmission Characteristics

scholarly journals New modeling approach of laser communication in constellation and through atmospheric disturbances

2021 ◽  
Vol 10 (4) ◽  
pp. 2088-2099
Author(s):  
Hachemi Chenina ◽  
Djamel Benatia ◽  
M’ Hamed Boulakroune
Keyword(s):  
Laser Beam ◽  
Signal Transmission ◽  
Signal Amplitude ◽  
Optical Signal ◽  
Laser Communication ◽  
External Effects ◽  
Ground Station ◽  
Signal Light ◽  
Atmospheric Disturbances ◽  
Principal Advantage

Laser communication between satellites in the constellation and from the satellites to ground stations offers a gigantic data rate for the users. This principal advantage drives telecom companies to develop this technology to use it like a carrier signal, the most disadvantage of this technology is the need to very complicated pointing systems between the transmitter and the receiver due to a very small beam divergence, continually moving of satellites in orbits and the distance between the satellites (tens of thousands of kilometers). The laser beam suffers continuously from several factors like atmospheric turbulences, internal and external vibrations. All these factors lead to an increase in the bit errors rate and cause degradation in the communication quality. This paper deals with a new method of modelisation of external effects in transmission of signal light from a ground station to the satellite through atmospheric disturbances. Indeed, an in-depth investigation, of the influences of satellite vibrationsinlaser signal transmission between satellites constellation, has been conducted by studying the effect of the intensity of vibrations on the optical signal amplitude. Some solutions are proposed to improve the efficiency of optical satellites communications. 

Comparative analysis of SISO and wavelength diversity-based FSO systems at different transmitter power levels

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Varun Srivastava ◽  
Abhilash Mandloi ◽  
Dhiraj Kumar Patel
Keyword(s):  
Optical Signal ◽  
Free Space Optical ◽  
Optical Source ◽  
Transmit Power ◽  
Single Input Single Output ◽  
Transmitter Power ◽  
Single Output ◽  
Communication Links ◽  
Single Input ◽  
Matching Performance

AbstractFree space optical (FSO) communication refers to a line of sight technology, which comprises optical source and detector to create a link without the use of physical connections. Similar to other wireless communication links, these are severely affected by losses that emerged due to atmospheric turbulence and lead to deteriorated intensity of the optical signal at the receiver. This impairment can be compensated easily by enhancing the transmitter power. However, increasing the transmitter power has some limitations as per radiation regulations. The requirement of high transmit power can be reduced by employing diversity methods. This paper presents, a wavelength-based diversity method with equal gain combining receiver, an effective technique to provide matching performance to single input single output at a comparatively low transmit power.

Impact of atmospheric anisoplanaticity on earth-to-satellite time transfer over laser communication links

2017 ◽  
Author(s):  
Aniceto Belmonte ◽  
Michael T. Taylor ◽  
Leo Hollberg ◽  
Joseph M. Kahn
Keyword(s):  
Laser Communication ◽  
Time Transfer ◽  
Communication Links

scholarly journals In-Band OSNR Measurement Method for All-Optical Regenerators in Optical Domain

2019 ◽  
Vol 9 (24) ◽  
pp. 5438
Author(s):  
Feng Wan ◽  
Baojian Wu ◽  
Feng Wen ◽  
Kun Qiu
Keyword(s):  
Measurement Method ◽  
Signal To Noise Ratio ◽  
Optical Signal ◽  
Error Vector Magnitude ◽  
Regeneration System ◽  
Data Rates ◽  
All Optical ◽  
Communication Links ◽  
Shift Keying ◽  
Nonlinear Devices

We propose an in-band measurement method of optical signal-to-noise ratio (OSNR) output from an all-optical regeneration system with a nonlinear power transfer function (PTF) according to the fact that there are different average gains of signal and noise. For the all-optical quadrature phase-shift keying (QPSK) regenerator as an example, the output OSNR is derived from the input OSNR and the total gain of the degraded QPSK signal. Our simulation shows that the OSNR results obtained by this method are in agreement with those calculated from the error vector magnitude (EVM) formula. The method presented here has good applicability for different data rates but is also useful for analyzing the OSNR degradation of other nonlinear devices in optical communication links.

scholarly journals Designing Plasmonic Eigenstates for Optical Signal Transmission in Planar Channel Devices

ACS Photonics ◽  
2018 ◽  
Vol 5 (6) ◽  
pp. 2328-2335 ◽  
Author(s):  
Upkar Kumar ◽  
Sviatlana Viarbitskaya ◽  
Aurélien Cuche ◽  
Christian Girard ◽  
Sreenath Bolisetty ◽  
...  
Keyword(s):  
Signal Transmission ◽  
Optical Signal ◽  
Planar Channel
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