A Review on Free Space Optics with Atmospheric and Geometrical Attenuation

2016 ◽  
Vol 37 (4) ◽  
Author(s):  
Suruchi Lath ◽  
Rakesh Goyal ◽  
Rajinder Singh Kaler
Keyword(s):  
Wireless Communication ◽  
Communication System ◽  
Electromagnetic Interference ◽  
Free Space ◽  
Short Distance ◽  
Free Space Optics ◽  
Narrow Beam ◽  
Energy Beam ◽  
Space Optics ◽  
Optical Cable

AbstractFree space optics (FSO) communication is a short-distance wireless communication system. It can be used where optical fiber cables cannot be implemented. In FSO, the energy beam is accumulated and transmitted through space instead of guiding through an optical cable. FSO communication provides data at a rate of Gbps; it is highly secure because it uses narrow beam to transmit data from transmitter to receiver, uses license-free operation, has no electromagnetic interference and has quick installation. This paper gives an overview of performance of FSO communication with environmental attenuation.

PAM-4 based long-range free-space-optics communication system with self injection locked QD-LD and RS codec

2020 ◽  
Vol 476 ◽  
pp. 126304
Author(s):  
Rahul Mukherjee ◽  
Khaleda Mallick ◽  
Bibhatsu Kuiri ◽  
Saikat Santra ◽  
Bubai Dutta ◽  
...  
Keyword(s):  
Long Range ◽  
Communication System ◽  
Free Space ◽  
Free Space Optics ◽  
Space Optics ◽  
Range Free

Empirical Evaluation of High-speed Cost-effective Ro-FSO System by Incorporating OCDMA-PDM Scheme under the Presence of Fog

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Sushank Chaudhary ◽  
Sunita Choudhary ◽  
Xuan Tang ◽  
Xian Wei
Keyword(s):  
Free Space ◽  
High Speed ◽  
Optical Network ◽  
Empirical Evaluation ◽  
Cost Effective ◽  
Free Space Optics ◽  
Space Optics ◽  
Optical Cable ◽  
Application Systems ◽  
Support Cost

AbstractRadio over free space optics (Ro-FSO) innovation saddles the vast limit of optical fiber and the portability from local to remote systems. To enhance the capacity of Ro-FSO systems without compromising the bandwidth, this work incorporates use of hybrid polarization division multiplexing (PDM) with optical code division multiplexing (OCDMA) schemes. Due to low deployment time and support cost, the vast majority of the current optical network application systems adopts free space optics (FSO) as the elective answer for suitably supplanting fiber optical cable. This study has incorporated PDM and OCDMA schemes to design a 50 Gbps Ro-FSO link. Ten channels, each with 5 Gbps of data, are transported via FSO link of 3500 m. In addition, the proposed PDM-OCDMA-Ro-FSO link is evaluated under various atmospheric commotions.

Transmitter with quantum cascade laser for free space optics communication system

2011 ◽  
Vol 59 (4) ◽  
pp. 419-423 ◽  
Author(s):  
M. Gutowska ◽  
D. Pierścińska ◽  
M. Nowakowski ◽  
K. Pierściński ◽  
D. Szabra ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Communication System ◽  
Free Space ◽  
Open Space ◽  
Spectral Characteristics ◽  
Average Power ◽  
Experimental Tests ◽  
Free Space Optics ◽  
Quantum Cascade ◽  
Space Optics

Transmitter with quantum cascade laser for free space optics communication system The paper presents results of experimental tests of the quantum cascade laser from Alpes Lasers company in terms of its application in the optic communication system in an open space. The measurements involved the current - voltage characteristics while measuring also the average power of emitted radiation, and spectral characteristics for different temperatures and different laser pulse durations. The duration of laser pulses was matched to parameters used in telecommunication interfaces. The construction of the transmitter module which uses the tested laser is also presented.

scholarly journals Free Space Optics Vs Radio Frequency Wireless Communication

2016 ◽  
Vol 8 (9) ◽  
pp. 1-8 ◽  
Author(s):  
Rayan A. Alsemmeari ◽  
◽  
Sheikh Tahir Bakhsh ◽  
Hani Alsemmeari
Keyword(s):  
Wireless Communication ◽  
Radio Frequency ◽  
Free Space ◽  
Free Space Optics ◽  
Space Optics

Hybrid Wireless Communication Networks: Integrating Free-Space Optics and WiFi

2016 ◽  
Author(s):  
Spencer Liverman ◽  
Qiwei Wang ◽  
Yu-Jung Chu ◽  
Arun Natarajan ◽  
Thinh Nguyen ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Communication Networks ◽  
Free Space ◽  
Free Space Optics ◽  
Wireless Communication Networks ◽  
Space Optics

Effects of Fog in Free-Space Optics Communication System

2017 ◽  
Author(s):  
Indira M. A. Almeida ◽  
Eduardo J. Aiub ◽  
Lúcia A. M. Saito ◽  
José A. J. Ribeiro
Keyword(s):  
Communication System ◽  
Free Space ◽  
Free Space Optics ◽  
Space Optics

scholarly journals Feasibility Analysis Of Free Space Earth To Satellite Optical Link In Tropical Region

2012 ◽  
Vol 12 (5) ◽  
Author(s):  
Norhanis Aida M. Nor ◽  
Md. Rafiqul Islam ◽  
Wajdi Al-Khateeb
Keyword(s):  
Electromagnetic Interference ◽  
Free Space ◽  
Elevation Angle ◽  
Rain Attenuation ◽  
Low Earth Orbit ◽  
Feasibility Analysis ◽  
Free Space Optics ◽  
Tropical Region ◽  
Earth Orbit ◽  
Space Optics

Free Space Optics (FSO) becomes a great attention because of the chances in transmitting data up to 2.5Gbps. There are a lot of advantages offered by FSO such as easily deployment with saving time and cost and no electromagnetic interference. In spite of the advantages, FSO has an uncontrolled drawback which is highly sensitive to atmospheric phenomena because uses air as tranmission medium. Current studies and researches are only focusing on FSO terrestrial link with short path length and based on data from temperate region. Therefore, this paper is aiming to provide feasibility analysis of FSO link from earth to satellite especially Low Earth Orbit (LEO) based on atmospheric data in tropical region. The analysis will include the losses from geometrical attenuation, absorption, scintillation, haze attenuation, and rain attenuation. ABSTRAK: Ruang Bebas Optik (Free Space Optics (FSO)) mendapat perhatian kerana kebolehannya memancarkan data pada kelajuan tinggi. Di sebalik kelebihannya, FSO amat sensitif terhadap fenomena atmosfera kerana ia menggunakan udara sebagai perantara transmisi. Penyelidikan dan kajian terkini hanya memfokus kepada jalinan darat FSO dengan kepanjangan jarak pendek dan bergantung kepada kawasan tenang.  Oleh itu, kertas ini menyasarkan untuk memberikan analisis kebolehlaksanaan  jalinan FSO dari bumi ke satelit terutamanya Orbit Rendah Bumi (Low Earth Orbit (LEO)) bergantung kepada data atmosfera di kawasan tropika. Analisa termasuklah kehilangannya akibat pengecilan geometri, penyerapan, kelipan, pelemahan jerebu dan pelemahan hujan.KEYWORDS:  feasibility; Free Space Optics; availability; atmospheric attenuation; beam divergence angle; elevation angle

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