ABSTRACT
Satellite crosslinks generally require narrower bandwidths for
increased power concentration. We can increase the power concentration
by increasing the cross page link frequency with the same size antenna. But
the source technology and the modulation hardware required at these
higher frequency bands are still in the development stage. Use of
optical frequencies will help to overcome this problem with the
availability of feasible light sources and the existence of ....etc

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CHAPTER 1
INTRODUCTION

Communication links between space crafts is an important element of space infrastructure, particularly where such links allow a major reduction in the number of earth stations needed to service the system. An example of an inter orbit page link for relaying data from LEO space craft to ground is shown in the figure below



Interorbit page link for relating data from LEO spacecraft to ground

Fig. 1
Inter orbit page link for relaying data from LEO space craft to ground.


The above figure represents a ....etc

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Abstract
With the improvements in semiconductors optical free space communication has become n attractive alternative to existing signal conducts as fibre or wireless (RF). It offers high data rates and is much less expensive than underground fibre. But there are a few restrictions, which may mean it remains an alternative. Many engineers are familiar with one of two successful existing technologies for data communication:

(1) Guided wave (e.g. fibre optics) and (2) wireless free space communication (e.g. RF). Fibre optics offers extremely hig ....etc

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Free space optical communications is a line-of-sight (LOS) technology that transmits a modulated beam of visible or infrared light through the atmosphere for broadband communications. In a manner similar to fiber optical communications, free space optics uses a light emitting diode (LED) or laser (light amplification by stimulated emission of radiation) point source for data transmission. However, in free space optics, an energy beam is collimated and transmitted through space rather than being guided through an optical cable. These beams of li ....etc

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Reported by: Edward Yin
Student ID: 8920213

Fiber-Optic Communication System Introduction
First, the history of optical fiber communication
Modern optical fiber communication development began in the 1960s, while making the optical has become the main force of the present and future of communication is based upon our two events of excitation: first, in 1960 the U.S. physicist de Umenoto (Theodore Harold Maiman) succeeded in making the ruby oscillation have a laser light. The second was de 1966, scientists Charles Kao (Charles Ka ....etc

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pooja raju
Ppt of OPTICAL OFDM FOR HIGH SPEED WIRELESS OPTICAL COMMUNICATION
how to prepare ppt on this seminar topic? ....etc

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Presented By:
WIRELESS OPTICAL COMMUNICATION
Adicherla Jayakar,4th B.E, E.C.E Raja Harsha Vardhan,4th B.E, E.C.E
Deccan College of Engg & Tech, Hyderabad, A.P


ABSTRACT
This paper deals with the Wireless Optical Communication (WOC). In this paper we mainly discuss the problems with the conventional methods of communication such as Permissions, License fees, Lack of International standardization, Wastage of power and Security and how this new technology of WOC can be used to overcome these problems, al ....etc

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To get full information or details of optical communication based counter please have a look on the pages

http://seminarsprojects.net/Thread-optical-fiber-communication-full-report?pid=11812&mode=threaded

http://seminarsprojects.net/Thread-optical-fiber-communication?pid=27277&mode=threaded

http://seminarsprojects.net/Thread-optical-fiber-communication?pid=67616&mode=threaded

http://seminarsprojects.net/Thread-optical-fiber-communication-full-report

http://seminarsprojects.net/Thread-optical-fiber-communication-full-report?pid=13756&mode= ....etc

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OPTICAL COMMUNICATION



INTRODUCTION

Today's telecommunications service providers are faced with what appears to be an insoluble problem. They must maintain and even increase profitability, while responding to an exponential growth in demand with networks that are even more complex and costly to deploy and maintain.
Since the requirements for both profitability and the ability to offer new, revenue-rich services are givens, the solution must be found in the networks Service providers must find a w ....etc

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INTRODUCTION
The ocean covers some 70% of our planet and is a rich fund of information on global health, climate change, and resource degradation. Studying marine ecosystems, ensuring port security, and monitoring oil pipelines and leaks of hazardous materials in transit are some of the specific reasons for profiling the concentration and distribution of substances in the ocean.
Considerable research has been conducted to develop and assess methods of sensing the ocean on spatial and temporal scales ranging fr ....etc

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