Optical Fiber CommunicationsThe third edition of this popular text and reference book presents the fundamental principles for understanding and applying optical fiber technology to sophisticated modern telecommunication systems.. Optical-fiber-based telecommunication networks have become a major information-transmission-system, with high capacity links encircling the globe in both terrestrial and undersea installations. Numerous passive and active optical devices within these links perform complex transmission and networking functions in the optical domain, such as signal amplification, restoration, routing, and switching. Along with the need to understand the functions of these devices comes the necessity to measure both component and network performance, and to model and stimulate the complex behavior of reliable high-capacity networks. |
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Page 39
2 - 5 - 1 Graded - Index Numerical Aperture ( NA ) The determination of the NA for
graded - index fibers is more complex than for step - index fibers . In graded -
index fibers the NA is a function of position across the core end face . This is in ...
2 - 5 - 1 Graded - Index Numerical Aperture ( NA ) The determination of the NA for
graded - index fibers is more complex than for step - index fibers . In graded -
index fibers the NA is a function of position across the core end face . This is in ...
Page 131
Since the numerical aperture is constant across the end faces of the two fibers ,
the optical power coupled from one fiber to another is simply proportional to the
common area Acomm of the two fiber cores . It is straightforward to show that this
is ...
Since the numerical aperture is constant across the end faces of the two fibers ,
the optical power coupled from one fiber to another is simply proportional to the
common area Acomm of the two fiber cores . It is straightforward to show that this
is ...
Page 133
In area A2 the emitting fiber has a larger numerical aperture than the receiving
fiber . This means that the receiving fiber will accept only that fraction of the
emitted optical power that falls within its own numerical aperture . This power can
be ...
In area A2 the emitting fiber has a larger numerical aperture than the receiving
fiber . This means that the receiving fiber will accept only that fraction of the
emitted optical power that falls within its own numerical aperture . This power can
be ...
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Contents
Structures and Waveguiding | 12 |
Signal Degradation in Optical Fibers | 48 |
Optical Sources | 80 |
Copyright | |
10 other sections not shown
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absorption active addition amplifier angle aperture applications approximately assume attenuation avalanche band bandwidth bias cable carrier characteristics cladding communication components condition consider constant core coupling defined density depends detector determined device dispersion distance distortion effects efficiency electric Electron emitting energy equal equation example expression factor field Figure frequency function gain given gives glass graded-index guided IEEE important increases input laser diodes length less light limit loss material measured mechanical method modes modulation noise occurs operating optical fiber optical power optical source output parameter percent photodetector photodiode photon propagation pulse quantum range ratio receiver referred reflection refractive region respectively response rise shown in Fig signal spectral surface technique temperature transmission transmitter values various voltage wave waveguide wavelength width York