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 85
... emission wavelength A in micrometers can be expressed as a function of the band gap energy E , in electron volts by the equation 1.0 0.5 36 nm 0 750 770 790 810 λ ( μη ) = 8 1.240 Eg ( eV ) 810 - nm peak 830 850 870 Emission wavelength ...
... emission wavelength A in micrometers can be expressed as a function of the band gap energy E , in electron volts by the equation 1.0 0.5 36 nm 0 750 770 790 810 λ ( μη ) = 8 1.240 Eg ( eV ) 810 - nm peak 830 850 870 Emission wavelength ...
Page 94
... emission , and stimulated emission . These three processes are represented by the simple two - energy - level diagrams in Fig . 4-10 , where E , is the ground - state energy and E2 is the excited - state energy . According to Planck's ...
... emission , and stimulated emission . These three processes are represented by the simple two - energy - level diagrams in Fig . 4-10 , where E , is the ground - state energy and E2 is the excited - state energy . According to Planck's ...
Page 95
... emission is known as stimulated emission . In thermal equilibrium the density of excited electrons is very small . Most photons incident on the system will therefore be absorbed , so that stimulated emission is essentially negligible ...
... emission is known as stimulated emission . In thermal equilibrium the density of excited electrons is very small . Most photons incident on the system will therefore be absorbed , so that stimulated emission is essentially negligible ...
Contents
Structures and Waveguiding | 12 |
Signal Degradation in Optical Fibers | 48 |
Optical Sources | 80 |
Copyright | |
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absorption amplifier angle Appl attenuation avalanche photodiode band gap bandwidth Bell Sys bias cable carrier Chap cladding coefficient communication systems components connector coupler coupling coupling loss data rate dB/km decibels density detector device distortion electric electromagnetic emission emitting energy equation fiber core fiber end fiber optic Figure frequency function given by Eq glass fibers graded-index fiber IEEE Trans input laser diodes layer Lett lifetime light source loss material dispersion measured method modal modulation multimode fibers n₁ n₂ numerical aperture operating optical output optical power optical signal optical source optical waveguide output power parameter percent photodetector photon pin photodiode preform propagation quantum efficiency radiation radius ratio receiver recombination refractive index refractive-index refractive-index profile semiconductor shown in Fig silica single-mode spectral width splice star coupler step-index fiber surface T-coupler technique temperature thermal noise transmitter values voltage wave wavelength