Page 566 - Fiber Optic Communications Fund

Index 547

optical power, dBm units, 61 impulse response, matched filter, 341
parabolic index profile, 43, 43,44 matched filter, 340–341, 341
phase speed, 53 matched filter realization, 342–3, 342–4
polarization mode dispersion, 78–9 noise variance, 336, 339–40, 344
power/dBm unit relationships, 60, 62–7, 60–67, optimum threshold, 338, 341, 344
83 Parseval’s relations, 340
power reflection coefficient, 37, 37 power spectral density, 335, 342
propagation constants, 48–50, 49, 54, 57–60, pulse energy, 344–5
60, 75, 82 received signal, 336
pulse broadening, 39, 40,57 signal component, 336
pulse compression, 86, 87 time-shifting property, 344–5
radiation modes, 46, 54–5, 55 transfer function, 339, 339–41, 341
Rayleigh scattering, 70, 71, 70–71 orthogonal frequency-division multiplexing
ray-optics theory, 39 (OFDM)
ray propagation in fibers, 36–43, 36–44 bandwidth, 403, 414–5
rectangular pulse, 62–4, 62–4 block diagram, 404
refractive index difference, 38–9 carrier frequencies, 403–4
refractive index profile, 35, 36 cyclic prefix, 405–6
single-mode fibers (See single-mode fibers) DFT, 404
spot size, 79 digital-to-analog converter (DAC), 406, 406–7
step-index fiber, 35, 43–4 dispersion, 404–5, 405
step-index fiber modes, 44–57, 45, 47, 49–53, experiments, 408–9
55, 57 frequency separation, 403
Taylor expansion, 76 IDFT, 404
Taylor series, 58–9 IQ modulator, 406–7, 407
total internal reflection, 38, 38, 39, 40 ISI in, 402
total power calculation, 50–51, 51–3, 60–61 Mach–Zehnder modulator, 407, 407
triangular index profile, 43 polarization, 414–15
2-dimensional planar waveguide analogy, 53–4 principles, 402, 402–6, 405–6
universal curve, 49 QAM-16, 406
zero dispersion wavelength, 75 receiver, 407–8, 408
optical receivers. See photodetectors signal power, 414–415
optical signal-to-noise ratio (OSNR), 262–3, spectral efficiency, 414–5
317–18, 321–2 subcarriers, 405, 405–6, 413–5
optical time-division multiplexing (OTDM), transmitter, 406, 406–7
409–10, 409–12 orthogonal FSK, 358–9
optimum binary receivers orthonormal functions, 472
additive white Gaussian noise (AWGN) channel,
335 Parseval’s relations
arbitrary receiver filter error probability, 345 FSK systems, 372
bit error rate (BER), 337–9, 339, 344 homodyne receivers, 348, 386
bit transmission, 336–7, 337 optimum binary receivers, 340
complementary error function, 338–9 WDM systems, 394
conditional pdf, 336–7, 337 Parseval’s theorem, 289
correlation receivers, 342, 342–4 partial response signals
filters, 335–6, 339–40 alternate mark inversion, 169–72, 170–172
generalized model, 335–41, 336–7, 339, 341 correlative coding, 164