Page 560 - Fiber Optic Communications Fund

Index 541

gallium arsenide photodetectors, 192, 192–3, 197 shot noise limited systems, 352–3
Gaussian pulse, 65–7, 65–7, 86–9, 87–8 signal calculation, 354, 381–2
Gauss’s law, 3 sinc function, 357–8, 358
Gauss’s law, differential form of, 3, 4,6 single-branch, principles, 230–232, 231–2
Godard’s algorithms, 513 synchronous detection (FSK), 356–8, 357–8
Gordon–Mollenauer phase noise, 474–6 synchronous detection (OOK), 353–6
graded-index multi-mode fibers, 42–4, 43 synchronous detection (PSK), 351–3
group velocity, 26–31, 27 threshold, 362–3
guided modes, 46–51, 47, 49–50,54 total current, 350
heterojunction lasers, 124–5, 124–6, 128
half-wave voltage (switching voltage), 152 heterojunction phototransistor (HPT), 207
Helmholtz equation, 45 Hockham, G., 35
heterodyne receivers homodyne receivers
ASE limited systems, 352 asynchronous detection, 351
asynchronous detection, 351 average energy, 347, 349
asynchronous detection (FSK), 364–7 bit error ratio, 348, 349
asynchronous detection (OOK), 359–64, 360, current output, 346–7
364 detection, 347–8
BER, 357–8, 358 direct detection modulation scheme comparison,
bit energy, 354, 357 379–81, 380
bit transmission, 362–3, 366 fiber-optic channel noise, 346
electron charge, 355 field envelope, 347, 349
envelope detector outputs, 365–6 matched filters, 347
error probability, 355–6, 362–4, 364, 366–7, noise, 346, 386–7
367 normalized energy per bit, 348
fiber-optic link model, 350, 350–351 on–off keying, 349, 349
field envelopes, 356, 359 Parseval’s relations, 348, 386
frequency component, 361–2, 365 phase-shift keying (PSK), 347–8, 385–7
frequency-shift keying (FSK), 356–8, 357–8 power spectral density, 346, 347
Marcum Q-function, 364 Q factor/BER relationship, 348
matched filters, 351–2, 351–2, 356, 357, received signal power, 353
359–62, 360, 364–5, 381–2 scaling factor, 347
matched filter transfer function, 359 shot noise/thermal noise, 346
modulation schemes comparison, 366–7, 367 single-branch, principles, 229–30
noise calculation, 354–5 transmission system principles, 345–6, 346
orthogonal FSK, 358–9
orthogonal signals, 365
output sample, 362 IF estimation and compensation, 501–3,
pdf component, 362, 366 501–3
phase-key shifting (PSK), 351–3, 355–6 IFWM (intra-channel four-wave mixing), 419,
photocurrent, 350 454–7, 456–7, 463–6, 477
photocurrents, 356 IMDD systems, 445–8, 448
power spectral density (PSD), 350, 355, 361, impact ionization phenomenon, 207–8, 208
382–4 indium gallium arsenide, 192, 193, 203, 203–4,
received signal power, 353 211–2
Rician distribution, 362, 366 indium gallium arsenide phosphide, 192, 193, 203,
scaling factor, 350, 359, 360, 365 203–4, 211–2