Phase-Modulated Optical Communication SystemsFiber-optic communication systems have revolutionized our telecommunication infrastructures – currently, almost all telephone land-line, cellular, and internet communications must travel via some form of optical fibers. In these transmission systems, neither the phase nor frequency of the optical signal carries information – only the intensity of the signal is used. To transmit more information in a single optical carrier, the phase of the optical carrier must be explored. As a result, there is renewed interest in phase-modulated optical communications, mainly in direct-detection DPSK signals for long-haul optical communication systems. When optical amplifiers are used to maintain certain signal level among the fiber link, the system is limited by amplifier noises and fiber nonlinearities. Phase-Modulated Optical Communication Systems surveys this newly popular area, covering the following topics: - The transmitter and receiver for phase-modulated coherent lightwave systems - Method for performance analysis of phase-modulated optical signals - Direct-detection DPSK signal with fiber nonlinearities, degraded by nonlinear phase noise and intrachannel effects - Wavelength-division-multiplexed direct-detection DPSK signals - Multi-level phase-modulated optical signals, such as the four-phase DQPSK signal. Graduate students, professional engineers, and researchers will all benefit from this updated treatment of an important topic in the optical communications field. |
From inside the book
Results 1-5 of 37
... Transmitter of ( D ) QPSK Signals 309 3 Synchronous Detection of Multilevel Signals 316 3.1 M - ary PSK Signal 316 3.2 Quadrature Amplitude Modulation 318 4 Direct - Detection of DQPSK Signal 320 4.1 Receiver Structure and Ideal ...
... transmitter and receiver for on - off keying systems are very simple , may be the simplest among all possibilities . Figure 1.1 shows a typical long - haul IMDD system . The transmitted data are modulated into the optical carrier using ...
... transmitter . Light - emitting diode can also be used for low - speed applications , mostly for multimode fiber with a large core to alleviate the alignment requirement . 2 . Phase - Modulated Optical Communications The low - loss ...
... transmitter laser adds directly to the phase and frequency of the optical carrier . Both phase or frequency noise of a laser must be reduced for phase - modulated or coherent optical communica- tions . Figure 1.2 shows a typical ...
... transmitter laser . In homodyne receiver , the optical frequency of LO laser should be the same as that of the transmitter laser , for example , by frequency tracking . All receivers in Fig . 1.3 usc a balanced receiver to sum the two ...
Contents
7 | |
20 | |
22 | |
COHERENT OPTICAL RECEIVERS | 53 |
Performance of Synchronous Receivers | 72 |
4 | 84 |
5 | 97 |
IMPAIRMENT TO OPTICAL SIGNAL | 111 |
B Joint Characteristic Function | 237 |
INTRACHANNEL PULSETOPULSE INTERACTION | 245 |
Nonlinear Phase Noise Versus Intrachannel | 249 |
FourWaveMixing | 257 |
WAVELENGTHDIVISIONMULTIPLEXED | 267 |
Summary | 300 |
3 | 308 |
PHASEMODULATED SOLITON SIGNALS 335 | 334 |
NONLINEAR PHASE NOISE | 143 |
Exact Error Probability for Distributed Systems | 163 |
COMPENSATION OF NONLINEAR PHASE NOISE | 189 |
3 | 200 |
6 | 230 |
CAPACITY OF OPTICAL CHANNELS | 353 |
Bibliography | 385 |
Index | 423 |