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 92
... Frequency Modulation of a Semiconductor Laser 50 5 Summary 52 3. COHERENT OPTICAL RECEIVERS AND IDEAL PERFORMANCE 1 Basic Coherent Receiver Structures 1.1 1.2 1.3 1.4 1.5 2 2.1 Single - Branch Receiver Balanced Receiver Quadrature ...
... frequency of an optical signal is used to carry information . Phase - modulated optical communications , or coherent optical communications , have been studied for a long time since the early date of optical communications . However ...
... frequency of an optical carrier is used . In order to transmit more information in a single optical carrier or a single WDM channel , the phase of an optical carrier must be ex- plored . In this chapter , we will briefly explain the ...
... frequency - division multi- plexed ( FDM ) channels in the intensity of the optical carrier . Subcarrier multiplexing is mostly for vidco distribution , but may also be used for high - speed digital data ( Hui et al . , 2002 ) . Hybrid ...
... frequency noise of the 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 ...
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 |