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 81
... DPSK Signals 48 4 Direct 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 ...
... SIGNAL 111 1 Relative Intensity Noise 112 2 2.1 Phase Error for Differentially Detected Signals Delay Phase Error for DPSK Signals 114 114 2.2 Phase Error in CPFSK and MSK Signals 117 3 Laser Phase Noise 118 ... DPSK Signals with Finite ix.
... DPSK Signals 276 2.5 Single Interferer for On - Off Keying Signals 279 3 Cross - Phase Modulation Induced Nonlinear Phase Noise 3.1 Variance of Nonlinear Phase Noise 282 3.2 Error Probability for DPSK Signals 289 4 Cross - Phase ...
... signal is used to carry information . Phase - modulated optical communications , or coherent optical communications ... DPSK ) and differential quadra- ture phase - shift keying ( DQPSK ) signal . With 3 dB better receiver sen- sitivity ...
... detection , the system is called coherent optical communication systems . For example , differential phase - shift keying ( DPSK ) system is a noncoherent digital communication system ( Proakis , 2000 ) but a coherent optical commu ...
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 |