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 32
... DQPSK Signal 320 4.1 Receiver Structure and Ideal Performance 320 4.2 Impairment to DQPSK Signals 322 4.3 DQPSK Precoder 328 5 Direct - Detection of Multilevel On - Off Keying Signals 330 6 Comparison of Multilevel Signals 332 10. PHASE ...
... ( DQPSK ) signal . With 3 dB better receiver sen- sitivity and improved tolerance to fiber nonlinearities , RZ - DPSK signal becomes the emerging transmission format for long - haul and ultra - long- haul lightwave transmissions . DQPSK ...
... , 2003c , Rasmussen et al . , 2003 , Zhu et al . , 2003 ) for long - haul transmission systems , mostly DPSK sig- nal with RZ pulses . Differential quadrature phase - shift keying ( DQPSK ) N spans TX 1 RX 1 Fiber TX 2 RX. Introduction 9.
... DQPSK experiments in Table 1.3 , the focus is to improve the spectral efficiency to 1.6 b / s / Hz or higher ( Cho et al . , 2004a , b ) . Other than Gnauck et al . ( 2003b ) , there are also activities to increase the data rate per ...
Keang-Po Ho. Table 1.3 . Selected Recent DQPSK Experimental Demonstrations . Year Data Channel Total Distance Capacity Rate Number Rate Channel Reference Space Comments ( Gb / s ) ( Gb / s ) ( km ) ( Tb / s - km ) ( GHz ) 2002 20.0 1 20 ...
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 |