## Coherent and Nonlinear Lightwave CommunicationsThis is a practical source on recent developments in coherent and nonlinear lightwave communications. The book systematically presents up-to-date explanations of all the relevant physical principles and recent research in this emerging area. Providing an unparallelled engineering-level treatment (with 700 equations), this reference also describes the progression of coherent and nonlinear technology from yesterday's experimental field to today's practical applications tool. This work is intended as a tool for research telecommunication engineers, applications engineers working with broadband telecom systems and networks, and postgraduate students. |

### From inside the book

Results 1-3 of 54

Page 6

The quality of the coherent lightwave transmission is measured by a signal-to-

noise

signal-to-noise

...

The quality of the coherent lightwave transmission is measured by a signal-to-

noise

**ratio**increase (or receiver sensitivity improvement) in comparison with thesignal-to-noise

**ratio**of an ideal optical receiver. A signal-to-noise**ratio**only a few...

Page 98

modes and to produce a side-mode suppression

The

of the two laser mirrors, Tm is the

...

modes and to produce a side-mode suppression

**ratio**, R, of more than 20 dB.The

**ratio**R can be calculated as [30] where r\ and r2 are the power reflectivitiesof the two laser mirrors, Tm is the

**ratio**of the filter transmission between the side...

Page 208

The SNR, R\, for the amplified optical signal can be expressed as #i = ^222S (

8.18) To evaluate the

Since the value of gain, C, is relatively large, and the mean number of photons is

...

The SNR, R\, for the amplified optical signal can be expressed as #i = ^222S (

8.18) To evaluate the

**ratio**Ru according to (8.18), we can use (8.13) and (8.14).Since the value of gain, C, is relatively large, and the mean number of photons is

...

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### Contents

Coherent Optical Receiver Sensitivity | 15 |

Optical Transmitters for Coherent Lightwave Systems | 61 |

Optical Receivers for Coherent Lightwave Systems | 101 |

Copyright | |

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### Common terms and phrases

amplification coefficient amplitude applied Brillouin scattering carrier frequency Chapter characteristics coherent detection coherent lightwave system coherent optical receiver components corresponding defined depends detection scheme digit interval dispersion DPSK electric field energy equal equation erbium-doped fiber amplifiers error probability evaluated expressed Figure filter frequency shift Gaussian Hence heterodyne detection homodyne detection IEEE IEEE/OSA IM/DD incoming optical signal influence input laser amplifiers length Lett lightwave systems Lightwave Techn loss modulating signal multichannel nonlinear effects nonlinear lightwave system obtained optical amplifiers optical oscillator optical power optical transmitter optical-fiber parameters phase difference phase modulation phase noise phase shift photodetector photodiode photons polarization propagation PSK signals pump signal Raman amplification Raman amplifiers random ratio realization receiver sensitivity refractive index resonator scattered signal semiconductor laser signal power single-mode optical fiber soliton pulse soliton regime spectral linewidth spectrum spontaneous emission term thermal noise transmission system variance voltage width