6.5.14 Natural Line Width and PSD of the Phase Noise
of OEO MZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
6.5.15 Approximate Expression for the Suppression
Coefficient and PSD in OEO MZ . . . . . . . . . . . . . . . . . 345
6.6
Analog Modeling of OEO MZ . . . . . . . . . . . . . . . . . . . . . . . . . . 348
6.6.1
Description of the Analog Model . . . . . . . . . . . . . . . . . 348
6.6.2
Analog Modeling of the Process Formation of the
Oscillation Spectrum in OEO MZ in Transients . . . . . . . 351
6.6.3
Influence of the Material’s Refraction Index
Dispersion of the Optical Fiber upon PSD
of the Phase Noise in OEO MZ . . . . . . . . . . . . . . . . . . . 351
6.6.4
Comparison of the “Comb Character” Effect
in OEO MZ Spectrum at Strong FOS Dispersion
with the Optical Spectrum in Semiconductor Lasers . . . . 355
6.7
Formation of the OEO MZ Oscillation Spectrum . . . . . . . . . . . . 355
6.7.1
PSD of the Phase Noise in OEO MZ as the Convolution
of Spectra of the Laser Optical Oscillations and RF
Oscillations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
6.7.2
Oscillations Spectrum in the OEO Closed
Feedback Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
6.7.3
Influence of the Photon–Electron Resonance
of QWLD on PSD of the Phase Noise . . . . . . . . . . . . . . 357
6.7.4
Limit Values of PSD of the Phase Noise . . . . . . . . . . . . 363
6.8
Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366
7 Optoelectronic oscillator (OEO) as the Time and Spatial
Correlator of Random Variables with Differential Delay Line . . . . . 367
7.1
OEO as the Time and Spatial Correlator of Random
Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367
7.1.1
The Influence of the Coherence and the Width
of the Laser Spectral Line on the PSD of the Phase
Noise in OEO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370
7.2
The Model of the Dielectric Waveguide Structure of the
Laser and the Optical Channel . . . . . . . . . . . . . . . . . . . . . . . . . . 375
7.2.1
Asymmetrical Distribution of the Permittivity . . . . . . . . 378
7.2.2
The Field in the Near Zone for the Main Mode . . . . . . . 381
7.2.3
The Model of the Nonsymmetric Waveguide . . . . . . . . . 382
7.2.4
Plots of the Symmetric Distribution of the Field
in the Far Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384
7.2.5
Plots of the Nonsymmetric Distribution of the Field
in the Far Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 386
7.2.6
3D Plots of Symmetrical and Nonsymmetrical Field
Distribution in the Far Zone . . . . . . . . . . . . . . . . . . . . . 386
Contents
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