Pakistan, Iran, Egypt, etc.) participate in investigations. But, many interesting issues
of the unique device operation are not yet discovered and not understandable to the
wide circle of researchers till these days. It is caused by the fact that OEO combines
two oscillating process, which flow in different ranges: radio-frequency and optical.
It requires from the researcher the necessary store of knowledge not only in optics,
quantum electronics, but in fundamentals of the nonlinear oscillations theory of the
radio-frequency oscillators, statistical radio engineering, optimal reception
approaches.
In this book, authors discover “mysteries” of this device to readers and describe of
the OEO noise theory, explain the methods of ultralow phase noise oscillation
obtaining. Not only descriptions of the basing structures of OEO are discussed in
this book, but authors open the complicate physical phenomena occurring in the
laser, and how they influence on characteristics and properties of OEO.
The new approach of authors to investigation of this device consists in laser
examination in OEO as the main element: the energy source and the main source of
then phase noise. At that, authors consider the laser (or the quantum-well laser
diode—QWLD) physics on the base of semi-classical equations (Haken G.),
together with the laser emission modulation methods. Then authors offer the fluctuation model of the OEO generation process, in which not only noises of the RF
amplifier and the photodetector, but phase noises of the laser diode with Langevinian
sources.
Authors expand before readers of the principal new picture for the truth search at
the OEO investigation. They use different methods of the complicate quantumelectronic device research. On the one hand, authors enough fully and accurately
described the study of the radio-frequency single-dimension OEO model as the
oscillator with the high-Q delay line. On the other hand, authors examine of OEO
as the random quantity correlator, in which the noise suppression occurs not only
owing to the high-Q delay line, but due to the statistical process of combining of
different optical harmonics. Authors propose to study the influence upon the frequency, the amplitude and noise properties of the complicate optoelectronic channel
including the fiber-optical channel, which contains a laser, a modulator, and the
optical fiber.
The specific issue of this book description is the offered theory (on the base of
Epstein model of the electromagnetic oscillation representation) taking into account
irregularities of different optical channels. Such a theory, based on Maxwell equations, gives representations about dependences of amplitude and phase of optical
oscillations in the Mach–Zehnder modulator.
Authors investigated in this book of the power spectral density of the phase noise
of two types of OEO and made important conclusions on its application and on
technologies of low-noise sources of microwave and mm-wave oscillations. The
advantage of this book is combination of the strict mathematical methods for
analysis and solutions of differential equations based on the Evtianov method
(developed at MPEI department) with the clear enough description supported by
manifold illustrations (more than 150 figures).
viii
Foreword
of the unique device operation are not yet discovered and not understandable to the
wide circle of researchers till these days. It is caused by the fact that OEO combines
two oscillating process, which flow in different ranges: radio-frequency and optical.
It requires from the researcher the necessary store of knowledge not only in optics,
quantum electronics, but in fundamentals of the nonlinear oscillations theory of the
radio-frequency oscillators, statistical radio engineering, optimal reception
approaches.
In this book, authors discover “mysteries” of this device to readers and describe of
the OEO noise theory, explain the methods of ultralow phase noise oscillation
obtaining. Not only descriptions of the basing structures of OEO are discussed in
this book, but authors open the complicate physical phenomena occurring in the
laser, and how they influence on characteristics and properties of OEO.
The new approach of authors to investigation of this device consists in laser
examination in OEO as the main element: the energy source and the main source of
then phase noise. At that, authors consider the laser (or the quantum-well laser
diode—QWLD) physics on the base of semi-classical equations (Haken G.),
together with the laser emission modulation methods. Then authors offer the fluctuation model of the OEO generation process, in which not only noises of the RF
amplifier and the photodetector, but phase noises of the laser diode with Langevinian
sources.
Authors expand before readers of the principal new picture for the truth search at
the OEO investigation. They use different methods of the complicate quantumelectronic device research. On the one hand, authors enough fully and accurately
described the study of the radio-frequency single-dimension OEO model as the
oscillator with the high-Q delay line. On the other hand, authors examine of OEO
as the random quantity correlator, in which the noise suppression occurs not only
owing to the high-Q delay line, but due to the statistical process of combining of
different optical harmonics. Authors propose to study the influence upon the frequency, the amplitude and noise properties of the complicate optoelectronic channel
including the fiber-optical channel, which contains a laser, a modulator, and the
optical fiber.
The specific issue of this book description is the offered theory (on the base of
Epstein model of the electromagnetic oscillation representation) taking into account
irregularities of different optical channels. Such a theory, based on Maxwell equations, gives representations about dependences of amplitude and phase of optical
oscillations in the Mach–Zehnder modulator.
Authors investigated in this book of the power spectral density of the phase noise
of two types of OEO and made important conclusions on its application and on
technologies of low-noise sources of microwave and mm-wave oscillations. The
advantage of this book is combination of the strict mathematical methods for
analysis and solutions of differential equations based on the Evtianov method
(developed at MPEI department) with the clear enough description supported by
manifold illustrations (more than 150 figures).
viii
Foreword