7.4.4 The Frequency Control of OEO with the Differential
RF FODL
As shown in Chaps. 2 and 3 of this book, OEO is the promising low-noise source of
microwave and mm-wave oscillations. At the same time, for practical utilization of
OEO, we must, on the one hand, develop and investigate for the steady state of the
optoelectronic methods of frequency control, which are nontraditional for RF oscillators, while, on the other hand, we must analyze the long-term frequency instability
of OEO. The analysis of methods of the frequency control and the problem of the
long-term frequency instability are tightly connected, because they are related with
Fig. 7.24 The functional structure with the frequency control of OEO with differential RF FODL
with the directional coupler of Y-type (a). Calculated frequency (b) and amplitude (c) functions of
OEO with differential RF FODL with the directional coupler of Y-type
7.4 Frequency Control in OEO with RF FODL with Two Optical Fibers
419
RF FODL
As shown in Chaps. 2 and 3 of this book, OEO is the promising low-noise source of
microwave and mm-wave oscillations. At the same time, for practical utilization of
OEO, we must, on the one hand, develop and investigate for the steady state of the
optoelectronic methods of frequency control, which are nontraditional for RF oscillators, while, on the other hand, we must analyze the long-term frequency instability
of OEO. The analysis of methods of the frequency control and the problem of the
long-term frequency instability are tightly connected, because they are related with
Fig. 7.24 The functional structure with the frequency control of OEO with differential RF FODL
with the directional coupler of Y-type (a). Calculated frequency (b) and amplitude (c) functions of
OEO with differential RF FODL with the directional coupler of Y-type
7.4 Frequency Control in OEO with RF FODL with Two Optical Fibers
419