Fig. 7.22 Transients of the
normalized amplitude U(t)
and the normalized
frequency f t
ð Þ ¼ _
Ψ t
ð Þ of
OEO with combined RF
FODL generation. The
normalized time t is
dimensionless and
normalized to the variable
T EF ¼ [(T 1FOS + T 2FOS )/20].
The offset θ ¼ 0.03 at
A ¼ 0.4; 0.5; 0.6; 0.7; 0.8.
(a) The excitation reserve
δ ¼ 0.5 at the excitation
coefficient of light guides is
A ¼ 0.2; 0.3; 0.4; В ¼ 1 À А.
(b) The excitation reserve
δ ¼ 0.5 at A ¼ 0.4; 0.5; 0.6;
0.7; 0.8. (c) The excitation
reserve δ ¼ 1.15
7.4 Frequency Control in OEO with RF FODL with Two Optical Fibers
415