of delay lines with overall dimensions 10–50 mm with delay times 1–50 μs within
the next 5-years period.
Authors of this book are initiators and pioneers of the idea to use the heating of
the support tube in the range from 1000 to 1950
C for manufacture of miniature RF
FODL for microwave oscillators with reduction of settling time of required temperature and with increased accuracy of temperature adjustment [3].
A progress of technologies of crude product manufacture for optical fibers with
application of high-temperature automated methods of heating of the quartz glass
blanks alloyed by a nitrogen, and synchronic displacement of plasma columns
along the blanks using of stabilized microwave oscillators will lead to creation of
ultra-miniature RF FODLs with overall dimensions less that 0.5 cm
3 with effective
delay more than 50 μs at transmitted oscillation bandwidth of 1–100 GHz.
For comparison, Figs. 2.15 and 2.16 show dimensions and types of RF FODL
with the optical fiber length of 10 km with dimensions used in OEOs.
We note (Figs. 2.15 and 2.16) that RF FODL geometric dimensions for the length
of 10 km with the delay 50 μs is about 100 Â 100 Â 20 (mm
3 ), and dimensions of the
optical disk resonator are 100 Â 100 Â 100 (μm)
3 . The record small dimensions of
RF FODL and optical disk resonators allow manufacturing of microwave and
mm-wave oscillators in the miniature implementation with relatively high characteristics in noises and frequency tuning.
At the modern stage of OEO technology development, the RF FODL overall
dimension almost coincide with overall dimensions of the disk dielectric resonator
from the leuco-sapphire with generation frequencies in the range of 10–12 GHz.
Fig. 2.15 (a) Maximal dimensions of resonators and delay lines used in modern high-stable OEOs
and microwave oscillators. (b) The plot of maximal overall dimensions’ variations of the fiber reels
in years. Dependence of the resonator size in years (delay time is 50 μs). (1) QR—the quartz
resonator, (2) SAWR—the resonator on surface acoustic waves, (3) CR—the caviar resonator of
electromagnetic waves, (4) DCR—the disk dielectric resonator from ceramic alloys, (5) DDRLS—
the disk dielectric resonator from leuco-sapphire, (6) YIGR—the YIR resonator, (7) RF FODL—
the fiber-optical delay line (delay time is 10–50 μs), (8) ODR—the optical disk resonator
54
2 Nanostructural Optoelectronic Oscillators with the Fiber-Optical Delay Line
the next 5-years period.
Authors of this book are initiators and pioneers of the idea to use the heating of
the support tube in the range from 1000 to 1950
C for manufacture of miniature RF
FODL for microwave oscillators with reduction of settling time of required temperature and with increased accuracy of temperature adjustment [3].
A progress of technologies of crude product manufacture for optical fibers with
application of high-temperature automated methods of heating of the quartz glass
blanks alloyed by a nitrogen, and synchronic displacement of plasma columns
along the blanks using of stabilized microwave oscillators will lead to creation of
ultra-miniature RF FODLs with overall dimensions less that 0.5 cm
3 with effective
delay more than 50 μs at transmitted oscillation bandwidth of 1–100 GHz.
For comparison, Figs. 2.15 and 2.16 show dimensions and types of RF FODL
with the optical fiber length of 10 km with dimensions used in OEOs.
We note (Figs. 2.15 and 2.16) that RF FODL geometric dimensions for the length
of 10 km with the delay 50 μs is about 100 Â 100 Â 20 (mm
3 ), and dimensions of the
optical disk resonator are 100 Â 100 Â 100 (μm)
3 . The record small dimensions of
RF FODL and optical disk resonators allow manufacturing of microwave and
mm-wave oscillators in the miniature implementation with relatively high characteristics in noises and frequency tuning.
At the modern stage of OEO technology development, the RF FODL overall
dimension almost coincide with overall dimensions of the disk dielectric resonator
from the leuco-sapphire with generation frequencies in the range of 10–12 GHz.
Fig. 2.15 (a) Maximal dimensions of resonators and delay lines used in modern high-stable OEOs
and microwave oscillators. (b) The plot of maximal overall dimensions’ variations of the fiber reels
in years. Dependence of the resonator size in years (delay time is 50 μs). (1) QR—the quartz
resonator, (2) SAWR—the resonator on surface acoustic waves, (3) CR—the caviar resonator of
electromagnetic waves, (4) DCR—the disk dielectric resonator from ceramic alloys, (5) DDRLS—
the disk dielectric resonator from leuco-sapphire, (6) YIGR—the YIR resonator, (7) RF FODL—
the fiber-optical delay line (delay time is 10–50 μs), (8) ODR—the optical disk resonator
54
2 Nanostructural Optoelectronic Oscillators with the Fiber-Optical Delay Line