Fig. 2.12 The disk electro-optical modulator (the disk radius is 2 mm) on the crystal of LiNbO 3 (a)
and the optical nano-toroidal resonator (the disk radius is 50 μm) from SiO 2 (b) with Q-factor more
than 1,000,000
Fig. 2.13 Profiles of commercial micro-structured “perforated” optical fibers with the nanodimension structure of the light-guiding core (a–c). (d) The plot of functions of traditional optical
fiber damping and photo-crystal (or perforated) fibers vs. the bend radius for different fibers: (1) The
traditional fiber of G.652 type. The single-mode fiber with core diameter about 10 μm. Variants of
this fiber without water peak: All Wave (company OSF), SMF-28e (Corning), SMR (Pirelli) within
the limits of G.652C recommendation; (2) The fiber of G.657 type with reduced bend damping.
Similar fibers are developed by Corning and OFS; (3) Clear—fibers from Corning of SMF-28e XB
(Extra Bend) type with decreased bend attenuation, and the fiber with nanostructured core
ClearCurve with strongly reduced bend attenuation; (4) The third type of perforated fibers—the
light guided fiber with additional holes (CBBO), or hole-assisted light guided fiber (HALF); (e) The
structure of HALF–PCF fiber
46
2 Nanostructural Optoelectronic Oscillators with the Fiber-Optical Delay Line
and the optical nano-toroidal resonator (the disk radius is 50 μm) from SiO 2 (b) with Q-factor more
than 1,000,000
Fig. 2.13 Profiles of commercial micro-structured “perforated” optical fibers with the nanodimension structure of the light-guiding core (a–c). (d) The plot of functions of traditional optical
fiber damping and photo-crystal (or perforated) fibers vs. the bend radius for different fibers: (1) The
traditional fiber of G.652 type. The single-mode fiber with core diameter about 10 μm. Variants of
this fiber without water peak: All Wave (company OSF), SMF-28e (Corning), SMR (Pirelli) within
the limits of G.652C recommendation; (2) The fiber of G.657 type with reduced bend damping.
Similar fibers are developed by Corning and OFS; (3) Clear—fibers from Corning of SMF-28e XB
(Extra Bend) type with decreased bend attenuation, and the fiber with nanostructured core
ClearCurve with strongly reduced bend attenuation; (4) The third type of perforated fibers—the
light guided fiber with additional holes (CBBO), or hole-assisted light guided fiber (HALF); (e) The
structure of HALF–PCF fiber
46
2 Nanostructural Optoelectronic Oscillators with the Fiber-Optical Delay Line