Fiber optic in detail.
Core: in silica, molten quartz or plastic. In it, the optical waves propagate. Diameter: 50 or 62.5 µm for multimode fiber and 9 µm for single-mode fiber.
Optical case: Generally of the same materials as the core but with additives that confine the optical waves in the core.
The protective coating: it is usually made of plastic and ensures the mechanical protection of the fiber.
Types of optical fibers
Singlemode fiber: Potentially, this is the fiber that offers the greatest information transport capacity. It has a passband of the order of 100 GHz / km. The largest flows are achieved with this fiber, but it is also the most complex to the implant.
The drawing shows that only the rays that have a trajectory that follows the fiber axis can be transmitted, so it has earned the name of "single-mode" (propagation mode, or path of the light beam, unique). They are fibers that have the diameter of the core in the same order of magnitude as the wavelength of the optical signals they transmit, that is, about 5 to 8 mm.
If the core is made of a material whose refractive index is very different from that of the roof, then it is referred to as single-mode stepped fibers. The high flows that can be achieved constitute the main advantage of single-mode fibers since their small dimensions imply delicate handling and entail connection difficulties that are still poorly dominated.
Fiber optics jobs
Multimode gradual gradient index fiber: Multimode gradual gradient index fibers have a passband that reaches up to 500 MHz / km. Its principle is based on the fact that the index of refraction inside the core is not unique and decreases when it moves from the core to the roof.
The light rays are focused on the fiber axis, as can be seen in the drawing. These fibers allow reducing the dispersion between the different propagation modes through the fiber core. The multimode fiber of gradual gradient index of size 62.5 / 125 m (core diameter / shell diameter) is standardized, but other types of fibers can be found:
Core: in silica, molten quartz or plastic. In it, the optical waves propagate. Diameter: 50 or 62.5 µm for multimode fiber and 9 µm for single-mode fiber.
Optical case: Generally of the same materials as the core but with additives that confine the optical waves in the core.
The protective coating: it is usually made of plastic and ensures the mechanical protection of the fiber.
Types of optical fibers
Singlemode fiber: Potentially, this is the fiber that offers the greatest information transport capacity. It has a passband of the order of 100 GHz / km. The largest flows are achieved with this fiber, but it is also the most complex to the implant.
The drawing shows that only the rays that have a trajectory that follows the fiber axis can be transmitted, so it has earned the name of "single-mode" (propagation mode, or path of the light beam, unique). They are fibers that have the diameter of the core in the same order of magnitude as the wavelength of the optical signals they transmit, that is, about 5 to 8 mm.
If the core is made of a material whose refractive index is very different from that of the roof, then it is referred to as single-mode stepped fibers. The high flows that can be achieved constitute the main advantage of single-mode fibers since their small dimensions imply delicate handling and entail connection difficulties that are still poorly dominated.
Fiber optics jobs
Multimode gradual gradient index fiber: Multimode gradual gradient index fibers have a passband that reaches up to 500 MHz / km. Its principle is based on the fact that the index of refraction inside the core is not unique and decreases when it moves from the core to the roof.
The light rays are focused on the fiber axis, as can be seen in the drawing. These fibers allow reducing the dispersion between the different propagation modes through the fiber core. The multimode fiber of gradual gradient index of size 62.5 / 125 m (core diameter / shell diameter) is standardized, but other types of fibers can be found:
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