Fiber optic communications systems use much less power. First, most of the sources used in the optical fiber are controlled at an adjusted modulation rate, not at maximum power. Internal wiring with multimode fiber and LED sources to have low power levels, too low to be dangerous. High-speed internal connections use vertical-cavity laser and surface emission (VCSEL), which still have low power levels and are generally not harmful. Most telecommunications companies use laser connections with slightly higher power levels than VCSELs.
There are two types of connections that have high power, up to 100 times more than other telecommunications systems, which are cable television or video connections at 1550 nm and long-distance telecommunications connections that use DWDM (division multiplexing dense wavelength). Cable television connections or video connections used in fiber to the home (FTTH - read more) can use amplifiers (read more) that increase power to really high levels, potentially dangerous to the eyes. DWDM telecommunications connections are used in very long-distance connections (read more). Not only do they use fiber amplifiers to increase power, but they also have many different signals operating at different wavelengths on the same single-mode fiber. Any wavelength would not be a problem, but the sum of 16, 32 or 64 individual wavelengths can be very powerful.
The next problem is to focus on the light of fiber in your eye. The light within an optical fiber propagates in a cone shape, whose angle is defined by the characteristics of the fiber transmission determined by the numerical aperture. As your eye moves away from the end of the fiber, the amount of radiation it receives is inversely proportional to the square of the distance; that is, at twice the distance, the power is reduced by 1/4, ten times the distance reduces the power to 1%. It should not be so far to reduce power levels to low levels not harmful.
Also Read: fiber optic jobs salary
As the beam of light that comes out of the optical fiber does it conically, the eye cannot focus it on the retina. This does not happen with the typical laboratory laser or laser pointer, which emits a narrow and directed beam of light, which does not spread; a beam that can easily focus on the retina and cause temporary blindness.
There are two types of connections that have high power, up to 100 times more than other telecommunications systems, which are cable television or video connections at 1550 nm and long-distance telecommunications connections that use DWDM (division multiplexing dense wavelength). Cable television connections or video connections used in fiber to the home (FTTH - read more) can use amplifiers (read more) that increase power to really high levels, potentially dangerous to the eyes. DWDM telecommunications connections are used in very long-distance connections (read more). Not only do they use fiber amplifiers to increase power, but they also have many different signals operating at different wavelengths on the same single-mode fiber. Any wavelength would not be a problem, but the sum of 16, 32 or 64 individual wavelengths can be very powerful.
The next problem is to focus on the light of fiber in your eye. The light within an optical fiber propagates in a cone shape, whose angle is defined by the characteristics of the fiber transmission determined by the numerical aperture. As your eye moves away from the end of the fiber, the amount of radiation it receives is inversely proportional to the square of the distance; that is, at twice the distance, the power is reduced by 1/4, ten times the distance reduces the power to 1%. It should not be so far to reduce power levels to low levels not harmful.
Also Read: fiber optic jobs salary
As the beam of light that comes out of the optical fiber does it conically, the eye cannot focus it on the retina. This does not happen with the typical laboratory laser or laser pointer, which emits a narrow and directed beam of light, which does not spread; a beam that can easily focus on the retina and cause temporary blindness.
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