Fibers are bundled together and mounted at the output of the illuminator, which may be located away from the target illumination point of the light. This is useful in cases where an object should be illuminated, but not heated by the light source.

Despite the mystery surrounding it, there’s one thing we know for certain. Seeing this beam of light shooting down from the sky is easily one of the most breathtaking events we’ve witnessed so far this year.

Residents and visitors to the Zigana Pass in Turkey’s Pontic Mountains were treated to quite a treat earlier this month. According to a video shared on YouTube, a bright beam of light shone down on the pass.

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Instead of being a tractor beam from a UFO, some say the beam is most likely a crepuscular ray. Crepuscular rays are essentially shafts of light that become more visible due to dust and particles in the air. It’s possible that the beam of light witnessed at Zigana Pass was just that, a shaft of light made brighter because of the snowy particles filling the air. Britannica says crepuscular rays appear to radiate due to the perspective that is created when the sun passes through clouds in a certain way.

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In contrast, lighting applications use HID, halogen, LED, and other light sources, and one source can feed many fiber light pipes. Different endpoint are available, including simply using bare fiber. The ultimate receiver of this light is the eye. Attenuation and light loss are the limiting factors for run length, which is dozens of meters at best. For this reason, splicing techniques usable for data transmission are out of the question; illumniator placement must be carefully planned instead.

Despite what scientists say, there are a lot of folks who just don’t believe that the beam of light could be a crepuscular ray. Instead, some say it was light reflecting off of the ice crystals in the past. That caused it to shoot into the sky. This is also probable, as the beam never seems to waver, despite the clouds moving around it. Others believe the light is still some form of extraterrestrial event.

Fiber optic lights function no differently than fiber optic cables designed for communication, but the fibers used for lighting are often manufactured specifically for lighting applications, with larger cores and thinner claddings. The fibers themselves may be plastic or glass, though the intensity of the light source (illuminator) will have to be taken into consideration in the case of plastic, as it has a lower temperature tolerance than glass.

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In lighting applications, large-diameter, solid core fiber is typically used. As with smaller fiber used for data transmission, the most crucial factor of its optical performance is the end finish; the ends must be finished with the proper tool for the lowest attenuation. Large-diamter fiber like this is often manufactured without a protective jacket, so care must be taken to protect its caldding from scratches during installation. The fiber’s ultraviolet sensitivity should also be taken into consideration, as excessive exposure to it can cause the fiber to degrade over time.

While we can’t say for sure what the beam of light was, we do know a few things about it. First, it was bright and all the footage and photos we have of it were taken from far away. Secondly, it remained in place for over three hours. Scientists’ claim that it could just be a crepuscular ray isn’t completely unlikely. However, this is just one of the few times that we’ve seen such rays stick around for so long. Additionally, crepuscular rays are most often only seen around sunrise or sunset.

In data transmission applications for fiber optics, one device is connected by to another, each one acting as a transmitter or receiver. Typically the light source, or transmitter, is an LED or laser, and the sink, or receiver, is a photodiode. The link length is limited to hundreds of kilometers in ideal conditions, primarily by dispersion.

(2014) The FOA Reference For Fiber Optics – Fiber Optic Lighting [Online]. Available: http://www.thefoa.org/tech/lighting/lighting.html

Fibers designed for light are available in two varieties: End-emitting, where light is directed through the fiber to the end, acting as a spotlight, and side-emitting, where light is scattered along the length of the fiber to create a “neon light” effect.

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The beam looks almost like that of a UFO shining down on an unsuspecting victim, like what you’d see in a Hollywood movie. However, the real explanation behind the beam isn’t quite as sinister as you might think.

The video was uploaded on January 18 and shows a bright beam of light shining down in the distance. Many residents and visitors to the Zigana Pass witnessed the event, and while it might seem extraterrestrial, scientists have a different explanation for it.