Fiber Cable Manufacturer
2,4,6,8,12,24 cores GYFXY 2FRP Optical Fiber Cable
2 x 1.0mm
6.5mm,7mm,8mm or others
aerial or duct fiber optical cable networking system
3/4/5km km each exporting wooden drums
Learn more about fibre optica cable:
Singlemode fiber has a much smaller core, only about 9 microns, so that the light travels in only one ray (mode.) It is used for telephony and CATV with laser sources at 1310 and 1550 nm because it has lower loss and virtually infinite bandwidth.
1300 or 1310nm?
Fiber is filled with jargon that is traditional and often obtuse in meaning. The 1300/1310 issue goes back to the beginning. AT&T's long-wavelength lasers were statistically centered around 1310nm (but varied from 1290-1330 or more) so they adopted the 1310nm nomenclature. LEDs with a wider and more varied spectral output (~1260-1350nm with spectral widths of 60-150nm depending on the construction) became known as 1300nm devices.
When NBS (now NIST) created a calibration standard for power meters, they used 850, 1300 and 1550nm so meter calibration is usually at those wavelengths, although some manufacturers offer both 1300 and 1310 or call it 1300/1310 because it is an irrelevant difference in calibration.
Plastic Optical Fiber (POF) is large core ( about 1mm) fiber, usually step index, that is used for short, low speed networks.
PCS/HCS (plastic or hard clad silica, plastic cladding on a glass core) has a smaller glass core (around 200 microns) and a thin plastic cladding.
Fiber types. The left of the drawing shows the core/cladding diameters. The right part of the drawing shows the index profile of the fiber. The index profile shows the relative index of refraction of the material used in making the fiber.
Total Internal Reflection
The index of refraction of glass or any optical material is a measure of the speed of light in the material and changes in index of refraction are what causes light to bend - as shown in this photo of a plastic rod in a pond: