Single mode, multimode fiber

As a common medium, optical fiber has the characteristics of good anti-interference, long transmission distance and high transmission rate.

What is the core raw material of optical fiber?

Optical fiber preform is the core raw material for manufacturing quartz series optical fibers. Simply put, a special prefabricated rod of glass used to draw optical fibers (filaments). Optical fiber preform (English name: Optical Fiber Preform or Fiber Preform) is a silica glass rod with a specific refractive index profile and used to manufacture optical fibers (referred to as optical fibers) [1]. The preform generally has a diameter of a few millimeters to tens of millimeters (commonly known as a light rod). The internal structure of the optical fiber is formed in the preform rod.

Fiber-to-the-home also involves multiple industries and categories, such as indoor optical fiber, engineering and applications, which are of strategic significance to the entire telecommunications industry and even the information industry.

What is Single Mode Fiber?

Single-mode fiber: There is only one transmission mode, and light travels in a straight line in a single-mode fiber without reflection. The single-mode fiber core diameter is 8um-10um, and the cladding diameter is 125um.

What is Multimode Fiber?

Multimode optical fiber: It can carry multiple optical fiber signals and transmit multiple modes of light. The diameter of the multimode fiber is 5um-62.5um, and the cladding diameter is 125um.

What is the difference between multimode fiber and multimode fiber?

The difference of light source: single-mode fiber uses laser as light source, which can be precisely controlled; multi-mode fiber uses LED as light source, and the light generated is relatively scattered.

The difference in bandwidth: Single-mode fiber uses a laser to generate light of a single wavelength, which has a higher transmission bandwidth than multimode fiber using LED light sources.

Sheath color: single-mode optical fibers use yellow protective sheaths, and multimode optical fibers mostly use orange or water-green protective sheaths.

Application scenarios of single-mode fiber and multi-mode light

Single-mode fiber is usually used for long-distance transmission, the transmission distance is greater than 5 kilometers, and the 1000BASE-ZX standard fiber can transmit 70 kilometers.

Multimode optical fiber: used for short-distance optical fiber transmission, such as in the same building or in the park, and the transmission distance is within 2 kilometers.