A New Type Of Optical Fiber With Microstructure Cladding Of Dual-core Optical Cable
Dual-core photonic crystal fiber
The photonic crystal fiber is composed of a single medium (usually quartz glass), which exhibits a periodic close arrangement (such as periodic hexagons, etc.) in the two-dimensional direction, while the wavelength level of the air remains basically unchanged in the fiber axis. A new type of optical fiber with a microstructure cladding composed of holes.
Dual-core photonic crystal fiber is also one of the research hotspots of photonic crystal fiber, which is mainly reflected in its coupling characteristics and its application in dispersion and dispersion slope compensation. Generally, the dual core of the optical fiber of the dual-core photonic crystal fiber is formed by removing the air pillars on both sides of the center hole, which is a non-coaxial dual-core fiber. The ring twin-core photonic crystal fiber is used to make a new type of mode interferometer, and it is also one of the research hotspots, which is a kind of coaxial twin-core fiber. [2]
Ribbon duplex fiber
The ribbon dual-core fiber is a new type of special fiber. The two cores of the ribbon dual-core fiber are distributed inside, and the cladding is thinner, and the overall fiber cross-section is approximately rectangular. The ribbon dual-core optical fiber can be directly used as a dual-core optical fiber to make a variety of optical fiber sensors and optical fiber devices. A ribbon double-core fiber made of high molecular polymer with doped gain material and cladding in the core can be similar to a double-clad fiber. [2]
Twin core fiber
The twin-core fiber consists of two adjacent branch waveguides bonded together through a common thin edge; the shape and size of each branch waveguide is the same as that of a standard single-mode fiber. The twin core fiber can achieve low insertion loss for the input and output of the independent pigtails of each branch waveguide, and can be made into an interferometer with stable thermal balance and mechanical coupling through the method of fusion and tapering.
