Since Kao proposed that optical fibers could be used for communications transmission, optical communication technology has flourished alongside optical fibers, transforming the world. Optical fiber can be considered the cornerstone of optical communication technology, and almost all optical transmission technologies now require optical fiber as the transmission medium.
Currently, many different types of optical fibers have been developed in the industry for different use scenarios, but they all have different shortcomings, resulting in poor universality.
The optical fibers currently used for WDM system transmission are mainly single-mode fibers such as G.652, G.655, G.653 and G.654.
● G.652 fiber is restricted in the direction of coherent transmission due to its transmission loss and nonlinear characteristics;
● G.655 fiber has a strong nonlinear effect due to the small fiber dispersion and small effective cross-sectional area, and the transmission distance is only 60% of that of G.652;
● G.653 fiber has severe nonlinear interference between DWDM system channels due to four-wave mixing, and the fiber input power is low, which does not favor multi-channel WDM transmission above 2.5G;
● G.654 fiber will have a major impact on system transmission due to multi-optical interference from high-order modes and, at the same time, will not be able to meet the requirements of future transmission expansion to the S, E, and O bands.
The poor performance of conventional optical fibers in the current market is also forcing the industry to make advances in next-generation optical fiber technology as soon as possible. LEE, the chief technical planner for the optical product line at Shenzhen Aixton Cable Co., Ltd., considers the vision of next-generation conventional optical fiber as one of the nine major challenges facing key optical communication technologies in the next decade. He believes that to meet the requirements of constant distance and doubling capacity, and to comply with Moore's Law of Light in the development of the wavelength division industry, the next generation of optical fibers must have the following characteristics: First, high performance, low intrinsic loss, and resistance to nonlinear effects; second, high capacity, covering the full or wider available spectrum; and third, low cost and designability, including ease of manufacturing, with a cost comparable to or close to that of G.652 fiber, ease of deployment, and ease of maintenance.
Post time: Aug-12-2022
