Optical fiber has good performance properties and is designed for high-speed digital data transmission. Currently, in industry and manufacturing, various types and standards of fiber optic cables are used for organizing communications. Each type of cable has its own area of application. The development of these technologies is reflected in the development of data transmission systems. So, today in this article we are going to discuss single-mode fiber and its G.652 and G.655 standards. See this below…
What Is Single-Mode Fiber?
In a single-mode fiber cable, the core diameter does not exceed 10 microns. Here, the probability of
dispersion is much less, and this makes it possible to transmit a signal at a speed of 10 Gb/s over very long distances. However, a single-mode cable and switching equipment for its arrangement are more expensive and require particularly high-quality welding.
The ITU-T G.65x series is a well-known category of single-mode fiber standards that can be further subdivided into G.652, G.653, G.654, G.655, G.656, and G.657, including G.652 and G.655 are two commonly used options. G.652 vs G.655 fiber, what are the differences, and how to make a wise decision.
What is G.652 Single Mode Fiber?
The single-mode type optical fiber is known by the G.652 standard. The latter was developed for the 1.31 µm wavelength range. With this indicator, G.652 fiber has zero chromatic dispersion and attenuation with a minimum value. In G.652 fiber, the diameter of the core itself is about 9 µm, and the diameter of the cladding is 125 ± 2 µm.
G.652 optical fiber is highly reliable and provides data transfer rates up to 10 Gbps. Often such communication lines are used for single-wave and multi-wave transmission when the distance between two points is on average 50 kilometers.
The use of G.652 fiber in communication lines, where data transmission at a speed higher than 10 Gb / s is required, requires more sophisticated equipment, and, consequently, higher financial costs.
What is G.655 Single Mode Fiber?
This fiber is intended for use in backbone fiber-optic lines and global communication networks using DWDM technologies in the wavelength range of 1.55 microns. Fiber – G.655 has a weak, controlled dispersion in the C band (l = 1.53-1.56 microns) and a large diameter of the light-guiding core in comparison with the G.653 type fiber. This reduces the problem of four-wave mixing and non-linear effects and opens up the possibility of using efficient fiber-optic amplifiers.
The above classification of optical fibers according to their main characteristics is given from the point of view of the user. However, it should be borne in mind that manufacturers and suppliers may have their own classification and labeling associated with the peculiarities of production.
Nevertheless, these materials will help you to orient yourself correctly when choosing a fiber optic cable for the construction of new and expansion of existing fiber-optic communication lines.
G.652 vs G.655 Single Mode Fiber: What Is the Difference?
The above classification of optical fibers according to their main characteristics is given from the point of view of the user. However, it should be borne in mind that manufacturers and suppliers may have their own classification and labeling associated with the peculiarities of production.
Nevertheless, these materials will help consumers to correctly navigate when choosing a fiber optic cable for the construction of new and expansion of existing fiber-optic communication lines. So, here let’s know about the difference between G.652 and G.655 standard.
The G.652 Fiber:
defines 4 versions (A, B, C, D). The G.652.C and G652.D variants have Zero Water Peak (ZWP) for use in the 1310 nm to 1550 nm wavelength range, supporting Coarse Wavelength Division Multiplexing (CWDM) transmission …
G.652.D is a standard single mode fiber (SSMF) designed for 10 and 40 Gbit / s systems (thanks to reduced polarization mode dispersion – PMD). It is currently the most popular fiber optic.
The main release of G.652 fiber was normalized in 1984 and the standard currently has four subcategories: G.652.A, G.652.B, G.652.C, and G.652.D. Every one of the four variations have a similar G.652 center size of 8-10 micrometers. Among them, G.652.C and G.652.D filaments have better execution than G.652.A and G.652.B.
For the G.652 detachments, G.652.A and G.652.B filaments are intended to have a zero-scattering frequency of around 1310 nm – ideal for activity in the 1310 nm range. Because of the idea of the water top, both are inadmissible for frequency division multiplexing (WDM) applications.
Progressed G.652.C and G.652.D filaments have disposed of the water top for full range activity, permitting them to be utilized in the 1310 nm to 1625 nm frequency reach to help coarse frequency division multiplexing (CWDM). Here is a table of details for the four variations of G.652.
The G.655 Fiber:
defines fiber with specifications specified at 1550 nm and 1625 nm, with non-zero
chromatic dispersion slope in these wavelength ranges. This type of optical fiber can support long-haul systems using dense wavelength division multiplexing (DWDM) transmission in the 1530 to 1625 nm wavelength range.
The G.655 standard can be separated into five variations G.655.A, G.655.B, G.655.C, G.655.D, and G.655.E, including G.655 C/D/E – regularly utilized. G.655 single-mode fiber is known as non-zero scattered relocation fiber (NZDSF) in view of scattering at 1550 nm, which is near zero yet not yet zero. There are two kinds of NZDSF, (- D) NZDSF and (+ D) NZDSF, which mean negative and positive slant versus frequency, individually.
G.655 fiber has a little, controlled measure of chromatic scattering in the C-band (1530-1565 nm), where enhancers work best, and has a bigger center region than G.652 fiber. As a further developed scattering moved fiber, G.655 can stifle four-wave blending and other non-direct impacts. Subsequently, G.655 single-mode fiber upholds longer distances with higher data transfer capacity, which can meet the prerequisites of thick frequency division multiplexing (DWDM) transmission.
Conclusion
We hope that we were able to tell you in some detail about the concepts of single-mode cables, about their properties and differences. We also hope that this article will help you better understand what to look for when working with fiber optic cables. The various single-mode optical fibers defined by ITU-T include G.652, G.653, G.654, G.655, G.656, and G.657.
Each type of single-mode fiber has a different field of application, and the evolution of these optical fiber specifications reflects the evolution of transmission system technology from the earliest single-mode optical fiber installation to the present day. Choosing the right one for your project can be vital in terms of performance, cost, reliability, and safety. QSFPTEK’s optic fiber cables are built to high standards of quality and are fully tested, welcome to consult via sales@qsfptek.com.
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