A multi-mode optical fiber B single-mode optical fiber
In the sixth part
Problem 2: Fiber optic cable commonly used models and specifications GYTA single-mode fiber optic cable
GYTA cables are constructed with a 250 μm optical fiber sleeved in a loose tube made of high modulus material and filled with a waterproof compound. At the center of the core is a metal reinforcement core, which for some cores is extruded with a layer of polyethylene (PE). The loose tube (and filler cord) is twisted around the center reinforcement to form a compact and round core, with gaps in the core filled with water-resistant filler. Aluminum plastic coated tape (APL) longitudinal package after extrusion of polyethylene sheath cable.
8, 12 on behalf of the 8-core and 12-core
B1 on behalf of the G.652 category is a conventional single-mode fiber.
Communication fiber is specifically divided into G.651, G.652, G.653, G.654, G.655 and G.656 six categories and a number of subclasses
(1) G.651 category is a multimode optical fiber, the IEC and GB/T and further according to the core diameter, cladding diameter, the numerical aperture of the parameter sub-division of the core diameter, cladding diameter, numerical aperture of the parameters of A1a, A1b, A1c and A1d. A1d four subcategories.
(2) G.652 category is a conventional single-mode fiber, currently divided into G.652A, G.652B, G.652C and G.652D four subclasses, the IEC and GB/T G.652C named B1.3, the rest of them are named B1.1
(3) G.653 fiber is a dispersion-shifted single-mode optical fiber, the IEC and GB/T G.653 fiber is dispersion-shifted single-mode fiber, IEC and GB/T classify G.653 fiber as B2 type fiber.
(4) G.654 fiber is a cut-off wavelength shifted single mode fiber, also known as the 1550nm performance of the best optical fiber, IEC and GB/T G.654 fiber classification named B1.2 type optical fiber.
(5) G.655 type fiber is non-zero *** dispersion-shifted single-mode fiber, currently divided into G.655A, G.655B and G.655C three subclasses, the IEC and GB/T G.655 fiber classification named B4 type fiber.
Question 3: What is the difference between single-mode and multimode fiber optic cables? The main physical difference between single-mode and multimode fiber optic cables is the core size. Multimode fiber optic cables come in two core sizes (50.0 μm and 62.5 μm) and single-mode fiber optic cables are rated at 9.0 μm. Multimode fiber optic cables allow optical signals to be transmitted in a variety of paths (or modes), whereas single-mode fiber optic cables, as the name suggests, allow light to be transmitted in a single path for both the high and the low sub-modes.
Question 4: Is there a difference in the appearance of single-mode fiber and multimode fiber? Yes
Outdoor fiber optic cables can be distinguished from the logo as follows:
GYXTW-4B1
GYXTW is the cable model, meaning that the standard center-beam fiber optic cables
4 means that the cable is a 4-core cable
B1 means that the cable uses a single-mode G.6G.6B1, a single-mode G.6G.6B1, a single-mode G.6G.6B1 and a single-mode G.6B1. single-mode G.652B fiber
GYTS-8B4
GYTS is a fiber optic cable model, meaning the standard loose tube laminated fiber optic cable
8 means that this cable is 8 cores
B4 means that this cable is single-mode G.655 fiber
GYFTY-16A1b
GYFTY is an optical cable model, meaning that the standard non GYFTY is the model of fiber optic cable, which means standard non-metallic loose sleeve stranded fiber optic cable
16 represents that this cable is 16 cores
A1b represents that this cable adopts multi-mode 62.5/125 optical fiber
GYFTZY-24A1a
GYFTZY is the model of fiber optic cable, which means standard non-metallic loose sleeve stranded flame retardant optical cable
24 represents that this cable adopts single-mode G.655 optical fiber
Is this OK?
Question 5: Is this fiber optic cable single mode or multimode, urgent! Outdoor cables can be distinguished from the logo as follows:
GYXTW-4B1
GYXTW is the cable model, meaning the standard center-beam fiber optic cable
4 represents that this cable is a 4-core
B1 represents that this cable uses a single-mode G.652B optical fiber
GYTS-8B4
GYTS is the model of fiber optic cable, which means standard loose casing stranded fiber optic cable
8 means that this cable is 8 cores
B4 means that this cable adopts single-mode G.655 optical fiber
GYFTY-16A1b
GYFTY is the model of fiber optic cable, which means standard non-metallic loose casing stranded fiber optic cable
16 means that this A1b stands for multimode 62.5/125 fiber
GYFTZY-24A1a
GYFTZY is a fiber optic cable model, which means standard non-metallic loose tube laminated flame retardant fiber optic cable
24 stands for 24 cores of fiber optic cable
A1a stands for multimode 50/125 fiber
GYFTZY-24A1a stands for Multimode 50/125 fiber
Indoor cable in addition to the above method to distinguish, but also according to the color to distinguish
Indoor single-mode fiber optic cable is yellow
Indoor multi-mode fiber optic cable is orange
Fiber optic cables, MPO, fiber optic patch cords, fiber optic adapters, fiber optic distribution boxes and other related preferably up to the standards of high-quality, so that we can protect the network transmission. network transmission. Our project with Finet.
Question 6: What is the difference between GYTS fiber optic cable and GYTA fiber optic cable? GYTS fiber optic cable is an aerial or directly buried with the sea of light, GYTA fiber optic cable is an aerial or through the pipe with the fiber optic cable. One can be directly buried in the ground, the other is to wear a pipe, the theory is not directly buried. This is the difference.
Question 7: Fiber optic cable model Who knows what fiber optic cable GYTA 4A1B 62.5/125 means? Although the answer to this question is not necessarily adopted, but I still can not help it!!!!
GY stands for outdoor, T stands for grease-filled, A stands for Aluminum-Polyethylene bonded sheath, 4 stands for 4 optical fibers, A1B stands for multimode A1B fiber, 62.5 stands for core diameter, 125 stands for the diameter of the optical fiber wrapped into.
In the multimode fiber in the main A1a, A1b two kinds of, which A1a core diameter of 50um, A1b core diameter of 62.5um, can not be mixed!
The full name of this model is metal reinforced members, loose layer stranded grease-filled, aluminum-polyethylene bonded sheath (aluminum tape flat package after the outer protection of the polyethylene sheath layer), contains four A1a multimode fiber optic cable for communications outdoor.
Question 8: the types and models of optical fiber I just know that there are single-mode and multimode, single-mode is the wavelength in the 1310NM, multimode is the 850NM, there is also a different interface, divided into LC, SC, FC, because of my limited professional knowledge, and the other is that I looked up on the Internet! Please refer to! First, the classification of optical fiber Optical fiber is an optical fiber (OF: Optical Fiber) for short. But the optical communication system is often Opti cal Fibe (fiber) and simplified to Fiber, for example: Fiber Amplifier (Fiber Amplifier) or Optical Fiber Backbone (Fiber Backbone) and so on. Some people ignore the fact that although Fiber has the meaning of fiber, but in the optical system refers to the optical fiber. Therefore, some optical product description, the fiber directly translated into "fiber", obviously is not desirable. Optical fiber actually refers to the core made of transparent material and the cladding made of slightly lower refractive index than the core around it is covered, and will be injected into the core of the optical signal, through the cladding interface reflection, so that the optical signal is propagated in the core of the media forward. There are many types of optical fibers, and the functions and properties required vary depending on the application. But for cable television and communications with optical fiber, its design and manufacturing principles are basically the same, such as: ① small loss; ② a certain bandwidth and small dispersion; ③ easy to connect; ④ easy to become a system; ⑤ high reliability; ⑥ manufacturing is relatively simple; ⑦ inexpensive and so on. Classification of optical fiber is mainly from the working wavelength, refractive index distribution, transmission mode, raw materials and manufacturing methods for a summary of the various classifications are listed below. (1) operating wavelength: ultraviolet fiber, visible fiber, near-infrared fiber, infrared fiber (0.85pm, 1.3pm, 1.55pm). (2) Refractive index distribution: step (SI) type, near-step type, gradient (GI) type, others (such as triangular, W-type, concave, etc.). (3) Transmission modes: single-mode fiber (including polarization-holding fiber, non-polarization-holding fiber), multi-mode fiber. (4) Raw materials: quartz glass, multi-component glass, plastics, composite materials (such as plastic cladding, liquid core, etc.), infrared materials. According to the cladding material can also be divided into inorganic materials (carbon, etc.), metal materials (copper, nickel, etc.) and plastics. (5) Manufacturing methods: Pre-plasticization with vapor-phase axial deposition (VAD), chemical vapor deposition (CVD), etc., drawing method has a tube law (Rod intube) and double crucible method. Second, quartz optical fiber is silicon dioxide (SiO2) as the main raw material, and according to different doping, to control the core and cladding of the refractive index distribution of the optical fiber. Quartz (glass) series of optical fiber, with low consumption, broadband characteristics, is now widely used in cable television and communication systems. Fluorine Doped Fiber is one of the typical products of quartz fiber. Usually, as 1.3Pm wavelength communication optical fiber, the control core dopant for dioxide (GeO2), cladding is made of SiO fried. However, the core of the fluorine-connected fiber, most of the use of SiO2, but in the cladding is doped with fluorine. Rayleigh scattering loss is a light scattering phenomenon caused by changes in the refractive index. Therefore, it is desirable to minimize the number of dopants that contribute to the change in refractive index. Fluorine is mainly used to reduce the refractive index of SIO2. Therefore, it is often used for doping of the cladding. In fluorine doped fibers, the core does not contain fluorine dopants that affect the refractive index. Because of its Rayleigh scattering is very small, and the loss is close to the theoretical minimum. Therefore, it is mostly used for long-distance optical signal transmission. Quartz fiber (Silica Fiber) and other raw materials compared to the optical fiber, but also from the ultraviolet light to the near-red light transmission spectrum, in addition to communications purposes, can also be used for light conduction and conduction of images and other fields. Infrared Fiber The quartz optical fiber developed in the field of optical communication has an operating wavelength of only 2 pm for short transmission distances, and the optical fiber developed to work in the field of longer infrared wavelengths is called infrared fiber. Infrared Optical Fiber is mainly used for optical energy transmission. For example: temperature measurement, thermal image transmission, laser scalpel medical treatment, thermal processing, etc., the popularity rate is still low. Four, the duplication of Taiwan optical ...... >>
Question 9: How many types of fiber optic cables are there? Fiber optic cable class there are eight companies' products to obtain "China Famous Brand", respectively, Changfei Optical Fiber and Cable Company Limited, Hengtong Group Company Limited, Tongguang Group Company Limited, Fiberhome Communication Technology Company Limited, Zhongtian Science and Technology Group Company Limited, Yongding Group Company Limited, Futong Group Company Limited, Tongding Group Company Limited.
Network engineering, monitoring engineering commonly used cable models are: GYXTW center bundle tube (2-12 cores), GYSTS, GYSTS stranded fiber optic cable (2-144 cores), GYTY53 double stranded fiber optic cable, GYFTY non-metallic fiber optic cable, GJFJV indoor fiber optic cables, GYXTZW, GYSTZS fire-retardant fiber optic cables; accessories: fiber optic patch cords, pigtails (FC, SC, ST, LC, MTRJ), coupler, terminal box, fiber optic transceiver (10/100/1000M adaptive, pure Gigabit).
Fiber optic cable model preparation method
Type
Type consists of five parts, each part is represented by a code, as shown in the figure below. Which refers to the structure of the core structure and fiber optic cable derived from the structural characteristics.
Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ
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I. Classification of the code
GY -- communication outdoor (wild) fiber optic cable
Second, the code of the reinforcing components
Reinforcing components refer to the expansion of the sheath or embedded in the components used to enhance the tensile strength of the fiber optic cable. If there are both metal and non-metallic reinforcing components, only expressed as a structural feature of the metal components.
(no symbol) - metal reinforcing members
F - non-metallic reinforcing members
Third, the optical fiber cable core and cable derived structural features of the code
The structural features of the optical fiber cable should indicate the core of the main types and cable derived structural features
The structural features of the optical fiber cable should indicate the core of the main types and the cable derived structural features of the main types and cable derived structural features. The main type of fiber optic cable and the derived structure. When the cable type has several structural features need to be specified, can be expressed in a combination of code, the combination of code according to the following corresponding code in order from top to bottom.
D - fiber optic tape structure
S - fiber optic loose jacketed structure
J - fiber optic tight jacketed structure
(Unsigned) - Stranded structure
X - Cable center tube (clad) structure
T - Filled structure
C --Self-supporting structure
E - oval shape
Z - flame-retardant structure
IV. Sheath designation
Y --V - PVC sheath
V - PVC sheath
A - aluminum - polyethylene bonded sheath (referred to as A)
V - polyethylene sheath
A - aluminum - polyethylene bonded sheath (referred to as A)
S - steel-polyethylene bonded sheath (referred to as S-sheath)
W - steel-polyethylene bonded sheath with steel wire (referred to as W Sheath)
V. Designation of outer sheath
When there is an outer sheath, it can include some parts and all of the cushioning layer, armoring layer and outer cover layer, and its designation is expressed by two groups of numbers (cushioning layer need not be expressed), the first group indicates the armoring layer, which can be a one- or two-digit number, see Table 1; the second group indicates the outer cover layer or jacket, which should be a one-digit number.
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Composition of the specifications of optical fibers
The specifications of optical fibers are composed of the number of fibers and the category of fibers.
Designation of the number of fibers
The actual effective number of fibers of the same category in the fiber optic cable is expressed as a number.
Fiber category code
Fiber category should be used for fiber optic product classification code, i.e., with a capital A for multi-mode fiber, capital B for single-mode fiber and then numbers and lowercase letters to indicate the different types of optical fiber. a date multi-mode fiber, see Table 3.
Table 1 Armor Layer
code
Armor Layer
0 <
No Armor Layer
2
Wrapped Double Steel Tape
3
Single Fine Round Wire
33
Double Fine Round Wire
4
Single Thick Round Wire
44
Double Thick Round Wire
5
Wrinkled Steel Belt
Table 2 Outer Coat or Jacket
Designator
Outer Coat or Jacket
1
Fiber Outer Coat
2
Polyvinyl Chloride Jacket
3
Polyvinyl Chloride Jacket
4
Polyvinyl Chloride Jacket Overlay with Nylon Jacket
5
5 <
Polyethylene jacket
Table 3 Multimode Fiber Optics
Classification Designator
Characteristics
Core Diameter (μm)
Cladding Diameter (μm)
Material
Ala
Asymptotic Index
50
125
< p> Silicon Dioxide
Alb
Asymptotic Refractive Index
62.5
125
Silicon Dioxide
Alc
Asymptotic Refractive Index
85
125
Silicon Dioxide
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Question 10: Is multimode fiber optic cable number 50/125 a 10 Gigabit cable? What about OM3? Single-mode has 10 Gigabit? If so, what is the number? 50/125 refers to the core diameter/cladding diameter, IEC named A1a, which is a multimode category, OM3 refers to the A1a category of optical fibers optimized for the 850nm wavelength to enhance the bandwidth of the product, is a subcategory of A1a, IEC named A1a.2. If the full injection bandwidth is greater than 1500MHz * km, the effective mode bandwidth is greater than 2000MHz * km, can be called OM3 fiber. If the full injection bandwidth is greater than 1500MHz*km, and the effective mode bandwidth is greater than 2000MHz*km, it can be called OM3 fiber. OM3 fiber in 10Gb/s Ethernet (i.e., 10 Gigabit) link length can be up to 300m is called OM3-300. the industry is also commonly known as the OM3-150, which is strictly speaking does not meet the requirements of the OM3, and can only be referred to as OM2+. Therefore, 50/125 fiber can be called 10Gbps, depending on the bandwidth data, to meet the OM3 requirements to be called 10Gbps.
The bandwidth of single-mode fiber can basically be considered unlimited, and there is no such thing as 10Gbps.