Yingda can provide all types of fiber optic connectors for telecommunications, no matter spare parts, half assembled or finished products for different applications or clients. All items meet IEC, TIA, ROHS, and CE certified.
Features
- High repeatability and high return loss
- High stability and good interchangeability
- Low insertion loss, high reliability
- Three types of fiber end face forms: PC, UPC, APC
- Fiber optic full range available: multimode (50/125, 62.5/125, OM3, OM4), single-mode (G.652, G.655, G.657, etc.);
Application
- FTTX
- Fiber optic data transmission
- Local network, wide area network, cable TV
- Fiber optic data transmission testing equipment and active device terminals
Technical Specification
| Item | Single mode | Multi-mode | |
| APC | UPC | PC | |
| Insertion loss (dB) | ≤0.3 | ≤0.3 | ≤0.3 |
| Return loss (dB) | ≥65 | ≥50 | ≥35 |
| Repeat ability | Additional loss≤0.1dB, return loss changeability≤5dB | ||
| Working temperature(℃) | -40 ～ +75 | ||
| Storage temperature(℃) | -40 ～ +85 | ||
Fiber Optic Connector Types
Below will introduce four types of mostly used fiber optic connectors SC LC FC ST, for other, please contact our sales team for more information.
LC Connector
The LC fiber optic patch cord use a miniaturized (SFF) connector, which is an ideal choice for high-density application. The plug of this LC fiber optic connector is made of zirconia ceramic material with a diameter of only 1.25 mm. The end face of the lc fiber connector is available in two types: PC and APC. Due to its high-precision installation, it has the lowest insertion loss and return loss.
LC Connector Dimension
LC LC Patch Cords
SC Connectors
SC fiber optic jumper is one of the early and widely used fiber patch cords. It is not only convenient to use but also low-cost, making it one of the cheapest patch cords. The plastic shell of SC connector is rectangular. The size and structure of the ceramic ferrules used in the zirconia coupling sleeve are exactly the same as those of the FC connector, and the end faces of the ferrule are APC or UPC; SC fiber optic connector is easy to plug and unplug, and the fastening method is to use a plug and unplug key type, which does not require rotation. It has high compressive strength, high installation density, and small insertion loss fluctuations. SC fiber connector can be connected in a duplex form. Widely used in fiber optic communication networks.
LC Fiber Connectors Dimension
LC Patch Cords Types
FC Patch Cords
FC patch cord is one of the early and widely used fiber jumper. FC FC patch cordis not only convenient to use but also cost-effective, and is one of the commonly used fiber optic patch cables. The end faces of the ferrule are mostly APC and UPC; The fastening method is to use a metal circular thread rotating locking structure. FC connector is easy to plug and unplug, with high installation density, but cannot be connected in a dual form. It has low insertion loss fluctuations and high compressive strength, and is widely used in optical communication networks.
FC Connector Dimension
FC Patch Cord Types
ST Patch Cord
The ST fiber patch cord is suitable for both single mode and multi-mode fibers. ST connector adopts a metal circular bayonet rotating locking structure, with a long floating spring sleeve built-in to fix the fiber. It also uses high-precision ceramic ferrule, with excellent return loss insertion performance and convenient and fast use. This ST patch cord is one of the older generation fiber optic cords, but it has been widely used in multimode networks, including building and campus LANs.
ST Patch Cord Types
Fiber Optic Connector Endface Standards
Yingda all fiber optic connectors are made and produced according to international standards, and all 100% qualified test before delivery.
For the ferrule end face of multimode fiber, we strictly grinding according to below standards:
| Defect category | Zone A | Zone B | Zone C |
| scratch | Not allowed | Not allowed | Allow 2 strips with a width≤1um (length ≤125um) |
| speckle | Not allowed | Not allowed | Allow 2pcs with a width≤1um (<3μm) |
| Adhesive layer, pore size | Allow adhesive layer and aperture width between area B and area C to be ≤5μm; The adhesive layer and aperture length are less than 50% of the circumference of the fiber end face | ||
For single mode fibers end face, we strictly grinding according to below standards:
| Defect category | Fiber core（Zone A） | Zone B | Zone C |
| scratch | Not allowed | Not allowed | Allow 1 strip with a width≤1um (length ≤125um) |
| speckle | Not allowed | Not allowed | Allow 1pc with a width≤1um (<1/4 of the fiber core) |
| Adhesive layer | Allow adhesive layer and aperture width between area B and area C to be ≤1 um; The adhesive layer and aperture length are less than 30% of the circumference of the fiber end face. | ||
Connector 3D Geometric Shape Standards
| Model | Bend radius (mm) | Apex offset (μm) | Fiber height (nm) | Angel |
| LC/UPC | 7 ～ 25 | 0 ～ 50 | -100 ～ +50 | NA |
| LC/APC | 5 ～ 12 | 0 ～ 50 | -100 ～ +50 | 7.5°～ 8.5° |
| 2.5/UPC | 10 ～ 25 | 0 ～ 50 | -100 ～ +50 | NA |
| 2.5/APC | 5 ～ 12 | 0 ～ 50 | -100 ～ +50 | 7.5°～ 8.5° |
| Remark | Qualification rate of 3D geometric shapes ≥90%. | |||
FAQ
What are four types of fiber optic connectors?
SC LC FC ST are the four types of fiber optic connectors that are widely used, except these there are MU, MTRJ, MPO, MTP, E2000, LX.5, DIN, D4, FDDI, SMA905 connectors as well.
What is optical fiber connector?
Optical fiber connector is a physical interface used to connect fiber optic cables. It has many different appearance for different application, like FC SC LC ST etc. FC stands for Ferrule Connector, which is reinforced externally with a metal sleeve and fastened using a screw buckle. The ST interface is typically used for 10Base-F, while the SC interface is typically used for 100Base-FX.
What are SC and LC connectors?
SC and LC connector are both fiber optic connectors with plastic housing and ceramic ferrule, which are widely used in ftth network, while LC is more popular in high density network. SC connector size is double of LC connector, the ferrule is 2.5mm double than 1.25mm of LC connectors, but LC duplex is the same size of SC, so where is SC port can use LC duplex interface as well.
What is FC PC connector?
FC stands for Ferrule connector, and PC short for physical contact, which is polishing method of the ferrule end face. We can describe it FC PC or FC/PC, FC-PC as well. When docking, both ends of the adapter must have the same FC/PC connector, not FC/APC and FC/PC nor FC/PC and SC/PC, as this will result in docking failure and transmission interruption.
How to choose a fiber connector?
When choosing a fiber connector, we must consider what upstream and downstream products it will interface with, as well as its application scenarios. Such as FTTH networks, at present, most of the fiber optic device and distribution box or ftth enclosures are only with SC ports, that means we can only use SC connectors or LC duplex connectors as well, if customer only have FC or ST connectors, it can not be used. Only if you can change the FC ST round shape port to the same as SC square ports. But in the data center, all the equipment or OLT side are LC interface, so we must configure lc connectors.
What is the most commonly used fiber connectors?
SC LC FC ST are mostly used fiber connectors, with the development of high density solutions like data center, MPO MTP connectors are also quite popular now.
What are the standard fiber connectors?
Yingda fiber connectors strictly comply with international standards IEC and TIA, and meet customer requirements for insertion loss, return loss, durability, and repeat ability. Please refer to the technical specification above for details. All products are shipped after 100% testing and qualification. If any quality issues are found, all products will be returned or exchanged.
How to connect fiber optic cable to connector?
If need a fiber optic connectors, that means it is end termination, so there are mainly 3 ways to cable termination:
The first method is to connect fiber optic cable with connectors in the factory and prefabricate it into fiber optic jumpers, which requires details such as cable length, fiber type, connector type, cable type, etc. But on-site construction docking can be simple use, no need special tools, fast and convenient. Most of cable can be used, not limited.
The second method is to add fiber optic cable with fiber optic fast connectors on site, which is flexible to operate and can freely cut the length of the optical cable, and the most popular cable are drop cable 2x3mm, 2×1.6mm or 2mm 3mm, other type of cable can not be used due to the fast connectors now on market only such diameters available.
The third method is hot melt by fusion splicer. Currently, China Telecom basically operates in this way. The worker will cut off the fiber patch cord into 2pcs fiber optic pigtails on site, use fusion splicer to fuse the optical fiber pigtail together with the reserved optical fiber. Then there is a fiber optic interface to connect with the router or optical network unit for ftth use. This way will need equipment like fusion splicer, cable stripper, fiber clever, alcohol, dust-free papers, etc. It takes long time on site, and need protect the fiber joint with heat shrink sleeve or enclosures as well.
Please choose a solution that is suitable for your project.
Can we use our own brand fiber optic connector?
yes, welcome print customer logo, brand or other information on connectors for better brand promotion, and package or shipping mark can be specify too.
