G657 A1 200um Fiber
200 μm Single-Mode Fiber for Compact Cable Designs G657 A1 200um Fiber A compact single-mode fiber option for FTTH, micro-cable, Microduct and other high-density optical cable designs where both bend performance and limited internal space matter. View G.657.A1 Fiber Request a Quote Product...
- Product Introduction
G657 A1 200um Fiber
A compact single-mode fiber option for FTTH, micro-cable, Microduct and other high-density optical cable designs where both bend performance and limited internal space matter.
View G.657.A1 Fiber Request a Quote
Product Introduction
China Super Tech Co., Ltd. supplies G657 A1 200um Fiber for compact optical cable structures where installation space is limited but stable single-mode transmission is still required. The fiber uses a 200 μm-class coating structure while keeping a standard 125 μm-class glass cladding, helping reduce the space occupied by each fiber inside the finished cable. Its G.657.A1 design also improves resistance to bend-related optical loss, making it suitable for FTTH, indoor access networks, micro-cables and other high-density applications. The key point is not simply making the fiber smaller, but controlling the coating size, geometry and optical performance so the fiber can work reliably with the customer's downstream cable design.
Product Features
200 μm-Class Coating for Higher Fiber Density
Compared with common 250 μm coating structures, the smaller outer diameter takes up less space inside a loose tube, micro-tube or compact optical cable. This gives cable designers more room to increase fiber count or reduce the finished cable size. The benefit comes from the reduced coating dimension, not from simply changing the product name.
G.657.A1 Bend Performance
The optimized optical waveguide structure is designed to reduce additional optical loss when the fiber is routed around corners or through compact enclosures. This makes the fiber more practical for access-network and indoor installations where routing space cannot always remain straight.
Standard Glass Geometry with Reduced External Size
The 200 μm designation mainly refers to the coated fiber diameter rather than the glass cladding itself. The glass remains in the standard 125 μm-class range, while the smaller coating structure helps reduce the overall space required by the finished fiber.
Geometry Control for Cable Processing
For a smaller-diameter fiber, dimensional consistency becomes particularly important during cable assembly. Control of coating diameter, roundness and concentricity helps the fiber run more consistently through downstream processes such as coloring, buffering, splicing and cable assembly.
Why this matters to buyers: A smaller fiber diameter is useful only when the optical and geometric parameters remain suitable for the finished cable. China Super Tech focuses on matching the fiber specification with the customer's actual cable structure instead of treating 200 μm as a stand-alone marketing number.
Applications
FTTH and Access Networks
FTTH cables often pass through wall boxes, distribution points, indoor corners and customer-side terminals. These locations leave less room for cable routing, so bend performance becomes important. The G.657.A1 design helps control additional loss caused by normal routing bends, while the smaller coating diameter can support more compact cable construction.
Micro-Cable and Microduct Systems
Microduct and air-blown cable designs depend on limited internal space. Using a 200 μm-class fiber can reduce the space occupied by each fiber and give cable manufacturers more flexibility when designing high-fiber-count structures. The actual fiber count still needs to be checked against the microduct diameter and finished cable construction.
High-Density Fiber Distribution
Compact distribution boxes and communication cabinets may need to accommodate many fibers within a limited enclosure. The smaller coating structure can help reduce internal space requirements, while the G.657.A1 bend characteristics make the fiber suitable for routing around compact fiber-management components.
Compact Indoor Optical Cabling
In residential buildings, offices and commercial facilities, optical cables may need to pass through narrow conduits and around building structures. The combination of reduced coating diameter and bend-optimized performance makes this configuration suitable when cable size and routing flexibility are both important.
Related Fiber Solutions
If your project does not require a 200 μm configuration, you can also compare it with other G.657 options according to the required bend radius and cable structure.
Customization Services
Fiber Structure Matching
China Super Tech can review the customer's cable structure before production, including fiber count, tube dimensions and available internal space. This helps determine whether a 200 μm-class coating configuration is suitable rather than supplying a nominal size without considering downstream cable assembly.
Optical Parameter Confirmation
For projects with specific attenuation, mode field diameter, wavelength or bend-loss requirements, our technical team can review the target values before production. This gives cable manufacturers a clearer specification to validate during sample testing.
Compatibility with Cable Production
The fiber can be evaluated for loose-tube, tight-buffered, micro-cable and other cable structures. Our focus is on matching the fiber's geometry and optical requirements with the customer's existing production process, which can reduce unnecessary changes to downstream equipment and tooling.
Length, Spool and Packaging Options
Delivery length, spool arrangement, labeling and packaging can be discussed according to the customer's production schedule and logistics requirements. This is useful for both sample qualification and recurring bulk orders.
Repeat-Order Consistency
For repeat projects, the agreed fiber specification can be used as the production reference. Key optical and geometric parameters can be checked between batches so the fiber remains consistent with the customer's established cable-production process.
Sample Testing Before Bulk Orders
Customers developing a new micro-cable or high-density cable structure can first evaluate samples in their own production process. This allows the fiber-to-cable fit, splicing behavior and optical performance to be checked before moving to larger quantities.
Technical Specifications
| Parameter | Specification | Unit |
|---|---|---|
| Fiber Type | Single-Mode Fiber | - |
| ITU-T Category | G.657.A1 | - |
| Coating Structure | 200 μm-class coating configuration | μm |
| Cladding Diameter | 125 ± 0.7 | μm |
| Attenuation @1310 nm | ≤0.35* | dB/km |
| Attenuation @1550 nm | ≤0.21–0.22* | dB/km |
| Attenuation @1625 nm | ≤0.35* | dB/km |
| Operating Wavelength | 1260–1625 | nm |
| MFD @1310 nm | Approx. 9.2* | μm |
| MFD @1550 nm | Approx. 10.4* | μm |
| Cable Cutoff Wavelength | ≤1260* | nm |
| Fiber Grade | G.657.A1 / project-specific configuration | - |
| Typical Applications | FTTH, micro-cable, Microduct, high-density optical cable | - |
Frequently Asked Questions
Need a 200 μm Fiber for Your Cable Project?
Tell China Super Tech your target fiber count, cable structure, minimum bend requirement, operating wavelength and estimated order quantity. We can review the application and confirm the suitable fiber configuration before quotation.
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