When buying 1×2 splitter FBT type, many customer may not be so clear about the detail request, due to the end client may describe clearly, so let’s help you figure out what is your customer need by following our guidance:
Splitter FBT Core Parameter Matching
Splitting ratio requirements
- For non-equal-division scenarios such as pump beam combining, sensor monitoring, please prefer to choose fused taper splitters (FBT splitter) , which support customization of any ratio from 1/99 to 50/50.
- For equal division scenarios such as LAN signal distribution, please choose 50:50 standard splitting ratio model, its additional loss is within 0.3dB.
During the production process, Yingda use the identification ring to let customers know the splitting ratio with the naked eye. If there is no special explanation, blue indicate small splitting ratio and red indicate large splitting ratio.
Wavelength adaptability
- Single window applications such as 1310nm, 1490nm or 1550nm transmission, please use conventional single window splitters for lower costs, not 1310/1490nm, or 1490/1550nm or 1310/1490/1550nm.
- Multimode systems such as 850/1310nm dual-window, please specify dual window couplers to ensure stable loss within the bandwidth±20nm.
In the final splitter FBT packaging box, each product will be equipped with a factory test report. The available wavelength of this FBT splitter will be marked at the top of the test report to facilitate customer inspection and use.
FBT Loss control
| Indicators | Recommended value | Scenario requirements |
| Additional loss | ＜0.5dB (preferably ＜0.3dB) | Long-distance communication system |
| Polarization-dependent loss | ＜0.1dB | Polarization-maintaining fiber laser |
| Uniformity | ＜0.8dB | Multi-channel parallel sensing |
Each splitter FBT must be strictly tested before leaving the factory and can only be labeled and shipped after 100% qualified. Customers can see all parameter details on our test report: IL, PDL, uniformity, etc.
Splitter FBT Selection by Environmental Adaptability
Temperature range
- In normal environment from -40℃ to +85℃, commercial packaging can meet the requirements, no need special requirement.
- In harsh industrial environment, we must enhanced packaging such as metal substrate + silicone resin to suppress thermal stress cracks.
Physical Space Limitations
Generally, splitter FBT has steel tube packaging, small cassette packaging and ABS module packaging. Different packaging methods occupy different spaces. Therefore, when choosing a FBT splitter, please make a reasonable choice based on the market scenario and cost budget.
Steel tube splitter FBT
- Steel tube size: Ø3×54mm
- Applicable to high density integration application, like installation in fiber distribution box, fiber splitter box
ABS splitter FBT
- Splitter cassette size：10*20*90mm
- Suitable for outdoor pole station deployment,the ABS module package can improve mechanical protection.
Scenario-based Selection Guide
| Application type | Recommended configuration | Key basis |
| Fiber laser | Polarization-maintaining fiber coupler, extinction ratio > 20dB | Avoid polarization distortion affecting gain efficiency |
| FTTH tree architecture | Low-cost even split type (50 50 fiber couper) | High economical cascade expansion |
| Multimode data center | 50/125µm broadband splitter, supports 850nm | Compatible with OM3/OM4 multimode fiber |
| High power pump beam combining | Power tolerance > 1W, splitting ratio can be asymmetric | Prevent thermal damage in the fused cone area |
Cost and scalability trade-off
If splitting numer is 1×2, 1×3 or 1×4, the cost of the FBT splitter solution is more than 30% lower than that of the PLC splitter, so suggest to use FBT splitter. However, if need future expansion to 1×8 or more channels, recommend to directly use PLC splitter to avoid cascade loss accumulation.
That is why we can see on market, there is much more 1×8 1×16 or more plc splitter on market demand but 1×2 FBT splitter more. However, with mass production and falling costs approach 1×2 PLC splitter, maybe gradually 1×2 fiber optic coupler will use less and less.
Tips for avoiding pitfalls:
Avoid using FBT splitters in environments >85℃ or in cascade scenarios which use more channels than 1×8 splitter to prevent uniformity degradation and a sudden reduction in lifespan.
