Description
Single mode Dual Window Coupler 1×2, 2×2 offer very low insertion loss, low polarization dependence and excellent environmental stability. Accurate coupling ratio from 50/50 to 1/99, fiber type 250um bare fiber, 3mm and 900um loose tube fiber are available with very tight uniformity in a wide wavelength range of both 1310 nm and 1550 nm windows. Single mode dual window coupler find extensive application to perform power splitting and monitoring functions in all kinds of optical communication systems.
1*2 FBT Coupler 15%:85% Features
- Low Excess Loss
- Various Coupling Ratio
- Compact Size
1*2 FBT Coupler 15%:85% Applications
- Long-haul
- Telecommunications
- CATV Systems & Fiberoptic
- Sensors
- Local Area Network
1*2 FBT Coupler Coupling Ratio Insertion Loss Conversion Chart
| Coupling Ratio | Insertion Loss | |
| Premium | A Grade | |
| 40/60 | 4.7/2.7 | 5.0/2.9 |
| 30/70 | 6.0/1.9 | 6.4/2.1 |
| 20/80 | 7.9/1.2 | 8.5/1.4 |
| 10/90 | 11.3/0.5 | 12.0/0.8 |
| 5/95 | 14.0/0.35 | 14.6/0.43 |
| 1/99 | 22.5/0.25 | 23.0/0.35 |
| Coupling Ratio(%) | 1~50 | |
| Directivity (dB) | >55 | |
| Operating Temperature (℃) | -20 – + 85 | |
| Storage Temperature (℃) | -40 – + 85 | |
| Fiber Type | Corning Single mode SMF-28, DS Fiber, or flex core | |
| Fiber Pigtail Length (m) | 1 | |
| Port Configuration | 1×2 or 2×2 | |
| Package Dimension | Package D,E,F,G | |
1*2 FBT Coupler Package Dimensions & Pigtail Style
| Package Dimensions: | |
| Package D: | 3mm x 40mm stainless steel tube |
| Package E: | 3mm x 54mm stainless steel tube |
| Package F: | 3mm x 60mm stainless steel tube |
| Package G: | 10mm x 20mm x 90mm case |
| Pigtail Style: | |
| Package D,E, : | 250um bare fiber |
| Package F: | 250um bare fiber or 900um loose tube |
| Package G: | 2mm,3mm cable or 900um loose tube |
1*2 FBT Coupler 15%:85% Product Details
Due to FBT coupler is fused splitter, it is made by fused welding, so can make different split ratio coupler like 50:50, 10:90, 15:85, 20:80, 25:75, 30:70, 35:65, 40:60, 45:55, 50:50, 1:99 etc.
In order to distinguish different split ratio outputs, we use different color loose tube, like red and blue, red and black, or green yellow; for the input pigtails we can use any color as wish, the color and the length can be customize, but our standard is red and blue for outputs, and white for input, if customer don’t have own special request.
1×2 FBT splitter is with 1fiber input pigtail and 2 fibers outputs, and the device to connector both pigtails are not chip (for PLC Splitter) but welding machine to make them fused together, and outside the joint there is a stainless steel tube to protect it.
The couplers can be packed by blister box for better protection, there is slots for the adapters which ensure optical performance and no fiber break during long time transportation.
All FBT coupler will be test 100%in factory before delivery and with test report for each item. If customer need cheap package, plastic pp bag is available, please contact our sales team.
