4×4 Filter PM FBT Coupler 4×4 Filter Type Polarization Maintaining FBT Coupler For EDFA
4×4 Filter PM FBT Coupler (4×4 Filter-Type Polarization-Maintaining FBT Coupler) — 25:25:25:25 Split Ratio — For EDFA, Fiber Lasers, Coherent Communication, And Fiber Sensors
This 4*4 Filter PM FBT Coupler is a high-performance polarization-maintaining (PM) fiber optic device based on FBT (Fused Biconical Taper) technology.
| Parameters | Unit | 4x4 |
|---|---|---|
| Splitting Ratio | nm | 25:25:25:25 |
| Operating Wavelength | nm | 1550 |
| Operating Bandwidth | nm | ±15 |
| Insertion loss | dB | ≤7.5 |
| Max. Excess Loss | dB | ≤1.2 |
| Extinction Ratio | dB | ≥20 |
| Return Loss | dB | ≥50 |
| Directivity | dB | ≥50 |
| Power Handling | mW | ≤500 |
| Operating Temperature | ℃ | -5~+75 |
| Storage Temperature | ℃ | -40～+85 |
| Fiber Type | / | Corning Panda fiber |
| Fiber Length | m | 1.0±0.1m, others on request |
| Connector | / | FC/APC,FC/UPC, others on request |
| Package Dimension | mm | 100*80*10 |
With connectors, the handling power is 50mW only, IL is 0.3dB higher, RL is 5dB lower, and ER is 2dB lower. Connector key is aligned to slow axis.
- 4*4 Equal-Ratio Splitting (Splitting Ratio: 25:25:25:25)
- Utilizes Corning Panda Polarization-Maintaining Fiber
- Typical Insertion Loss: ≤7.5dB
- Maximum Excess Loss: ≤1.2dB
- Extinction Ratio: ≥20dB
- Return Loss: ≥50dB; Directivity: ≥50dB
- EDFA (Erbium-Doped Fiber Amplifiers)
- Fiber Laser Systems
- Coherent Communication Systems
- Fiber Optic Sensing and Monitoring
- Optical Instrumentation and Test Systems
- Scientific Research and Experimental Platforms
FAQ
Q1: What are the splitting ratio and operating wavelength of this 4×4 PM FBT Coupler?
A: The standard splitting ratio of this product is 25:25:25:25, the operating wavelength is 1550nm, and the operating bandwidth is ±15nm. It is suitable for multi-channel power equalization and signal distribution in C-band polarization-maintaining fiber systems.
Q2: What are the main performance advantages of this product?
A: This product uses Corning Panda Fiber, featuring low insertion loss, high extinction ratio, high return loss, and high directivity. Its insertion loss is ≤7.5dB, maximum additional loss is ≤1.2dB, extinction ratio is ≥20dB, return loss is ≥50dB, directivity is ≥50dB, and the maximum power handling capacity is up to 500mW.
Q3: Does this 4×4 Filter PM FBT Coupler support customization?
A: Customization is supported. Customers can select the operating wavelength, splitting ratio, package size, fiber sheath, fiber length, and connector type according to their needs. Connectors are available in FC/APC, FC/UPC, SC/APC, SC/UPC, LC/APC, LC/UPC, or other customized specifications; the connector key positions are aligned with the slow axis by default, facilitating integration with the polarization-maintaining system.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.