1. Product Overview
The 1*2 TFF Filter PM Fiber Coupler 30:70 is a polarization-maintaining fiber standard coupler based on thin-film filtering (TFF) technology. Operating in the 1550nm±40nm wavelength band, it splits one input light into two outputs at a 30%:70% ratio while maintaining polarization characteristics.
2. Product Advantages
- Designed specifically for 30/70 splitting, accommodating both main and monitoring branches
- High extinction ratio, controllable polarization state
- High Return Loss and High Directivity
- Good Power Handling and Environmental Adaptability
- Serialized Platform, Flexible Selection
3. Product Features (Key Features)
| Parameters |
Unit |
1 x 2 |
| Splitting Ratio |
nm |
30/70 |
| Operating Wavelength |
nm |
1550 |
| Operating Bandwidth |
nm |
±40 |
| Insertion loss |
nm |
≤5.8/2.0 |
| Extinction Ratio |
dB |
≥20 |
| Return Loss |
dB |
≥50 |
4. Applications
- EDFA / Fiber Amplifier (Main Link + Monitoring/Sampling Port)
- Fiber Optic Instrument
- Coherent Communication
- Power Monitoring
- Fiber Sensor
FAQ
Q1: What are the operating wavelength and bandwidth of this product?
A: The center operating wavelength of this product is 1550nm, and the operating bandwidth is ±40nm, suitable for splitting, monitoring, and testing applications in C-band polarization-maintaining optical paths.
Q2: What are the main performance advantages of this 1×2 PM Fiber Coupler?
A: This product uses Corning Panda Fiber, featuring low insertion loss, high extinction ratio, and high return loss. At a 30/70 splitting ratio, its insertion loss is ≤5.8/2.0dB, extinction ratio is ≥20dB, return loss is ≥50dB, and maximum power handling is ≤500mW, ensuring stable polarization maintenance performance.
Q3: Does this product support customization?
A: Customization is supported. Customers can choose the fiber length, connector type, packaging form, and sheath specifications according to their needs. The product supports structures such as 250μm bare fiber, 900μm loose tube, and 2mm/3mm loose tube. Connectors can be selected as FC/APC, FC/UPC, or other customized types. By default, the connector key is aligned with the slow axis and blocked by the fast axis.
