PM 1310/1480/1550nm Coupler (1×2, 2×2)
This Polarization-Maintaining (PM) Fiber Coupler provides low excess loss, compact packaging, and flexible coupling ratios with high stability and reliability. Designed for operation at 1310 nm, 1480 nm, and 1550 nm wavelengths, it supports both 1×2 and 2×2 port configurations while maintaining high polarization extinction ratio and minimal polarization-dependent loss, featuring an epoxy-free optical path for enhanced power handling and long-term reliability.
Ideal for long-haul telecommunications, CATV systems, FTTH, and fiber sensor networks, the coupler is available in multiple performance grades and package styles to suit various integration needs. Its wide operating temperature range and customizable options including coupling ratio, fiber type, connector style, and cable length ensure flexible adaptation to specific system requirements.
Description
Product Features & Applications
| Features | Applications |
| Low Excess Loss | Long-haul Telecommunications |
| Compact Size | CATV Systems & Fiberoptic Sensors |
| Various Coupling Ratio | FTTH & LAN |
| High stability and reliability | Local Area Network |
| Epoxy free on optical path |
Performance Specifications
| Single Standard Couplers | ||
| Grade | P Grade | A Grade |
| Coupling Ratio（%） | 50/50 | 50/50 |
| Polarization Sensitivity (dB) | 0.15 | 0.2 |
| Min. Extinction Ratio | 20 | |
| Operating Wavelength（nm） | 1310/1480/1550 or custom wavelength | |
| Coupling Ratio（%） | 1~50 | |
| Directivity (dB) | ≥55 | |
| Operating Temperature(℃) | -20~+80 | |
| Storage Temperature(℃) | -20~+80 | |
| Fiber Type | PM1310/PM1550 | |
| Fiber Pigtail Length（m） | 1/1.5/2 | |
| Port Configuration | 1×2 or 2×2 | |
Coupling Ratio/Insertion Loss Conversion Chart
| Coupling Ratio | Insertion Loss (P Grade) | Insertion Loss (A Grade) |
| 50/50 | 3.5/3.5 | 3.6/3.6 |
| 30/70 | 6.0/2.3 | 6.1/2.4 |
| 20/80 | 8.0/1.6 | 8.2/1.7 |
| 10/90 | 11.5/1.1 | 12/1.2 |
| 5/95 | 14.0/0.8 | 14.5/0.85 |
| 3/97 | 16.0/0.7 | 16.5/0.75 |
| 2/98 | 18.5/0.45 | 19/0.5 |
| 1/99 | 22.0/0.4 | 22.5/0.45 |
Package Dimensions & Pigtail Style
| Package Dimensions: | |
| Package D | 3mm x 45mm 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 |
The relation picture of Insertion & Wavelength、Temperature
Ordering Information
| Product | Wavelength | Fiber Type | Connector | Fiber Length |
| 1=1*2 | 1310nm | 1=Bare fiber | FC/PC | 0=0.5m |
| 2=2*2 | 1480nm | 2=900um Loose tube | FC/APC | 1=1m |
| 3=1*3 | 1550nm | 3=PM1310 | SC/PC | 2=2m |
| 4=1*4 | 4=PM1550 | SC/APC | ect. |
