PM 780/808/850nm Coupler (1×2, 2×2)
This Polarization-Maintaining (PM) Fiber Coupler offers low excess loss, compact packaging, and versatile coupling ratios with high stability and reliability. Designed for operation at 780 nm, 808 nm, and 850 nm wavelengths, it supports both 1×2 and 2×2 port configurations while maintaining high polarization extinction ratio and low polarization-dependent loss.
Ideal for long-haul telecommunications, fiber sensors, CATV systems, and coherent communications, 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 |
| FTTH & LAN | |
| Various Coupling Ratio | Local Area Network |
| Fiber Sensor | |
| High stability and reliability | Coherent Communication |
| Power Monitor |
Performance Specifications |
| Grade | P Grade | A Grade |
| Coupling Ratio（%） | 50/50 | 50/50 |
| Excess Loss (Typical)（dB） | 0.07 | 0.1 |
| Polarization Sensitivity (dB) | 0.15 | 0.2 |
| Min. Extinction Ratio | 20 | |
| Operating Wavelength（nm） | 780/808/850/ or custom wavelength | |
| Coupling Ratio（%） | 1~50 | |
| Directivity (dB) | ≥55 | |
| Operating Temperature(℃) | -20~+80 | |
| Storage Temperature(℃) | -20~+80 | |
| Fiber Type | PM780/PM850 | |
| Fiber Pigtail Length（m） | 1/1.5/2 | |
| Port Configuration | 1×2 or 2×2 | |
Coupling Ratio/insertion Loss Conversion Chart |
| Coupling Ratio | lnsertion Loss | |
| P Grade | A Grade | |
| 50/50 | 6.8/6.8 | 7.0/7.0 |
| 40/60 | 4.4/2.5 | 4.6/2.8 |
| 30/70 | 5.6/1.8 | 6/2.0 |
| 20/80 | 7.4/1.1 | 7.7/1.4 |
| 10/90 | 10.8/0.6 | 11.6/0.8 |
| 5/95 | 14.2/0.4 | 14.6/0.5 |
| 2/98 | 18.5/0.2 | 19.0/0.3 |
| 1/99 | 21.0/0.2 | 21.5/0.26 |
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 | C=CWDM Device | Fiber Type | Connector | Fiber length |
| 1=1*2 | 780nm | 1=Bare fiber | FC/PC | 0=0.5m |
| 2=2*2 | 808nm | 2=900umLoose tube | FC/APC | 1=1m |
| 3=1*3 | 850nm | 3=PM780 | SC/PC | 2=2m |
| 4=1*4 | 4=PM850 | SC/APC | ect. | |
| ect. |
