Single mode double window coupler
This coupler is a compact, high-performance passive component characterized by its low excess loss, high stability, and exceptional reliability. Featuring an epoxy-free optical path and available in various coupling ratios, it ensures superior long-term performance in demanding environments. It is widely deployed in long-haul telecommunications, CATV systems, fiber optic sensors, FTTH, and local area networks (LAN) for efficient optical signal distribution and monitoring.
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
Singlemode Dual Window Wideband Couplers
| Parameter | P Grade | A Grade |
| Coupling Ratio（%） | 50/50 | 50/50 |
| Excess Loss (Typical)（dB） | 0.1 | 0.1 |
| Maximum Insertion Loss（dB） | 3.5 | 3.5 |
| Uniformity (Max.)(dB) | 0.7 | 1.0 |
| Polarization Sensitivity (dB) | 0.15 | 0.2 |
| Operating Wavelength（nm） | 1310/1550±40 or custom wavelength | |
| Coupling Ratio Range（%） | 1~50 | |
| Directivity (Min.)(dB) | ≥55 | |
| Operating Temperature(℃) | -20~+80 | |
| Storage Temperature(℃) | -20~+80 | |
| Fiber Type | Corning singlemode SMF-28, DS fiber or flexcore | |
| Fiber Pigtail Length（m） | 1 | |
| Port Configuration | 1×2 or 2×2 | |
| Dimensions (mm) | Package D,E,F,G | |
Coupling Ratio/Insertion Loss Conversion Chart
| Coupling Ratio | Insertion Loss (P Grade) | Insertion Loss (A Grade) |
| 40/60 | 4.7/2.6 | 5.0/2.8 |
| 30/70 | 6.0/2.0 | 6.2/2.1 |
| 20/80 | 7.8/1.4 | 8.4/1.6 |
| 10/90 | 11.2/0.6 | 12.0/0.8 |
| 5/95 | 14.2/0.4 | 15.2/0.5 |
| 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 | Wavelength | Fiber Type | Connector | Fiber Length |
| 1=1*2 | 1310nm | 1=Bare fiber | FC/PC | 0=0.5m |
| 2=2*2 | 1550nm | 2=900um Loose tube | FC/APC | 1=1m |
| 3=1*3 | 1310/1550nm | – | SC/PC | 2=2m |
| 4=1*4 | Custom | – | SC/APC ect. |
ect. |
