3×3 Polarization-Maintaining Coupler (1310&1550 nm)
The 3×3 Polarization Maintaining Coupler is a high-performance PM fiber coupler fabricated using fused biconical taper technology. It operates at dual wavelengths of 1310nm and 1550nm with a 3×3 (33:33:33 equal split) port configuration. Key features include low insertion loss, high extinction ratio, high return loss, and excellent environmental stability and reliability. The device complies with Telcordia GR-1209-CORE and GR-1221-CORE standards and is RoHS certified. Commonly used in fiber lasers, fiber sensors, communication systems, test equipment, and polarization-maintaining optical systems. Performance grades: - Excess Loss: Grade P ≤0.8dB,, Grade A ≤1.0dB, - Uniformity: ≤0.7dB, - Extinction Ratio: ≥18 dB (Grade P) / ≥16 dB (Grade A) - Return Loss: ≥50 dB (Grade P) / ≥45 dB (Grade A) - Directivity: ≥50 dB - Maximum Handling Power: 2 W - Operating Temperature: -20 to +70°C - Storage Temperature: -50 to +85°C - Fiber Type: PM Panda - Package Size: Φ3.0×70 mm or Φ3.0×54 mm
3×3 P-grade 1310&1550nm
Available Options
Key Features
- Low Insertion Loss
- High extinction ratio
- High Return Loss
- Excellent environmental stability and reliability
- Fused Biconical Taper (FBT) Process
- Dual-wavelength operation
Specifications
| Parameters | Unit | 50:50 | 90:10 | 80:20 | 70:30 |
|---|---|---|---|---|---|
| Splitting Ratio | - | 50:50 | 90:10 | 80:20 | 70:30 |
| Channel Count | - | 2×2 | 2×2 | 2×2 | 2×2 |
| Central wavelength | nm | 1064 | 1064 | 1064 | 1064 |
| Operating wavelength range | nm | ±5 | ±5 | ±5 | ±5 |
| Typical Insertion Loss | dB | ≤3.5 | ≤1.2 | ≤1.8 | ≤2.2 |
| Maximum Insertion Loss | dB | ≤4.0 | ≤1.5 | ≤2.2 | ≤2.8 |
| Split ratio uniformity | dB | ±2 | ±2 | ±2 | ±2 |
| Polarization Extinction Ratio | dB | ≥20 | ≥20 | ≥20 | ≥20 |
| Return Loss | dB | ≥50 | ≥50 | ≥50 | ≥50 |
| Polarization-dependent loss | dB | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 |
| Maximum Optical Power (CW) | mW | 300 | 300 | 300 | 300 |
| Fiber Type | - | PM Panda Fiber | PM Panda Fiber | PM Panda Fiber | PM Panda Fiber |
| Operating Temperature | ℃ | -5~+50 | -5~+50 | -5~+50 | -5~+50 |
| Storage Temperature | ℃ | -40~+85 | -40~+85 | -40~+85 | -40~+85 |
Note: The above parameters are typical values; actual specifications may vary slightly depending on the specific configuration. Other splitting ratios are available upon request—please consult our technical team.
Order Information
| Options | Code | Description |
|---|---|---|
| Central wavelength | 1064 | 1064nm |
| Splitting Ratio | 50:50 | Equal-power coupler |
| 90:10 | 90%:10% coupling | |
| 80:20 | 80%:20% coupling | |
| 70:30 | 70%:30% coupling | |
| Fiber Patch Cord Type | 0 | 250μm bare fiber |
| 1 | 900μm loose tube | |
| 2 | 2.0mm loose tube | |
| 3 | 3.0mm loose tube | |
| Fiber Length | - | 1m, 2m, etc. (customizable) |
| Connector Type | 0 | FC/UPC |
| 1 | FC/APC | |
| 2 | SC/UPC | |
| 3 | SC/APC | |
| 4 | LC/UPC | |
| 5 | LC/APC |
Order Example: PM-C-1064-5050-1-1m-0 denotes a polarization-maintaining 2×2 coupler, 1064nm wavelength, 50:50 splitting ratio, 900μm loose tube, 1m fiber length, and FC/UPC connectors.
Specifications
| Parameters | Unit | P-Level | Grade A |
|---|---|---|---|
| Port Type | - | 3×3 (33:33:33) | |
| Operating wavelength range | nm | 1310±20 & 1550±20 | |
| Additional Loss | dB | ≤0.8 | ≤1.0 |
| Uniformity | dB | ≤0.7 | ≤0.7 |
| Extinction Ratio (Type F) | dB | ≥18 | ≥16 |
| Splitting Ratio | % | ±5 | ±7 |
| Return Loss | dB | ≥50 | ≥45 |
| Directional | dB | ≥50 | |
| Power Handling | W | ≤2 | |
| Tensile Load | No | ≤5 | |
| Fiber Type | - | PM Panda Fiber | |
| Operating Temperature | ℃ | -20~+70 | |
| Storage Temperature | ℃ | -50~+85 | |
| Package Size | mm | Φ3.0×70 or Φ3.0×54 | |
Note: All specifications are for connectorless devices. For devices with connectors, insertion loss increases by 0.3 dB, return loss decreases by 5 dB, and extinction ratio drops by 2 dB; connectors key on the slow axis. "B" denotes dual-axis operation; "F" indicates fast-axis blocking.
Order Information
| Options | Code | Description |
|---|---|---|
| Product Description | P | Polarization |
| M | Maintaining (Polarization-Maintaining) | |
| F | Fused | |
| C | Coupler | |
| Port Type | 1X2 | 1×2 |
| 2X2 | 2×2 | |
| 3X3 | 3×3 | |
| Operating Wavelength | 98 | 980nm |
| 06 | 1064nm | |
| 15 | 1550nm | |
| 13 | 1310nm | |
| Axis Type | F | F (Fast Axis Block) |
| B | B (Dual-axis Operation) | |
| Splitting Ratio | 33 | 33:33:33 (averaged over 3 × 3) |
| Fiber Patch Cord Type | 0 | 250μm bare fiber |
| 1 | 900μm loose tube | |
| Port1~6 Connector Type | 0 | No Connector |
| 1 | FC/UPC | |
| 2 | FC/APC | |
| 3 | SC/UPC | |
| 4 | SC/APC | |
| Package Size | 37 | Φ3.0×70mm |
| 35 | Φ3.0×54mm | |
| Fiber Length | 05 | 0.5m |
| 08 | 0.8m | |
| 10 | 1.0m | |
| 12 | 1.2m |
Ordering Example: PMFC-3X3-13-F-33-0-0-37-10 denotes a polarization-maintaining fused coupler with 3×3 ports, operating at 1310nm wavelength, F-type (fast axis blocked), splitting ratio of 33:33:33, bare fiber diameter of 250μm, no connectors, package size of Φ3.0×70mm, and fiber length of 1.0m.