1x3/3x3 Port 780-1550nm Polarization Maintaining Coupler
Kerns Technology is a premier manufacturer of PM fused couplers in China. We provide tailored selections matching your ideal features, specifications, and system needs. We can custom the 1x3/3x3 PM coupler you ordered.
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Product Description
Product Description
The Kerns Technology 1x3/3x3 Port 780-1550nm Polarization Maintaining (PM) Coupler is a wideband passive optical component designed to split (1x3) or intercouple (3x3) light signals across 780-1550nm, while preserving polarization state via PM Panda fiber. It features a 33:33:33 split ratio, low additional loss (≤1.2dB), and 2W CW power handling—ideal for polarization-sensitive multi-wavelength systems.
Available in compact packages (φ3×54mm/φ4×70mm), this coupler supports key wavelengths (850/980/1064/1310/1550nm) and ensures stable performance across -5~+70°C, making it a core component for coherent communication, fiber sensing, and power monitoring applications.
Product Features
1. Dual Configuration Flexibility
Offers 1x3 (1 input → 3 outputs) and 3x3 (3 mutual coupling ports) options to match signal distribution/interconnection needs in diverse systems.
2. Wideband & Multi-Wavelength Compatibility
Covers 780-1550nm (±10~20nm bandwidth) — eliminates the need for multiple single-wavelength couplers in multi-band setups.
3. High Polarization & Low Loss Performance
Extinction ratio ≥18dB (PM Panda fiber) preserves polarization state for sensitive applications.
Max additional loss ≤1.2dB minimizes signal attenuation, with a uniform 33:33:33 split ratio.
4. High Power Handling
2W CW power capacity (1W with connectors) meets medium-power system demands, outperforming standard PM couplers (≤1W).
Product Applications
This 1x3/3x3 PM coupler is widely used in:
Coherent Communication Systems: Distributes 1550nm polarized signals in high-speed telecom links.
Fiber Sensing: Splits/couples polarized light for multi-channel strain, current, or gyro sensing.
Power Monitoring: Enables signal power distribution and monitoring in industrial optical systems.
Scientific Research: Supports multi-wavelength polarization experiments in photonics and quantum optics.
Technical Specification Table
| Parameter | Value |
|---|---|
| Wavelength Range | 780-1550nm (850/980/1064/1310/1550nm) |
| Bandwidth | ±10~20nm |
| Max Additional Loss | ≤1.2dB |
| Min Extinction Ratio | ≥18dB |
| Split Ratio | 33:33:33 |
| Power Tolerance | ±4% |
| Max CW Power | 2W (1W with connectors) |
| Fiber Type | PM Panda Fiber |
| Package Size | φ3×54mm (250μm bare fiber) / φ4×70mm (900μm loose tube) |
| Operating Temperature | -5~+70°C |
FAQs
Q1: What’s the difference between 1x3 and 3x3 configurations?
A1: 1x3 splits 1 input signal into 3 outputs; 3x3 enables mutual coupling between 3 ports (e.g., signal distribution and feedback in closed-loop systems).
Q2: How do connectors affect performance?
A2: With connectors, power handling drops to 1W, insertion loss increases by 0.3dB, and extinction ratio decreases by 2dB. Connectors are aligned to the fiber slow axis for minimal polarization impact.
Q3: Can the split ratio be customized?
A3: Yes. While the standard ratio is 33:33:33, we can provide custom split ratios (e.g., 20:40:40) based on your system’s signal distribution needs.
Q4: Is this coupler suitable for high-power applications?
A4: It supports 2W CW power (standard) — ideal for medium-power systems. For higher power (≥5W), we offer customized high-power PM couplers with reinforced packaging.
