Triple-window Design Fused Taper Coupler
Kerns Technology is a premier manufacturer of fiber optic components in China. We provide tailored selections matching your ideal features, specifications, and system needs. We can custom the triple-window fused taper coupler you ordered.
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Product Description
Product Description
The Kerns Technology Triple-Window Design Fused Taper Coupler (TWFC) is a high-performance passive fiber optic component engineered for multi-wavelength optical systems. By utilizing advanced fused taper technology, it enables stable light splitting/combining across three key communication wavelengths (1310nm, 1490nm, 1550nm) — a critical capability for modern fiber access networks.
Available in Grade P (premium) and Grade A (standard) configurations, this coupler delivers industry-leading low insertion loss (as low as 0.07dB for Grade P) and polarization-dependent loss (≤0.15dB), ensuring minimal signal attenuation across all target wavelengths. Its robust fused structure and wide operating temperature range (-40~+85°C) guarantee long-term stability in harsh deployment environments, while flexible port (1×2/2×2) and splitting ratio (1/99~50/50) options make it adaptable to diverse fiber communication setups.
Product Features
1. Triple-Window Wavelength Compatibility
Supports simultaneous operation at 1310±40nm, 1490±10nm, and 1550±40nm — perfectly aligned with the wavelength bands used in fiber-to-the-home (FTTH) and access network systems.
2. Ultra-Low Loss Performance
Grade P offers 0.07dB typical excess loss and ≤0.15dB polarization-dependent loss, outperforming standard couplers (often ≥0.10dB excess loss) to preserve signal integrity in long-haul links.
3. Precise Splitting Ratio Control
Covers splitting ratios from 1/99 to 50/50 with tight tolerance (e.g., ≤3.6% deviation for 50/50 Grade P), ensuring consistent power distribution across output ports.
4. High Directionality & Stability
Directionality ≥55dB prevents back-reflection interference, while the fused taper structure maintains performance stability under temperature fluctuations (-40~+85°C) and mechanical stress.
5. Flexible Configuration Options
Offers 1×2/2×2 port designs, SMF-28e fiber compatibility, and customizable pigtail types (250μm bare fiber/900μm loose tube) to fit diverse system integration needs.
Grade P vs. Grade A Performance Comparison Table
| Parameter | Unit | Grade P (Premium) | Grade A (Standard) |
|---|---|---|---|
| Operating Wavelength Range | nm | 1310±40, 1490±10, 1550±40 | 1310±40, 1490±10, 1550±40 |
| Typical Excess Loss | dB | ≤0.07 | ≤0.10 |
| Splitting Ratio Tolerance | - | - | - |
| 50/50 | % | ≤3.6 | ≤3.8 |
| 40/60 | % | ≤4.7/2.7 | ≤4.9/2.9 |
| 30/70 | % | ≤6.0/1.9 | ≤6.3/2.1 |
| 20/80 | % | ≤7.9/1.3 | ≤8.4/1.4 |
| 10/90 | % | ≤9.2-11.0/0.75 | ≤8.8-11.4/0.8 |
| 5/95 | % | ≤12.05-14.20/0.4 | ≤11.55-14.65/0.5 |
| 2/98 | % | ≤15.60-18.55/0.3 | ≤15.00-19.20/0.4 |
| 1/99 | % | ≤18.45-21.70/0.25 | ≤17.80-22.40/0.35 |
| Polarization-Dependent Loss | dB | ≤0.15 | ≤0.20 |
| Directionality | dB | ≥55 | ≥55 |
| Operating Temperature | °C | -40~+85 | -40~+85 |
Product Applications
This triple-window fused taper coupler is widely used in:
Fiber Access Networks (FTTH/FTTB): Combines/splits signals across 1310nm (user data), 1490nm (video), and 1550nm (CATV) bands for multi-service transmission.
Optical Distribution Networks (ODN): Enables passive power splitting in centralized fiber optic distribution systems.
Fiber Optic Test Equipment: Serves as a stable splitting component in optical power meters and spectrum analyzers.
Telecom Backhaul Links: Supports wavelength-division multiplexing (WDM) in short-to-medium haul communication systems.
FAQs
Q1: What’s the advantage of a triple-window coupler over dual-window models?
A1: It supports three key communication wavelengths (1310/1490/1550nm) in one component, eliminating the need for multiple single-wavelength couplers — reducing system complexity and deployment costs for multi-service networks.
Q2: How does the coupler perform with connectors installed?
A2: When equipped with connectors, insertion loss increases by 0.3dB and return loss decreases by 5dB. We recommend factory-installed connectors for optimal alignment and performance.
Q3: Can the splitting ratio be customized for my specific system?
A3: Yes. We offer splitting ratios from 1/99 to 50/50, and can provide custom ratios (e.g., 70/30) to match your network’s power distribution requirements.
Q4: Is this coupler suitable for outdoor deployment?
A4: Absolutely. Its wide operating temperature range (-40~+85°C) and robust fused structure make it compatible with outdoor ODN cabinets and aerial fiber deployments.
