Taper Coupler

Product Description

Engineered using advanced fused biconical taper (FBT) technology, it creates a gradual transition in fiber diameter to enable evanescent field coupling. This device supports a wide range of configurations, including 2x2, 1xN, and NxN couplers, with customizable coupling ratios (10%–90%) and wavelength bands (850 nm to 2200 nm). Its low-loss design and polarization-insensitive operation make it ideal for applications requiring stable power distribution in fiber optic systems. The coupler is housed in a ruggedized stainless-steel jacket for mechanical protection and environmental stability.

Features

High Coupling Efficiency: Achieves typical insertion loss ≤0.3 dB and uniformity ≤±0.5 dB across the specified wavelength range.

Wide Wavelength Support: Compatible with multi-mode (850 nm, 1310 nm) and single-mode (1310 nm, 1550 nm, 1625 nm) fibers, including speciality fibers like erbium-doped or Raman-active fibers.

Low Polarization Dependence: Polarization-dependent loss (PDL) ≤0.1 dB, ensuring consistent performance regardless of input polarization state.

Mechanical Robustness: Withstands tensile forces up to 50 N and operates reliably in temperature ranges from -40°C to 85°C.

Customizable Design: Tailored coupling ratios, fiber types, and connector options (FC/APC, SC/APC, LC) available for specific application needs.

Applications

Fiber Laser Systems: Combines pump light with signal light in multi-stage amplification setups.

Optical Sensing Networks: Distributes light to multiple sensors in distributed temperature or strain monitoring systems.

Telecom & Datacom: Enables power splitting in wavelength-division multiplexing (WDM) and passive optical networks (PONs).

Research & Development: Used in interferometers, spectroscopy, and quantum optics experiments requiring precise power allocation.

Industrial Optics: Supports laser beam combining for material processing applications like cutting and welding.

Faq

Q: How is the coupling ratio defined?

A: The ratio of output power in each port relative to the input power, customized during the tapering process.

Q: Can it handle high-power laser applications?

A: Yes, high-power versions support up to 500 mW continuous wave (CW) for single-mode and 2 W for multi-mode fibers.

Q: What is the typical return loss?

A: ≥55 dB for standard configurations, minimizing signal reflections.

Q: Does it require active alignment during installation?

A: No, the pre-terminated connectors ensure passive alignment for easy integration.

Q: How long does it take to produce a custom coupler?

A: Standard lead time is 7–10 business days for non-complex configurations.