4×4 Filter PM FBT Coupler 4×4 Filter Type Polarization Maintaining FBT Coupler For EDFA

This 4*4 Filter PM FBT Coupler is a high-performance polarization-maintaining (PM) fiber optic device based on FBT (Fused Biconical Taper) technology. 

With connectors, the handling power is 50mW only, IL is 0.3dB higher, RL is 5dB lower, and ER is 2dB lower. Connector key is aligned to slow axis.

• 4*4 Equal-Ratio Splitting (Splitting Ratio: 25:25:25:25)
• Utilizes Corning Panda Polarization-Maintaining Fiber
• Typical Insertion Loss: ≤7.5dB
• Maximum Excess Loss: ≤1.2dB
• Extinction Ratio: ≥20dB
• Return Loss: ≥50dB; Directivity: ≥50dB

• EDFA (Erbium-Doped Fiber Amplifiers)
• Fiber Laser Systems
• Coherent Communication Systems
• Fiber Optic Sensing and Monitoring
• Optical Instrumentation and Test Systems
• Scientific Research and Experimental Platforms

FAQ

Q1: What are the splitting ratio and operating wavelength of this 4×4 PM FBT Coupler?

A: The standard splitting ratio of this product is 25:25:25:25, the operating wavelength is 1550nm, and the operating bandwidth is ±15nm. It is suitable for multi-channel power equalization and signal distribution in C-band polarization-maintaining fiber systems.

Q2: What are the main performance advantages of this product?

A: This product uses Corning Panda Fiber, featuring low insertion loss, high extinction ratio, high return loss, and high directivity. Its insertion loss is ≤7.5dB, maximum additional loss is ≤1.2dB, extinction ratio is ≥20dB, return loss is ≥50dB, directivity is ≥50dB, and the maximum power handling capacity is up to 500mW.

Q3: Does this 4×4 Filter PM FBT Coupler support customization?

A: Customization is supported. Customers can select the operating wavelength, splitting ratio, package size, fiber sheath, fiber length, and connector type according to their needs. Connectors are available in FC/APC, FC/UPC, SC/APC, SC/UPC, LC/APC, LC/UPC, or other customized specifications; the connector key positions are aligned with the slow axis by default, facilitating integration with the polarization-maintaining system.