1. Product Description

1×2 TFF Filter PM Fiber Coupler 1×2 Thin-Film Filtered Polarization-Maintaining Fiber Coupler 30:70 1550nm for EDFA, Coherent Communication, Power Monitoring and Fiber Sensing

2. Key Features

• 1×2 unequal splitting structure, standard splitting ratio 30:70
• Operating wavelength 1550nm, bandwidth ±40nm
• Uses Corning Panda polarization-maintaining fiber
• 30% end insertion loss ≤5.8dB, 70% end ≤2.0dB
• Extinction ratio ≥20dB
• Return loss ≥50dB

3. Applications

• EDFA fiber optic amplifier module
• Fiber optic instrumentation and testing system
• Coherent communication system
• Power monitoring system
• Fiber optic sensing platform
• Main optical path and reference optical path allocation
• Laboratory interferometry and link calibration platform

FAQ

Q1: What are the main performance advantages of this PM Fiber Coupler?

A: This product utilizes TFF thin-film filtering technology and Corning Panda polarization-maintaining fiber, featuring low insertion loss, high extinction ratio, and high return loss. Its 30% end insertion loss is ≤5.8dB, 70% end insertion loss is ≤2.0dB, extinction ratio is ≥20dB, and return loss is ≥50dB, improving system polarization stability and signal reliability.

Q2: Does this product support different packages and connector customization?

A: Customization is supported. The product is available in 250μm bare fiber, 0.9mm loose tube, and 2.0/3.0mm sheath structures. Connectors can be FC/APC, FC/UPC, or other customized types. The connector keying aligns with the slow axis of the polarization-maintaining fiber, facilitating consistent polarization direction during system integration.