4x4 Filter PM Fiber Coupler 1550nm Polarization Maintaining Fiber Splitter 25 25 25 25 For EDFA Coherent Communication Power Monitoring And Fiber Sensing

4×4 Filter PM Fiber Coupler 4×4 Filter-Type Polarization-Maintaining Fiber Coupler 1550nm 25:25:25:25 for EDFA, Coherent Communication, Power Monitoring and Fiber Sensing

• 4×4 symmetrical structure, splitting ratio 25:25:25:25
• Operating center wavelength 1550nm, bandwidth ±15nm
• Uses Corning Panda polarization-maintaining fiber
• Single-port insertion loss ≤7.5dB
• Maximum additional loss ≤1.2dB
• Extinction ratio ≥20dB
• Return loss ≥50dB, directivity ≥50dB
• Maximum optical power handling ≤300mW
• Operating temperature -5~+75℃, storage temperature -40~+85℃
• Supports 250μm, 0.9mm, 2.0/3.0mm structures and various connector customizations

• EDFA fiber optic amplification system
• Fiber optic instrumentation and testing platform
• Multi-channel coherent communication system
• Power monitoring platform
• Fiber optic sensing system
• Multi-arm interferometry and experimental optical path construction

Q1: What is the splitting ratio of this 4×4 PM Fiber Coupler?

A: The standard splitting ratio of this product is 25:25:25:25, which can achieve uniform coupling and stable transmission of four signals in the 1550nm band, suitable for multi-channel power equalization, monitoring, and testing applications.

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

A: This product uses Corning Panda polarization-maintaining fiber, which features low insertion loss, high extinction ratio, high return loss, and high directivity. Its insertion loss is no higher than 7.5dB, extinction ratio ≥20dB, return loss ≥50dB, and directivity ≥50dB, effectively improving the polarization stability and signal transmission reliability of the system.

Q3: Does this 4×4 polarization-maintaining coupler support customization?

A: Customization is supported.