What is a Fiber Array (FA)?

A Fiber Array, commonly abbreviated as FA, is a critical interface component in Silicon Photonics (SiPh) packaging, Photonic Integrated Circuits (PIC), and Co-Packaged Optics (CPO) architectures. It is responsible for efficiently coupling "external optical fibers" with "internal chip waveguides." 

The structure is manufactured using a high-precision V-Groove substrate, where multiple fibers are aligned and fixed at extremely precise intervals (Pitch). These fibers are then secured with a cover plate, bonded, and polished to perfection. In high-speed data centers and AI computing clusters, the FA serves as the essential physical bridge for large-scale, high-density optical signal transmission. 

Main Application Scenarios 

Silicon Photonics & CPO Packaging: Serving as the primary interface connecting the optical engine to the external network. 

High-Speed Optical Transceiver Modules: Applied in 400G / 800G / 1.6T and next-generation high-bandwidth transmissions (such as OSFP and QSFP-DD). 

Wavelength Selective Switches (WSS): Utilized for the precise routing of optical signals within ROADM (Reconfigurable Optical Add-Drop Multiplexer) networks. 

Optical Interconnects for AI: Providing high-density, low-latency connectivity for GPU-to-GPU or rack-to-rack optical communication.