SM & PM Mode Field Diameter (MFD) Fiber Array for Silicon Photonics & PIC Coupling 1. Product Overview The GracyFiber Mode Field Diameter (MFD) Fiber Array is a precision fiber array designed for low-loss and efficient optical coupling in photonic integration and packaging applications. By controlling the mode field diameter, fiber pitch, and facet geometry, the MFD Fiber Array supports accurate optical mode matching between fibers and photonic devices. 2. Key Features SM and