1x2 / 2x2 Mini Single Mode Fiber Coupler (FSMC / FWBC / DWFC)
Miniature Single-Mode Fused Fiber Coupler in an ultra-compact package (dia. 2.4 x 25 mm or dia. 3.0 x 40 mm). Available in single window (FSMC), wideband (FWBC), and dual window (DWFC) versions across 1310nm and 1550nm bands with low excess loss (<=0.1 dB) and high directivity (>55 dB).
Technical Specifications
A Grade and P Grade available. Ultra-mini package (dia. 2.4 x 25 mm) available with 250um bare fiber leads. Connectors add 0.3 dB insertion loss.
Configuration and ordering notes
Configuration parameters include port configuration (1x2 or 2x2), coupling ratio (e.g. 50/50 splitter, 1/99 tap), and package size (dia. 2.4 x 25mm for ultra-compact boards).
Key Applications
Compact optical transceivers and SFP/QSFP modules; Passive optical networks (PON); Fiber optic sensing instruments; Laboratory photonics.
Package Drawing

Need an exact configuration?
A quotation review can begin with the application, quantity and available component information. Wavelength, optical power, fiber and termination details can be clarified with engineering.