Ando Yokogawa AQ-4135131 LED Unit

The Ando AQ-4135(131) is a broadband LED light source module designed for use with Ando’s modular platforms like the AQ-2140 Optical Multimeter. It provides stable optical output centered around 1310 nm, making it ideal for optical loss measurements, component testing, and fiber characterization in single-mode systems. Here’s a quick rundown: Wavelength: 1310 ± 20 nm Spectral width: ~30 nm (typical) Output power: > –10 dBm Fiber type: Single-mode 9/125 µm Connector: FC/PC (via AQ9434 adapter) Compatibility: Slides into AQ-2140 mainframe This unit is especially useful for OTDR calibration, insertion loss testing, and broadband spectral response measurements. It’s a passive, stable source—great for labs that don’t need tunability or narrow linewidth.