The MDL-003 family of motorized variable optical delay lines are the smallest delay lines in the MDL series of products, with a total volume of less than 2 cubic inches. The standard device has a delay range of 100 ps; however an internal mirror can be installed to double pass the light, thereby doubling the delay range.

The device uses a stepper motor and dual position sensors for precise control.

A small controller board is available as an option.