A network developer needed a compact, fast variable differential group delay generator that could withstand constant switching and had to fit between existing components in their chassis.

General Photonics successfully packaged a DGD generator in a very small stainless steel chassis. The circuitry utilized magneto-optic crystals for precise control, a technique documented in papers published by General Photonics. This custom module constituted a critical part of the customer’s optical PMD compensation system.