Scalable coarse WDM transceiver modules for satellite applications

Increasingly demanding requirements on the data communication networks in satellites is pushing the limits of electrical interconnect capabilities. Optical interconnects have been slow to be adopted in this application space due to the harsh environmental conditions and stringent qualification requirements that preclude the use of commercial optical transceivers. In particular, radiation, extreme temperature cycling, and high temperatures in vacuum are not compatible with many of the materials and packaging techniques used in commercial transceivers. The electronics in commercial optical transceivers are also prone to single event effects (SEE) from radiation exposure, including upset and latch-up. Commercial optical transceivers also lack sufficient self test and monitoring capabilities, as well as end-of-life (EOL) link power margin for satellite applications where replacing failed parts in not an option. In addition, satellite applications place a much higher value on reducing SWaP (especially power) and fiber count than commercial applications. OptiComp is developing coarse WDM optical transceivers specifically designed for satellite applications. The transceiver will be housed in a hermetically sealed ceramic column grid array (CGA) package to facilitate operation under vacuum conditions and over a large number of temperature cycles. The package interior features two shelves: one for an optoelectronic board hosting the optical transmitter and receiver subassemblies and one for an electronics board for a digital diagnostic monitoring interface (DDMI).