Abstract: Dynamic behavior of structures subject to vibrations is monitored with light coupled into a single multi-mode optical fiber positioned within or on the structure. Vibration caused strain or deflections in the structure are detected by interference light signal intensity variations caused by differential phase changes in the transmission modes. These intensity variations are optically detected to provide an electrical output. Actuators may be positioned at the vibration nodes of the structure and energized by signals derived from the electrical output signals to suppress the vibrations.

Abstract: A connector assembly for efficiently coupling optical data from a fiber optic transmission line terminal to an electro-optic conversion device which may be associated with, for example, a hybrid electronics circuit substrate contained within a hermetically sealed enclosure or hybrid circuit package is disclosed. The connector is characterized by a unitary assembly of a generally tubular connector body adapted to removably receive and align a fiber optic terminal with an aperture therein, a transparent faceplate aligned with the aperture and hermetically sealed in the body, and an electro-optic conversion device mounted on the body in alignment with the aperture. The connector assembly may be tested prior to being hermetically sealed to the hybrid circuit package whereafter the conversion device may be connected to the hybrid circuit substrate and the entire hybrid circuit package hermetically sealed.