Grinderslev, S., "Fiber Optic Multi Channel Expanded Beam Connector," SAE Int. J. Aerosp. 5(1):128-132, 2012, doi:10.4271/2012-01-2108.
To compliment the development of the single channel small form factor size 16 optical Expanded Beam (EB) pin and socket contacts, we have explored the possibility of designing a multi-fiber high density lensed termini (HDLT). This paper describes the design efforts of an insert containing two ferrules accommodating a total of 24 fibers and mountable into a size 8 Quadrax cavity of a 38999 style connector. To take advantage of the expanded beam concept and to keep the design cost effective, the ferrules are molded with a 12 fiber v-groove array positioned behind integral lenses. Originally, the ferrules were designed for the relative benign environment of datacom applications. Therefore, in order to accommodate the broader operational environment of arospace applications which includes mechanical vibration, thermal cycling and high humidity exposure a suitable epoxy had to be identified. Design details, proposed solution, and initial test results are discussed.