A through-the-backplane, circuit pack optical connector, utilizing a novel alignment mechani3m, is described. Up to 13 fibers can be interconnected in a space of 0.5" x 0.6" x 2.26". Average loss is 0.53 dB with 50/125 fiber. Laboratory tests with single mode fiber (8.3/125) in a modified connector have shown an average loss of about 0.7dB. All measurements were made without index matching material.