Fiber-Optic Sonobuoy Link Development -FY 78. Fiber-Optic Components for an Optical Data Link to Interconnect the Submerged Hydrophone Package with the Surface Transmitter of a 5-km Depth Sonobuoy.

摘要

This report presents the FY78 progress in the development of fiber-optic components for an optical data link to interconnect the submerged hydrophone package with the surface transmitter of a 5-km depth sonobuoy. A Kevlar 49 strengthened, single-fiber sonobuoy cable was tested which met the operational and environmental requirements of a 5-km depth, 50 kb/s data rate, duplex sonobuoy. Optical fibers were fabricated which satisfy length and optical requirements. Test of a link consisting of an LED, a 5-km fiber, and an optical receiver showed that, when the estimated losses for the other link components such as duplexers, connectors and splices are included, there is sufficient optical power available (18dB margin) with present technology to meet deep sonobuoy link transmission requirements. (Author)