Showing papers on "Optical Carrier transmission rates published in 1973"
Patent•
15 Oct 1973
TL;DR: In this article, a closed-loop optical communications system with a carbon dioxide laser beam is described, where the optical carrier is followed by free-hole absorption caused by application of an external applied field which results in an electronhole plasma being produced in the block.
Abstract: A closed-loop optical communications system which transmits a laser-originated optical carrier from a sending station. The optical carrier, preferably a carbon dioxide laser beam, is successively directed through a plurality of transceivers back to a receiver associated with the laser sending station. Each transceiver includes a block of semiconductor material, preferably p-type or n-type InSb, which is maintained at 77* K. Modulation on the optical carrier is detected by generation of a plasma in each transceiver block by multiphoton absorption. Only a very small fraction of the optical carrier (i.e., 2%) is absorbed in each block. The carrier is in turn modulated at each transceiver by free-hole absorption caused by application of an external applied field which results in an electron-hole plasma being produced in the block. A time-multiplexed system allows communication among the transceivers and the sending station and receiver.
9 citations