B.S.T.J. brief: Optical waveguides with very low losses

Low-loss optical fibers may be necessary for economical optical tranamieeion sy.stema. We have developed fibers that exhibit losses of lese than 2 dB/km. at 1.06 µm. The fibers were made by a chemical vapor deposition (CVD) technique that employs simultaneous reaction and fwdon to a clear glassy core material.