Optical Loss of Metal Coated Optical Fibers at Temperatures up to 800℃

摘要

Temperature band of ordinary telecommunication optical fibers is-60...85℃. The devel oping fiber optic sensors which can work at higher temperatures, required to develop metal coated optical fibers. The Purpose of the work is a researching additional optical loss of copper alloy coated optical fibers which were drawn from low hydroxyl group contamination preforms at temperatures 20...800℃. It is reached that metal coated optical fiber worked at temperature 700℃ for 7 hours, while the optical losses changed from 2 to 3 dB/km at the wavelength of λ = 1300 nm. It is not observed intensive growth of optical losses on hydroxyl groups at 800℃, which was observed in metal coated optical fiber when it was heated at 700℃.