%0 Electronic Article %A M.P. Gold %A A.H. Hartog %K semiconductor laser source %K optical time-domain reflectometer %K 1.3 micron wavelength %K optical receiver %K optical testing %K OTDR %K single-mode fibres %K p-i-n diode detector %K transimpedance amplifier %X A single-mode optical time-domain reflectometer (OTDR) operating at a wavelength of 1.3 μm with a dynamic range in excess of 26 dB one way is reported. The equipment incorporates a semiconductor laser source and a new low-noise optical receiver design utilising a PIN diode detector and a transimpedance amplifier. %@ 0013-5194 %T Ultra-long-range OTDR in single-mode fibres at 1.3 μm %B Electronics Letters %D June 1983 %V 19 %N 13 %P 463-464 %I Institution of Engineering and Technology %U https://digital-library.theiet.org/;jsessionid=3qj55ar9qjk7b.x-iet-live-01content/journals/10.1049/el_19830315 %G EN