| 摘要 |
<p>Repeater amplifier in which a diode laser (20) or LED is coupled to a fibre link to activate the latter and provide positive gain, the link comprising a length (12) of the fibre optic transmission line doped with Neodymium or Erbium. An improved transmission line is described in which the line is effectively formed as a continuous repeater amplifier by doping the fibre optic line with Neodymium or Erbium to an amount just sufficient to cancel out line losses for optical signals transmitted therealong. Typical operaing wavelengths for the diode laser are 700 - 900nm. An advantage has been found by employing a carrier for the light signals of 1.318 microns for Neodymium doping and 1.54 microns for Erbium doping.</p> |
