Patents Examined by Deandra M. Hughs
  • Optical amplifier with automatic level control and automatic gain control
    Patent number: 6452722
    Abstract: Regulated optical amplifiers for wavelength-division multiplex signal transmission that include a first control device for regulating the gain and a second, dominating control device having a significantly slower control behavior for regulating the output power level in conformity with a supplied rated power value. Both rapid level changes as well as slow changes in attenuation of the transmission path can be leveled with a transmission path utilizing these amplifiers.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: September 17, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventors: Peter Krummrich, Claus-Jörg Weiske, Martin Schreiblehner, Wolgang Mader