Patent ID: 6522461
Filing Date: 2003-02-18
Classification: H01S,H04B

Abstract:
An apparatus for optically preamplifying a signal being input to a receiving device, comprising:an optical amplifier optically coupled to an input port of the receiving device, said optical amplifier optically amplifying an input signal and outputting the optically amplified signal to the receiving device; a pump optically coupled to said optical amplifier, said pump injecting pumping light into said optical amplifier to provide the optical amplification of the input signal; and a controller operatively connected to said pump and to the receiving device, said controller receiving power measurements from the receiving device indicative of the amplified signal's optical power; said controller commanding a pump power level output by said pump to perform gain control according to the power measurements received from the receiving device; and said controller setting the commanded pump power level of said pump to a home gain value upon an occurrence of a loss of signal event.