Patent ID: 6621627
Filing Date: 2003-09-16
Classification: H01S

Abstract:
A device, comprising:an input port carrying input WDM channels; first and second optical paths respectively having a first optical amplifier to amplify optical energy in a first spectral range and a second optical amplifier to amplify optical energy in a second spectral range; and first and second sampled Bragg gratings, each configured to produce a plurality of discrete Bragg reflection bands at different frequencies of a portion of said input WDM channels to reflect optical energy in said Bragg reflection bands while transmitting optical energy at other frequencies, said first sampled Bragg grating coupled to said input port to split said input WDM channels into a first group of WDM channels in said first spectral range in said first optical path and a second group of WDM channels in said second spectral range in said second optical path, said second sampled Bragg grating coupled to said first and said second optical paths to combine said first and said second groups of WDM channels after amplification by said first and said second optical amplifiers, respectively, to produce amplified output WDM channels.