Patent ID: 6900930
Filing Date: 2005-05-31
Classification: G02B,H01S

Abstract:
1. An optical system, comprising: an optical amplifier optically coupled to receive an optical beam, the optical amplifier to amplify the optical beam with a first non-uniform spectral response; and a gain equalization device optically coupled to the optical amplifier to receive and transmit the optical beam, the gain equalization device including an optical filter disposed in semiconductor material, the optical filter including a plurality of Bragg gratings disposed in the semiconductor material, the optical filter optically coupled to receive the optical beam to filter the optical beam with a second non-uniform spectral response, the optical beam amplified and filtered by the optical amplifier and optical filter with a resulting combined substantially uniform spectral response, wherein each of the plurality of Bragg gratings include a plurality of adjustable charge-modulated regions disposed in the semiconductor material along the optical path of each one of the plurality of Bragg gratings, the plurality of adjustable charge modulated regions provided with a plurality of insulated electrodes distributed along the optical path of each one of the plurality of Bragg gratings, the second non-uniform spectral response adjusted in response to adjustments to the adjustable charge-modulated regions alone the optical path of each one of the plurality of Bragg gratings.