Patent ID: 7421200

Claim:
An apparatus, comprising: an optical splitter disposed in a semiconductor material, wherein the optical splitter splits an optical beam having a first wavelength into first and second portions; first and second optical waveguides disposed in the semiconductor material and optically coupled to the optical splitter such that the first and second portions of the optical beam are to be directed through the first and second optical waveguides, respectively, the first optical waveguide to be optically coupled to receive a pump optical beam having a pump wavelength and a pump power level to amplify and phase shift the first portion of the optical beam of the first wavelength in the first optical waveguide; a diode structure disposed in the first optical waveguide, the diode structure to be selectively biased to sweep out free carriers from the first optical waveguide generated in response to two photon absorption in the optical waveguide; and an optical coupler disposed in the semiconductor material and optically coupled to the first and second optical waxeguides to combine the first and second portions of the optical beam.