Phase-shift distributed-feedback semiconductor laser
AssigneeNippon Telegraph and Telephone Corporation
InventorsAkira Sugimura, Tatsuya Kimura
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Abstract
A phase-shift distributed-feedback semiconductor laser includes an electrode for injecting a current to the entire area of the semiconductor laser. The laser also includes portions each for shifting an optical phase by a 1/4 wavelength at at least three locations, the number of which is an odd number. These portions are formed in a light propagation direction of the phase-shift distributed-feedback semiconductor laser structure.
Claims7
A phase-shift distributed-feedback semiconductor laser including at least two electrodes for injecting a current to an entire area of said semiconductor laser, comprising portions, each for shifting an optical phase by a 1/4 wavelength at least three locations, the number of which is an odd number, said portions being formed inside a laser cavity in an optical path of a phase shift distributed, feedback semiconductor laser structure in a light propagation direction of the phase-shift distributed-feedback semiconductor laser structure.
Dependencies are inferred from the claim text.