A MAGIC laser for WDM applications

The authors report the realization of a new form of semiconductor laser that has excellent potential for use as a multiwavelength source in multiwavelength networks. The MAGIC (multi-stripe array grating integrated cavity) laser is a single-chip injection laser that is capable of providing addressable single- and multiple-wavelength laser radiation from a single-output port at precisely predetermined wavelengths over a broad spectral range. The monolithic laser source is expected to be robust and the fabrication technology employed suggests high yield and low cost of manufacture. The laser comprises an array of active stripes, monolithically integrated with a planar waveguide that contains a dispersive diffraction grating. This wavelength dispersing grating provides the optical feedback required for wavelength-specific operation.