Inverse scattering approach to multiwavelength Fabry-Pérot laser design
O'Brien, S. and Osborne, S. and Buckley, K. and Fehse, R. and Amann, A. and O'Reilly, E.P. and Barry, Liam P. and Anandarajah, Prince M. and Patchell, J. and O'Gorman, J. (2006) Inverse scattering approach to multiwavelength Fabry-Pérot laser design. Physical Review A, 74 (6). ISSN 1050-2947
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A class of multiwavelength Fabry-Pérot lasers is introduced where the spectrum is tailored through a patterning of the cavity effective index. The cavity geometry is obtained using an inverse scattering approach and can be designed such that the spacing of discrete Fabry-Pérot lasing modes is limited only by the bandwidth of the inverted gain medium. A specific two-color semiconductor laser with a mode spacing in the THz region is designed, and measurements are presented demonstrating the simultaneous oscillation of the two wavelengths. The nonperiodic effective index profile of the particular two-color device considered is shown to be related to a Moiré or superstructure grating.
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