Citation:O’Brien, S., Osborne, S., Buckley, K., Fehse, R., Amann, A., O’Reilly, E. P., Barry, L. P., Anandarajah, P., Patchell, J. and O’Gorman, J. (2006) 'Inverse scattering approach to multiwavelength Fabry-Perot laser design', Physical Review A, 74(6), 063814 (5pp). doi: 10.1103/PhysRevA.74.063814
A class of multiwavelength Fabry-Perot 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-Perot 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 Moire or superstructure grating.
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