... equationwithin a reasonable range of error. Starting with different initial guesses of ð; Þini, otheroscillating modes can be determined in a similar way. By collecting all ð0;0Þ pairs thatsatisfy ... width; (b) phase shift formed by uniformactive layer dimension but discontinuous corrugation.THE EFFECTS OF PHASE DISCONTINUITY ALONG THE DFB LASER CAVITY89phase-adjustment region and the difference ... Rð2Þ, Sð2Þare the counter-running waves propagating in sections (1) and(2), respectively. In both sections, the corrugation shape and grating depth are assumed to beequal. As a result, the...