Figure 2.

(a) Normalized output spectra of CAISWG (black solid line with squares), QISWG (red solid line with circles), ARWG (green solid line with triangles) and SRWG (blue solid line with stars). (b) Full widths at half-maximum values and their emission peak intensities of CAISWG (black and blue squares respectively) and SRWG (black and blue circles respectively), as a function of the incident laser fluence. (c) Dependence of the emission intensity at λ_ASE on the length of the unpumped region between the edge of the excitation stripe and the substrate edge of ARWGs (black triangles) and SRWGs (red circles). Black solid line and red solid line represent a linear fit of each data set.