1. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Theoretical dispersion curves for 1-mm and 2-mm thick aluminum plates (on the vertical axis the time of flight [TOF] is shown instead of the group velocity): (a) antisymmetric modes and (b) symmetric modes. Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

2. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Transducer configuration used as transmitter and receiver: two transducers with opposite polarizations are mounted on two surfaces of the plate facing each other. 37 Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

3. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Schematic of the experimental setup: a double-ended setup adapted for two transducers on each side. The excitation signal is switched between in-phase and out-of-phase signals by the polarity selector. The signals of the two receiving transducers are separately recorded by two transient recorders. Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

4. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. The sample geometry: plan and elevation views are shown in (a) and (b). Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

5. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Intrinsic mode functions (IMFs) calculated using HHT for the 2-mm thick laminated aluminum plate signal. Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

6. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Hilbert–Huang transform (HHT) plots for the antisymmetric mode: (a) laminated plate (2-mm thick), (b) partially delaminated plate (2- mm thick), and (c) fully delaminated plate (1-mm thick). Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

7. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Hilbert–Huang transform plots for symmetric mode S0: (a) laminated plate, (b) partially delaminated plate, and (c) fully delaminated plate. Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

8. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Hilbert–Huang transform plots for symmetric mode S2: (a) laminated plate, (b) partially delaminated plate, and (c) fully delaminated plate. Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

9. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Unwrapped phase for antisymmetric (A0) mode calculated using HHT for the laminated, partially delaminated, and fully delaminated aluminum plates. Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

10. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Unwrapped phase for antisymmetric (A0) mode for various degrees of delamination: intact laminated (or no delamination), partially delaminated, and fully delaminated plates; results are presented for the first arrival: (a) at time 73±1 μs and (b) later arrival at 155±1 μs. Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

11. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Unwrapped phase for symmetric (S0) mode calculated using HHT for intact laminated plate, partially delaminated plate, and fully delaminated plate. Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

12. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Unwrapped phase for symmetric (S2) mode calculated using HHT for intact laminated plate, partially delaminated plate, and fully delaminated plate. Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006

13. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Group velocity dispersion curves for antisymmetric modes (continuous and dashed lines) and positions of the dominant peaks in the Hilbert–Huang transform plots of Fig. 6 are shown (by dotted ellipses): (a) intact laminated plate, (b) partially delaminated plate, and (c) fully delaminated plate. Figure Legend: From: Detection and quantification of delamination in laminated plates from the phase of appropriate guided wave modes Opt. Eng. 2015;55(1):011006. doi:10.1117/1.OE.55.1.011006