1. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. An A-O modulator with first-order feedback in Bragg regime. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

2. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. Hysteresis loop. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

3. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. Multiple/ multistable oscillations at $\tilde \beta = 2.41$β̃=2.41 and TD = 200.67 ms. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

4. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. Complete chaotic oscillation with value of $\tilde \beta = 4$β̃=4. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

5. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. High frequency chaos of 6.3 s. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

6. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. High frequency chaos. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

7. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. The chaos frequency versus 1/TD and linear frequency. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

8. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. (a) A bistable and chaotic profile for $\tilde \beta = 2.41$β̃=2.41. (b) Time profile of I 1 in the upper monostable region. (c) Time profile of I 1 just past the bistable loop. (d) Time profile of I 1 within the bistable loop. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

9. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. (a) The frequency spectrum of a DSB signal with a 10 kHz carrier and 2.5 kHz triangular wave. (b) Modulated chaos waveform with an encrypted triangular wave. (c) The spectrum of the modulated chaotic signal. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

10. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. (a) A modulated chaos wave a sinc function envelope. (b) Modulated sinc wave with $\tilde \beta = 4$β̃=4 and $\hat \alpha _0 = 2$α ̂ 0=2. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

11. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. (a) Schematic of the simulation setup showing components used in the numerical analysis of HAOF at the transmitter end. (b) Schematic of the simulation setup showing heterodyne components used in the numerical analysis of HAOF at the receiver input. ©(c) Schematic of the simulation setup showing amplifier, filter, and phase inverter modules at the receiver. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

12. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. Original and recovered sinc signal with matched parameters. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

13. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. Original and recovered triangular signal with matched parameters. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

14. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. Dependence of chaos amplitude on $\tilde \beta$β̃. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

15. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. Dependence of chaos amplitude on $\hat \alpha _0$α ̂ 0. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

16. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. Original and recovered triangle wave with $\tilde \beta$β̃ mismatch. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

17. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. Original and recovered triangle wave with TD mismatch. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106

18. Date of download: 5/31/2016 Copyright © 2016 SPIE. All rights reserved. Original and recovered triangle wave with $\hat \alpha _0$α ̂ 0 mismatch. Figure Legend: From: Examination of chaotic signal encryption and recovery for secure communication using hybrid acousto-optic feedback Opt. Eng. 2011;50(5):055002-055002-14. doi:10.1117/1.3574106