1. Weifeng Zhang wzhan088@uottawa.ca Microwave Photonic Research Lab University of Ottawa Photonic Temporal Differentiator

2. Outline  Introduction to photonic temporal differentiator  Solution in fiber grating  Solution in waveguide grating  Conclusion 1

3. Outline  Introduction to photonic temporal differentiator  Solution in fiber grating  Solution in waveguide grating  Conclusion 2

4. Introduction to photonic temporal differentiator  What is photonic temporal differentiator? 3

5. Outline  Introduction to photonic temporal differentiator  Solution in fiber grating  Solution in waveguide grating  Conclusion 4

6. Solution in fiber grating M. Li, L. Shao, J. Albert, and J. P. Yao, "Continuously tunable photonic fractional temporal differentiator based on a tilted fiber Bragg grating," IEEE Photon. Technol. Lett., vol. 23, no. 4, pp. 251-253, Feb. 2011. 5

7. Outline  Introduction to photonic temporal differentiator  Solution in fiber grating  Solution in waveguide grating  Conclusion 6

8. Solution in waveguide grating  Using Phase-shift waveguide grating.  Design - Characterize: -Central wavelength:1550 nm -TE Polarization -Broadband 3-dB bandwidth - Corrugation width, duty cycle.  Tunability - Temperature 7 *From Wei Shi

9. Outline  Introduction to photonic temporal differentiator  Solution in fiber grating  Solution in waveguide grating  Conclusion 8

10. Conclusion  Introduction to photonic temporal differentiator  Solution in fiber grating  Solution in waveguide phase-shift grating 9

11. Thank you! 11