1. Modal and Material Dispersion Daniil Y. Gladkov

2. Outline Hardware Types of Dispersion Data Transfer Function Future Project Proposals

3. Why does dispersion matter ? Understanding the effects of dispersion in optical fibers is quintessential in optical communications in order to minimize pulse spreading. Pulse compression due to negative dispersion can be used to shorten pulse duration in chirped pulse lasers

4. Hardware and setup

5. Laser Diode Power Output Profile

6. Pulsed Fiber Laser System From Wesley Hughes and Jared Green’s Presentation

7. Pulse Generator and Amplifier

8. Modal Dispersion

9. Material Dispersion

10. Anomalous Dispersion Pulse’s higher frequency have faster phase velocity than the lower frequency components Responsible for negative dispersion, pulse compression, and soliton formation http://www.falstad.com/dispersion/normal.ht ml http://www.falstad.com/dispersion/normal.ht ml

11. 150 Picosecond Pulse Generator

12. 1 Nanosecond Pulse with Amplifier

13. Femtosecond Pulse Laser

14. 1km, 2km, 3km Fiber with Femtosecond Pulse Laser Results 1 km - pulse width: 215 ps σ: 572ps 2 km - pulse width: 385 ps σ: 2.4ps 3 km - pulse width: 382 psσ: 1.62ps Results do not agree with theory

15. 20.56 km Fiber with 1 Nanosecond Pulse Laser Results

16. Multimode Fiber

17. Transfer Function

18. Input Pulse Fitting

19. Output Pulse Fitting

20. Computation of Transfer Function

21. Suggestions for Future Projects Use Optical amplifier to boost output signal Spectral profiling of pulses Anomalous Dispersion modeling Better fitting and transfer function modeling High powered laser to overcome attenuation More variations of fiber lengths Soliton formation