09:05-09:55 am, Wednesday, September 22, 2010

1. Resonant cavities Gain Threshold population to achieve oscillation Achieving resonance Longitudinal modes Coherence Pulse length / resolution tradeoff Laser pulse characteristics CHEM 8152: Analytical Spectroscopy Smith 1111, University of Minnesota 09:05-09:55 am, Wednesday, September 22, 2010

2. 50th Anniversary:Discovery of the Laser T. Ditmire, American Scientist, 98, 394-401 (2010)

3. Pumping (Absorption) & Stimulated Emission T. Ditmire, American Scientist, 98, 394-401 (2010)

4. Stimulated Emission

5. CW vs. Mode-Locked Laser Mode-Locked = fixed phase T. Ditmire, American Scientist, 98, 394-401 (2010)

6. Mode-Locked Laser Characteristics

7. Pulse Length / Resolution Limits • Uncertainty principle lower limit: ΔtΔν ~ 5000 fs cm-1

8. Chirped Pulse Amplification T. Ditmire, American Scientist, 98, 394-401 (2010)

9. Femtosecond Stimulated Raman Spectroscopy Kukura, P.; McCamant, D. W.; Mathies, R. A., Annu. Rev. Phys. Chem., 2007, 58, 461-488.

10. Pulse Length / Resolution Limits Kukura, P., D.W. McCamant, and R.A. Mathies, Femtosecond stimulated Raman spectroscopy. Annu. Rev. Phys. Chem., 2007. 58: p. 461-488. Uncertainty principle lower limit: ΔtΔν ~ 5000 fs cm-1 FSRS is capable of attaining ΔtΔν ~ 500 fs cm-1 Possible because observed variables are decoupled

11. Kukura, P., D.W. McCamant, and R.A. Mathies, Femtosecond stimulated Raman spectroscopy. Annu. Rev. Phys. Chem., 2007. 58: p. 461-488.

12. Kukura, P., D.W. McCamant, and R.A. Mathies, Femtosecond stimulated Raman spectroscopy. Annu. Rev. Phys. Chem., 2007. 58: p. 461-488.

13. Pulse Characteristics

14. Gain Medium Pump Laser Ip Is> Is(0) w Probe Laser Is(0) <Ip w-ws Femtosecond Stimulated Raman Spectroscopy Kukura, P.; McCamant, D. W.; Mathies, R. A., Annu. Rev. Phys. Chem., 2007, 58, 461-488.

15. FSRS Apparatus 35 fs, 800 nm, 10 mJ, 250 KHz

16. Accessible Spectral Window, Time Resolution, and Molecular Modes Probed by Vibrational Spectroscopic Techniques Used To Monitor Structural Dynamics Kukura, P., D.W. McCamant, and R.A. Mathies, Femtosecond stimulated Raman spectroscopy. Annu. Rev. Phys. Chem., 2007. 58: p. 461-488.