1. Light Amplification by Stimulated Emission of Radiation

2. Ruby Laser, by T. H. Maiman, 1960

3. National Ignition Facility, Lawrence Livermore Lab 1.8MJ, 192 Lasers 10 6 J fired every second 10 6 W = 10,000 100W lightbulbs Enough to supply 3000 households

4. Nova Target Chamber (LBNL) - Laser Fusion

7. 1 0 Compact Disc (CD) Reader

10. E h absorptionemissionStimulated emission

11. Mirror Population inversion

12. Mirror Spontaneous emission

13. Mirror Stimulated emission

14. Mirror Feed-back by the cavity

15. Mirror Stimulated emission

16. Mirror Feed-back by the cavity

17. Mirror Laser beam After several round trips… Photons with: - same energy : Monochromatic - same direction of propagation : Spatial coherence - all in synchrony: Temporal coherence

22. Dye molecules: strong absorption & emission

23. To make a dye lase Pump: UV laser Cylinder Lens Partial (4%) reflector

24. Off to the Lab!