ALL ABOUT LASERS

2. A laser is a device that emits light through a process of optical
amplification based on the stimulated emission of electromagnetic
radiation. The term "laser" originated as an acronmy for Light
Amplification by Stimulated Emission of Radiation.
LASER PROPERTIES
1. M O N O C H R O M A T I C
2. C O H E R E N T
3. H I G H I N T E N S I T Y
4. D I R E C T I O N A L I T Y

3. 1.OPTICAL PUMPING
2.ELECTRICAL DISCHARE
3.INELASTIC ATOM-ATOM COLLISION
4.DIRECT CONVERSION

4. 1.TWO LEVEL PUMPING SCHEME
2.THREE LEVEL PUMPING SCHEME
3.FOUR LEVEL PUMPING SCHEME

8. 1. R U B Y L A S E R S
2. H E – N E L A S E R S
3. N D – Y A G L A S E R S
4. C 0 2
LASERS
5. E X C I M E R L A S E R
6. D Y E L A S E R S
7. C H E M I C A L L A S E R S
8. F R E E E L E C T R O N L A S E R S

12. 1. U S E D F O R W E L D I N G
2. D R I L L I N G
3. C U T T I N G
4. O P T I C A L D I S K S Y S T E M
5. S E C U R I T Y P U R P O S E S
6. O P T I C A L D A T A S T O R A G E
7. I N M E D I C A T I O N F I E L D S