lasers
DESCRIPTION
ALL ABOUT LASERSTRANSCRIPT
L A S E R S
BY: HITESH PODDAR
REG NO: 13BEC0335
W H A T I S L A S E R ?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.
L A S E R P R O P E R T I E S1. 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
P U M P I N G M E T H O D S
1.OPTICAL PUMPING
2.ELECTRICAL DISCHARE
3.INELASTIC ATOM-ATOM COLLISION
4.DIRECT CONVERSION
D I F F E R E N T L E V E L S O F P U M P I N G
1.TWO LEVEL PUMPING SCHEME
2.THREE LEVEL PUMPING SCHEME
3.FOUR LEVEL PUMPING SCHEME
T Y P E S O F L A S E R S1. 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 L A S E R S
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
A P P L I C A T I O N S O F L A S E R S
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
T H A N K U