Exploring laser systems - Zewail city

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By

• Anas Mohamed

• Mohamed Elmallah

• Anas Mohamed

• Mohamed Elmallah

• Amr Mousa

Contents

1

Main components of laser2

Types of Laser3

Laser Applications4

The concept of Laser

Dr Zewail Nobel Prize

L

A

S

E

R

Light

amplification

What is LASER ??

by

stimulated

emissionof

radiation

Laser LightOrdinary Light

The Mechanism of Laser

The Mechanism of Laser

Electrons transit between energy levels by

Spontaneous

absorption

Spontaneous

emissions

Stimulated

emissions

Laser is basically

produced by

Stimulated

Emission

Components of Laser

MirrorsActive

MediumFlashLight

Lasers mainly consist of three major Parts

Company Logo

Solid-state lasers

Have lasing material distributed in a solid matrix

Gas lasers

Excimer lasers

Use reactive gases, such as

chlorine and fluorine, mixed

with inert gases such as argon,

krypton or xenon

Dye lasers

In these lasers the lasing medium is made-up of one or a

mixture of gases or vapors. The most common of all gas

lasers is the helium-neon (He-Ne) laser

Semiconductor lasers

Sometimes called diode lasers, are not

solid-state lasers. These electronic devices

are generally very small and use low power

LASIK surgery uses a laser light in

order to correct near or far

sightedness

Eye surgery

Skin Care

• Removing inner layers of skin

• Hair removal

• Freckles removal

• Skin whitening

Fiber Optics

Fiber optics offer faster speeds of Internet connectivity as

compared to cable internet and DSL. Fiber optic cables

use signals transmitted by beams of laser light and suffer

from less signal degradation than copper cables.

kidney stone treatment

In medicine

dentistry

hair

removal

In the military

Rockets guidance Radar Systems

In electronics

CDs & DVDs

LASER printers

HologramsBarcode scanners

In the Industry

Cutting Heating materials

Damanhour

February 26, 1946

The Femtosecond is

1

1,000,000,000,000,000

Millionth Billionth

of one second

7 Times in one second

V=300,000 Km/sec

in one femtosecond !!

Dr.Ahmed Zewail

California Institute of Technology

1999 Nobel Prize in Chemistry

The World's Fastest Camera

4D Electron Microscopy

The Era of Laser-Selective Chemistry

1. "Press Release: The 1999 Nobel Prize in Chemistry".

Nobelprize.org. Retrieved 12 February 2011.

2. http://whatis.techtarget.com/definition/laser

3. http://www.phy.cuhk.edu.hk/phyworld/articles/laser/laser_e.html

4. The Birth of Fiber Optics. inventors.about.com

5. "laser". Reference.com. Retrieved May 15, 2008.

6. Prized Science 2011 - Episode 1 - Designing the World's

Fastest Camera 2

7. How do lasers work- - Naked Science Scrapbook - YouTube

References

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