Transcript Lasers, Yeah They Look Cool, But How Do They Work?

Lasers, Yeah They Look
Cool, But How Do They
Work?
Brought To You Buy:
STEVE KESSLER
&
DANNY GOEPFERT
WHY IS IT CALLED A LASER?
• Light
• Amplification by
• Stimulated
• Emission of
• Radiation
The Parts Of A Laser
• There are 3 main
Parts:
1 Energy Source
2 Active Medium
3 Optical Cavity
The Laser Light Process
• The process of creating light can be broken
down into four stages. The next four slides will
show and explain to you how a laser works!
Stage 1
High-voltage electricity causes the quartz flash tube to
emit an intense burst of light, exciting some of the
atoms in the ruby crystal to higher energy levels.
Stage 2
At a specific energy level, some atoms emit particles of light
called photons. At first the photons are emitted in all
directions. Photons from one atom stimulate emission of
photons from other atoms and the light intensity is rapidly
amplified.
Stage 3
Mirrors at each end reflect the photons back
and forth, continuing this process of
stimulated emission and amplification.
Stage 4
The photons leave through the partially silvered
mirror at one end. This is laser light.
Types Of Lasers
•
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•
Solid State Lasers
Gas Lasers
Liquid State Lasers
Semiconductor Lasers
Chemical Lasers
Solid State Lasers
Gas Lasers
Liquid Lasers
Sub-conducting Lasers
Chemical Lasers