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

• Solid State Lasers

• Gas Lasers

• Liquid State Lasers

• Semiconductor Lasers

• Chemical Lasers

Solid State Lasers

Gas Lasers

Liquid Lasers

Sub-conducting Lasers

Chemical Lasers