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Copy of Lasers

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Kim Jin Wook

on 9 January 2014

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Transcript of Copy of Lasers

1. Outline
2. Principles of Lasers
3. Application of Lasers
4. Conclusion
5. References
How Lasers Work
Text References

A Laser light can be distinguished by its properties compared to other light emitting sources.

How the laser functions in terms of theory and the involvement of the components.

The application of lasers in three areas, providing examples of improvements of improvement in existing principles and new innovations.
Figure 1 Characteristics of a Laser
Properties of Lasers
Lasers can be distinguished through their properties including:


shown in Figure 1.

Coherency is a term that is use to describe the identical phases of laser light.
A monochromatic light is comprised of a single colour or wavelength.
A light traveling in one singular direction or a concentrated beam is a property known as collimation.
1st Stage: Pumping
Where power is supplied to an exterior light source, such as a flash lamp, which conceals the solid element in its light. This light is then absorbed by the lasing medium (Hecht 2008, p.6; McComb 1988 p.3).

A pumping device is used to raise the atoms to a high-energy state from the ground state by transferring light energy to the atoms.
2nd Stage: Stimulation
Photons collide with the high-energy. This forms new photons that are the exact duplication of the initial photon, which were disassociated during the impact of collision (McComb 1988, p.2; Csele 2004, p.91; Renk 2012, p.226).

This chain reaction effect of reproducing the original photon is called, stimulation emission of radiation (Csele 2004, p.91).
3rd Stage: Decaying State
As a result, the numbers of photons increase, while the atoms energy levels gradually reduce.
4th Stage: Light Amplification
The solid will absorb specific wavelengths of the light spectrum emanated from the light source, empowered by the light amplification process. McComb (1988, p.2) explains, light amplification is a process when photons are absorbed by the lasing medium, which then travels inside the optical resonant cavity reflecting from the mirrors.

Consequently the photons collide with excited high-energy atoms. As a result, this releases more photons, constituting light amplification.
5th Stage: Emission of laser beam
Finally the laser emits a light beam, in the case of the ruby laser, a red beam is emitted (McComb 1988, p.3).
Power Supply
Pumping Device
Lasing medium
Resonant Optical Cavity
Application: Industries
Figure6: Construction laser (LASER SONICS Leica Rugby)
Application: Medicine
Figure10: Stryker endoscopy (Scott blog stryker endoscopy, 2013)
Application: Computers
Figure 5: A Complete Computer In A 160mm Ball (Wikimedia Commons Bijoy Keyboard image, 2012)

Application of Lasers
Developments and Innovations
Giecy, Ziming, Wenzhen and Ilham
Definition of a Laser
Figure 2: Basic components of lasers. (Adapted from Osha, 2013)
(Hecht 2008, p.10; McComb 1988, p.3; Hitz, Ewing and Hecht 2001, p.2)
(Csele 2004, p.85)
Csele M. 2004,
Fundamentals of Light Sources and Lasers,
John Wiley and Sons, Inc., United States of America.

Diels, J.C and Arissian, L. 2011,
Lasers: The Power and Precision of the Light,
Wiley-VCH, Verlag GmbH & Co. KGaA, Germany.

Gonzales, R. 2002
"Laser Application In Manufacturing, Medicine, and Communications"
, Techdirections,
pp. 24-25.

Hecht, J. 2008
, Understanding Lasers: An Entry-level Guide,
3rd Hoboken, New Jersey.

Hitz, B., Ewing, J.J. and Hecht, J. 2001,
Introduction to Laser Technology,
3rd IEEE, Press, Hoboken, New Jersey.

McComb, G. 1988,
The Laser Cookbook: 88 Practical Projects,
TAB Books, Mcaraw Hill, Inc., United States of America.
(Hecht 2008, p.13)
(Csele 2004, p.86)
Figure 4: Simple Keyboard ( TechandFacts Computer Engineering, 2013)

Figure11: Cutting vital bone by laser (CO-ME Systems face Morphology applicator, 2009)
Figure12: Scalpel (Cadenceinc Knife Assemblies )
Laser be used in keyboard
Traditional keyboard
Figure8: Laser cutters(Sino Concept Lower Tooling Costs,2011)

Figure7: Diamond Cutting Tools ( Flat Seg MADE-IN-CHINA.COM)
Figure9: Construction Traditional (W. J. Hale Construction, Inc)
Laser construction and cutting

tools improve Industries

Figure 3: The five process in generating laser light. (Adapted from McComb 1988, p.4)
Adapted from Csele 2004, p.85
Image References
Csele M. 2004,
Fundamentals of Light Sources and Lasers
John Wiley and Sons, Inc., United States of America.
McComb, G. 1988,
The Laser Cookbook: 88 Practical Projects,
TAB Books, Mcaraw Hill, Inc., United States of America.
OshaOccupational Safety and Health Administration 2010, Introduction to Laser Safety, OSHA, Washington DC,
available at: <https://www.osha.gov/dte/library/radiation/laser_rmcoeh_20021007/slide3.html>, view on 21.12.13
Laser technology has advance the construction industries that can be divided into two ways. First, is the new innovations that lasers has enabled to create such as the laser level. The second advance is the improvement of existing principles such as material processing.
Provides power with a potential charge up to 10 thousand volts and more ( McComb 1988, p. 5).
Sinoconcept, “Access to sophisticated technologies and experienced engineers”, accessed 05/01/2014,

TechandFacts Computer Engineering, 2013, “TechandFacts Computer Engineering”, accessed 05/01/2014,

Wikimedia commons, 2012, “File:Bijoy Keyboard image.jpg “, accessed 05/01/2014, http://commons.wikimedia.org/wiki

W.J. Hale Construction, Inc, accessed 05/01/2014,

is responsible for ejecting the power supply to the lasing medium to generate greater amount of high- energy level atom (Csele 2004, p.88)
Refers to the mirrors that are located both side of the lasing medium (one full mirror and half mirror) ( McComb 1988, p.5).
The material used in the laser to provide light emission ( McComb 1988, p. 5 and Hecht 2008, p. 7.)
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