A used to produce laser. Depending upon the medium

A wide range of laser is exists and its usage
depends upon the field.  Laser is
categorized in main modules on the foundation of medium used to produce laser.
Depending upon the medium the range and wavelength also vary.

Main categories of laser are:

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1.      GAS  laser

It is further divided into sub
categories that are:

·        
Helium neon laser:

Helium
is a noble gas with wave length is 632.8 nm and preferably used in bar code
scanning and in spectroscopy

·        
Argon laser:

This
type of laser has wavelengths values 454.6 nm, 514.5 nm, 514.5 nm. It has given
good results in retinal photography. Moreover it is the best for pumping the other
lasers.

·        
Krypton laser:

This
laser has range of values from 416nm to 799.3 nm.it is found very helpful in
scientific research and you can have white light when you combine it with Argon.

·        
Nitrogen laser:

It
has wavelength 337.1nm. You can easily get it from electrical discharge. It is
mostly used in measurement of environmental pollution.

·        
Carbon dioxide laser:

This
laser has values of wavelengths 2.6, 4.8 or 8.3 nm. Its application is found I  in welding and spectroscopy.

2.      Chemical
lase:

·        
Deuterium fluoride laser

The
maximum wavelength is 4.2 ?m and
its pumping source is chemical reactions and applicable in military areas
mostly.

·        
Chemical oxygen iodine laser:

It
is used in military, scientific and material research and of 1.315 ?m .

3.      Dye
laser:

Dye laser have broadly used in
medical to remove birthmarks. Also use in categorized isotopes of atoms, in
medicines and spectroscopy.

4.      Solid
state laser

·        
Ruby laser:

It
is emerged from flash lamp and have wavelength of 694.3nm. mostly used in
tattoo removal and holography.

·        
For dental treatment Er:YAG laser is
used with 1.0470and 1.053?m
wavelength.

·        
For the
production of Nano powders a laser known as NdCrYAD is preferable.

 

 

 

5.      Semiconductor
laser

Some people also called it diode
laser. Gadgets use in this technology is small and consume low power.

6.      Metal
vapors laser

·        
HeCd laser:

325nm
or 441.563 nm and used in printing scientific work and enhance flouricnce.

·        
HeHg laser:

Helium
mercury laser is useful in construction of amateur laser and scientific areas.

·        
In scientific scenario other important
laser are Helium silver, strontium vapors, neon copper and some other
combination of noble gases with metals.

 

 

7.      Some
other types of laser

·        
Free election laser is used in
atmosphere and material science.

·        
Gas dynamic laser has the impact in
heavy industry.

·        
Nuclear pump laser are emitted to apply
in weapons and research.

 

These
are the kinds of laser sorted based on medium they can be gathered in certain
kind based on different factor like the source that discharge them.

Some type of laser
are emitted continuously while some are single pulsed. Some lasers are
repeating in nature and few of them are mode protected. So on the basis of the
duration the have different ranges of power as well.

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