Gas lasers utilize a gas medium for light amplification, initiated by exciting gas atoms through electrical discharge, leading to stimulated emission of photons. They have applications in industries, medicine, scientific research, and telecommunications, with notable types being carbon dioxide, helium-neon, and argon-ion lasers. Advantages include high efficiency and spatial coherence, while drawbacks consist of high voltage requirements and potential hazards from certain gases.

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2. Gas Laser :
*The gas lasers ,are lasers that use a gas medium for the
amplification of light .
*In gas laser, the active medium that produces this light is a
gas or mixture of gases.
*Their invention in the 1960.

3. Helium-Neon Lasers
Carbon Dioxide Lasers
Argon-ion Lasers
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4. starts with the excitation of the gas
atoms. This is typically achieved
through an electrical discharge,
which boosts the atoms to a higher
energy state. The excited atoms
then decay to a lower energy state
by emitting photons. If these
photons encounter another excited
atom, they can stimulate the atom
to emit more photons of the same
energy, direction, and phase – this is
the ‘stimulated emission’
mentioned earlier. These photons
are then reflected back and forth
between mirrors, which form a
resonant cavity, amplifying the light
and producing the laser beam.

5. 01
Industry
High-power gas lasers
like the CO2 laser are
ideal for material
processing tasks such
as cutting and
welding.
02
Medicine
gas lasers are used for
a variety of
procedures including
laser surgery, skin
treatments, and eye
surgery.
03
Scientific Research
They are used in
spectroscopy,
holography, and even in
large-scale experiments
like particle
acceleration.
04
Telecommunications
Some gas lasers,
especially helium-neon
lasers, are used in fiber-
optic communication
systems.

6. 01
Industry
High-power gas lasers
like the CO2 laser are
ideal for material
processing tasks such
as cutting and
welding.
02
Medicine
gas lasers are used for
a variety of
procedures including
laser surgery, skin
treatments, and eye
surgery.
03
Scientific Research
They are used in
spectroscopy,
holography, and even in
large-scale experiments
like particle
acceleration.
04
Telecommunications
Some gas lasers,
especially helium-neon
lasers, are used in fiber-
optic communication
systems.

7. 01
Industry
High-power gas lasers
like the CO2 laser are
ideal for material
processing tasks such
as cutting and
welding.
02
Medicine
gas lasers are used for
a variety of
procedures including
laser surgery, skin
treatments, and eye
surgery.
03
Scientific Research
They are used in
spectroscopy,
holography, and even in
large-scale experiments
like particle
acceleration.
04
Telecommunications
Some gas lasers,
especially helium-neon
lasers, are used in fiber-
optic communication
systems.

8. 01
Industry
High-power gas lasers
like the CO2 laser are
ideal for material
processing tasks such
as cutting and
welding.
02
Medicine
gas lasers are used for
a variety of
procedures including
laser surgery, skin
treatments, and eye
surgery.
03
Scientific Research
They are used in
spectroscopy,
holography, and even in
large-scale experiments
like particle
acceleration.
04
Telecommunications
Some gas lasers,
especially helium-neon
lasers, are used in fiber-
optic communication
systems.

9. Advantages
• high efficiency
• ability to produce a high-
quality beam
• excellent spatial coherence
• offer a wide range of output
wavelengths
Disadvantagses
• they often require high
voltages to operate
• gas refill can be expensive
and complicated.
• some gases used in these
lasers can be hazardous.

10. Advantages
• high efficiency
• ability to produce a high-
quality beam
• excellent spatial coherence
• offer a wide range of output
wavelengths
Disadvantages
• they often require high
voltages to operate
• gas refill can be expensive
and complicated.
• some gases used in these
lasers can be hazardous.

12. Thank
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