Light and general radiation laws. Coherence and incoherence. Emission, absorption and amplification of radiation. Units and physical constants



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Lactures

Solid-state lasers


Working body

Wavelength

Pumping source

Application

Ruby laser

694.3 nm

Pulse lamp

Holography, removal of tattoos. First introduced type of lasers (1960).

Aluminum-yttrium lasers with neodymium doping (Nd: YAG)

1,064 μm, (1,32 μm)

Pulsed lamp, laser diode

Material processing, laser far-number, laser target design, surgery, scientific research, pumping other lasers. One of the most wide-spread lasers of high power. Usually it works in a pulsed mode (nanoseconds).

Yttrium-lithium fluoride with neodymium doping (Nd: YLF)

1,047 and 1,053 microns

Pulsed lamp, laser diode

The most part is used for the rolling of titanium-sapphire lasers using the frequency doubling effect in nonlinear optics.

Laser on yttrium vanadate (YVO4) with neodymium doping (Nd: YVO)

1,064 μm

Laser diodes

The most part is used for pumping titanium-sapphire lasers, using the effect of doubling the frequency in nonlinear optics.

Neodymium glass laser (Nd: Glass)

~ 1.062 μm (Silicate glasses), ~ 1.055 μm (Phosphate glasses)

Pulsed lamp,

Lasers of extra-high power (terawatt) and energy (megajoules). Usually they work in the non-linear mode of setting the frequency from 351 nm in devices of laser melting.

Titanium-sapphire laser


650–1100 nm

Another laser

Spectroscopy, la-laser rangefinders, scientific research.

Aluminum-yttrium lasers with tulium doping (Tm: YAG)

2,0 mkm

laser diode

Laser radar

Aluminum-yttrium lasers with ytterbium doping (Yb: YAG)

1,03 mkm

Pulsed lamp, laser diode

Material processing, research of ultrashort pulses, multiphoton microscopy, laser range measures.

Aluminum-yttrium lasers with holmium doping (Ho: YAG)

2,1 mkm

laser diode

Medicine

Cerium-doped lithium-strontium (or calcium) -aluminium-fluoride laser (Ce: LiSAF, Ce: LiCAF)

~280–316 nm

Nd: YAG laser with a quadruple frequency, an excimer laser, a mercury vapor laser.

Atmospheric research, laser long-range measures, scientific developments.

Alexandrite laser with chromium alloying

Configurable in the range from 700 to 820 nm

Pulsed lamp, Laser diodes. For an uninterrupted system, an arc mercury lamp

Dermatology, laser long-range measures.

Fiber optic laser with erbium doping

1,53–1,56 mkm

laser diode

Optical amplifiers in the fiber-optic communication lines.

Лазеры на фториде кальция, легированном ураном (U:CaF2)

2,5 mkm

Pulsed lamp

The first 4-level solid-state laser, the second working type of laser (after the ruby-new Maymans laser), was cooled by liquid helium, it is not used today.




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