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What are the types of pumping in lasers?
A laser emits a beam of energy in the form of light. But to get energy out of a laser, we have to put some in. Depending on the type of laser, there are different ways to do this. What is important here is that the energy put into the lasing medium, the energy that is pumped into that medium to stimulate it, to excite it (the actual term), to induce it to lase, is supplied by an outside source, by a pump appropriate to that type of laser. So the pump, that thing outside the medium that stimulates it to induce it into lasing, is pumping when it is exciting the medium. Hope this was, um, coherent....
Why 4 level laser system is better than 3 level laser system?
Three and Four Level Laser SchemesWe have said that the two level scheme is not generally feasible for laser action. There are two main reasons for this. The first reason is that the energy being used to pump the particles into the upper laser state has an equal probability of stimulating them back down. Thus it is not possible to get nore than half of the particles into the excited state. The three level scheme gets around this problem by first exciting the particles to an excited state higher in energy than the upper laser state.(See figure below) The particles then quickly decay down into the upper laser state. It is important for the pumped state to have a short lifetime for spontaneous emission compared to the upper laser state. The upper laser state should have as long a lifetime (for spontaneous emission) as possible, so that the particles live long enough to be stimulated and thus contribute to the gain.The four level laser scheme goes one step further and also depopulates the lower laser level by a fast decay process.(see figure below) This greatly decreases the loss of laser photons (v2) by stimulated absorption processes since the particles in the lower laser level have a short life-time for spontaneous emission.
Why is it difficult to achieve LASER action at higher frequency range like x-rays?
It is difficult to achieve LASER action at higher frequency ranges like x-rays because the transition energies between energy levels of atoms or molecules are very high in that range. This requires very high input energies to populate the higher energy levels and achieve population inversion, making it technically challenging to create a suitable gain medium for x-ray laser operation. Additionally, x-rays are more likely to be absorbed or scattered by the medium, leading to difficulties in maintaining the coherence required for laser action.
Difference between he-ne laser and ruby laser?
1.he-ne laser is gaseous state. Ruby is solid state laser. 2.he-ne laser requires electrical pumping. ruby laser requires optical pumping. 3.he-ne laser has 4 energy levels. ruby has 3 energy level. 4.he-ne laser gives continuous output. ruby laser gives output in form of pulse 5. he-ne laser is cheaper
Why Laser action is sometimes called inverted absorption?
Laser action is sometimes called inverted absorption because in traditional absorption processes, electrons are excited to higher energy levels. In laser action, the process is inverted, where electrons are already in higher energy levels before emitting photons through stimulated emission. This results in amplification of light instead of attenuation, as in absorption.
What are the types of pumping in lasers?
A laser emits a beam of energy in the form of light. But to get energy out of a laser, we have to put some in. Depending on the type of laser, there are different ways to do this. What is important here is that the energy put into the lasing medium, the energy that is pumped into that medium to stimulate it, to excite it (the actual term), to induce it to lase, is supplied by an outside source, by a pump appropriate to that type of laser. So the pump, that thing outside the medium that stimulates it to induce it into lasing, is pumping when it is exciting the medium. Hope this was, um, coherent....
How population inversion is accomplished in laser?
by pumping electrons to higher energy orbitals.
How is he-ne laser superior to ruby laser?
Helium neon laser is better than ruby laser or most of the four level lasers are better than three level lasers due to the following reasons: The laser output is continuous in the case of helium-neon laser. But it is in the form of pulse in the ruby laser. Ruby laser requires high power pumping source, whereas Helium-neon laser requires low power pumping source like electric discharge. Efficiency of helium-neon laser is more than ruby laser. The defects due to crystalline imperfections are also present in the ruby laser. But it is not so in the helium-neon laser.
What has the author Dieter Suter written?
Dieter Suter has written: 'The physics of laser-atom interactions' -- subject(s): Optical pumping, Laser manipulation (Nuclear physics), Laser spectroscopy
Why optical pumping cannot be used for helium neon laser?
Optical pumping is not efficient for helium-neon lasers because the energy levels involved in population inversion for the laser transition are insensitive to optical pumping. The pumping process does not efficiently promote electrons to the necessary excited state, limiting its effectiveness for helium-neon lasers.
Why electrical pumping is using for gas laser?
gas lasers do not usually lend themselves to lamp pumping because the absorption lines are typically much narrower than the usual broadband emission of the lamp. Electrical pumping of gas lasers ,on the other hand can be a fairly efficient process because the linewidth of excitation cross section of a given transition by electron impact is usually quite large
Does OKI manufacture laser printers suitable for home use as well as commercial?
OKI does manufacture laser printers suitable for home use as well as commercial use. Their home laser printers are just as great as the commercial ones.
Why 4 level laser system is better than 3 level laser system?
Three and Four Level Laser SchemesWe have said that the two level scheme is not generally feasible for laser action. There are two main reasons for this. The first reason is that the energy being used to pump the particles into the upper laser state has an equal probability of stimulating them back down. Thus it is not possible to get nore than half of the particles into the excited state. The three level scheme gets around this problem by first exciting the particles to an excited state higher in energy than the upper laser state.(See figure below) The particles then quickly decay down into the upper laser state. It is important for the pumped state to have a short lifetime for spontaneous emission compared to the upper laser state. The upper laser state should have as long a lifetime (for spontaneous emission) as possible, so that the particles live long enough to be stimulated and thus contribute to the gain.The four level laser scheme goes one step further and also depopulates the lower laser level by a fast decay process.(see figure below) This greatly decreases the loss of laser photons (v2) by stimulated absorption processes since the particles in the lower laser level have a short life-time for spontaneous emission.
What type of pumping is used in ruby laser and why?
This is kirit vaghela, The answer for the above question is that as far as ruby laser is concerned the pupmping is used is nothing but it is completed by optical pupmping.
Why electrical discharge pumping is used in helium neon laser?
because of gas in active center Neon gas worked as Active Center for He-Ne laser.to accelerate the Ne atoms very high and efficient Pumping is required. Which can only be given by Electric Discharge Pumping.
Why there is a need of optical resonator in laser?
to increase the wavelength of the beam and increase the laser action
What are applications of Nitrogen Laser?
Nitrogen lasers are primarily used in spectroscopy, laser-induced fluorescence, and material processing applications. They are also used in scientific research, for laser pumping in dye lasers, and in medical treatments like dermatology and eye surgery.
