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Raymond Laser was established in 2011, with nearly 13 years of experience as an industry pioneer.With a deep investment in our own proprietary marking laser designs, laser marking systems and laser etchers, we are able to find the best solutions for your particular application.
Analysis of Laser Refrigeration Principle of Optical Fiber Laser Marker
Temperature is a physical quantity that represents the degree of cold and heat of an object, and microscopically it is the degree of intense thermal motion of an object molecule. As we all know, all the molecules and atoms around us are constantly moving irregularly. The essence of our refrigeration is to reduce the intensity of thermal motion of these molecules or atoms in general, optical fiber laser marker.
1. Doppler cooling is an important technology in laser refrigeration. The principle of Doppler cooling is to block the thermal movement of atoms by emitting photons from lasers, which is achieved by reducing the momentum of atoms. So how does a laser actually reduce the momentum of these atoms?
mopa 20w laser marking machine and mopa 30w deep mark laser marking machine:
Firstly, quantum mechanics proposes that atoms can only absorb photons of a specific frequency, thus changing their momentum. Doppler effect indicates that the frequency of the wave increases when the source moves towards the observer, but decreases when the source is far away from the observer. The same conclusion can be reached when the observer moves.
Similarly, for atoms, the frequency of the photon increases when the direction of motion of the atom is opposite to that of the photon, and decreases when the direction of motion of the atom is the same as that of the photon. Then another physical principle is that light has momentum even though it has no static mass. So by synthesizing the above several physical characteristics, we can construct a simple model of laser cooling,mopa 20w laser marking machine and mopa 30w deep mark laser marking machine.
2. The frequency of the laser is adjustable in a certain range. When the frequency of the laser is slightly lower than the absorbable frequency of an atom, there will be unexpected results. This happens when a particular atom is illuminated with such a beam of light. If the atom is moving towards the laser beam, the frequency of the photon increases due to the Doppler effect of the light, and the frequency of the original laser photon is just a little less than the absorbable frequency of the atom, then it is just absorbed by the atom due to the Doppler effect.