The production task of green laser pointer of this year is tighter than that of last year.
Optimal temperature in the optical axis pumping, the rubidium atomic vapor density of about one / When the bubble diameter of 5cm sample container wall when the atomic surface density of about a /, the rubidium atoms collide with the wall of the loss of polarization the main reason. Bubbles in the sample into the 10 care about filling the buffer gas can greatly reduce this impact, because the high pressure buffer gas density is about a /, rubidium vapor atomic density than six orders of magnitude, greatly reducing the rubidium atoms and the wall chance of collision, to maintain a high degree of atomic polarization. Temperature rubidium vapor atomic density increases, rubidium atoms with the wall and the collision between rubidium atoms are increased, reducing the atomic polarization. The temperature is too low too few rubidium atomic vapor, the signal amplitude is small, so there is optimum temperature range, generally between 40 and 60. The workshop needs to renew some equipments of machining green laser pointer .
Buffer gas molecules is not possible to sub-level transitions between all the suppression, it is not possible to fully pumped to the sub-particle energy levels. (Filling the buffer gas, the ground state has non-thermal equilibrium distribution back to the thermal equilibrium distribution of relaxation times about the order of magnitude). State of atoms in the buffer gas molecules need to collide many times with the possible occurrence of energy transfer. Since the process occurs mainly non-radiative transition, so return to the ground state Zeeman sub-levels of the eight equal probability, so the buffer gas molecules there will be pumping faster particles to sub-level role. In general, optical pumping caused by Zeeman sub-level difference between the number of particles than the Boltzmann distribution of the population difference to be caused by several orders of magnitude. The worker should abide by the rule of workshop of green laser pointer .
Similar conclusions, the difference is the light optical pumping of atoms to the ground state energy level on the sub. Discussed earlier, the optical pumping of the physical process, it is the process of electric dipole transitions, is the nature of optical resonance. Here we introduce the concept of magnetic resonance. Atom has a magnetic moment of an external electromagnetic alternating electromagnetic field, the magnetic state changes from the movement, so that the amount of atomic state changes. This alternating magnetic field in the amount of state changes as nuclear magnetic resonance dipole transitions, or called magnetic resonance. The manager is introducing green laser pointer with the help of the slide.