Laser refrigeration

Doppler refrigeration technology

• All the molecules and atoms around us are engaged in endless and irregular thermal motion, and temperature is a physical measure representing the intensity of this thermal motion. The higher the temperature is, the more intense the thermal movement is, and on the contrary, the smoother the motion is.

• Refrigeration by reducing the intensity of the overall thermal motion of these molecules or atoms.The principle of Doppler cooling technology is to block the thermal movement of atoms by emitting photons of lasers to cool objects.

anti-Stokes fluorescence refrigeration

• Is the developing new concept of refrigeration methods.

• The basic principle is the anti-Stokes effect, which uses the energy difference between scattering and incident photons.

• The anti-Stokes effect is a special scattering effect with scattering a short fluorescence photon wavelength shorter than the incident photon wavelength. Thus, the scattering fluorescence photon energy is higher than the incident photon energy.

• The process can be simply understood as: with low energy laser photon to stimulate the luminescent medium, the light emitting medium scattered high energy photon, the original energy in the light emitting medium out of the medium and refrigeration. Compared with the traditional refrigeration methods, the laser plays a role in providing the cooling power, while the scattered anti-Stokes fluorescence is the heat carrier.