Do you know about VCSEL laser market?

The first appearance in the late 1970s revolutionised the quantum states of materials studied as green laser pointer to atomic gases cooled to ultra-low temperatures. The first Bose-Einstein condensates were made in the laboratory in 1995. The first Fermi-Dirac condensates were created in 2003, two important milestones for the technology. The technique relies on the fact that photons carry small amounts of momentum and, under certain conditions, their atomic reabsorption and re-emission can reduce their random motion and thus lower their temperature. The freedom of molecules to rotate and vibrate complicates the cooling of molecules, rather than atoms, which affects their absorption and emission of photons. Thus, absorption and emission of photons cause molecules to enter a "dark state" that no longer participates in the cooling process. Despite the challenges, David DeMille and colleagues at Yale university tried in 2014 to cool strontium fluoride diatomic molecules using a 30mw green laser.