Retrieving "Optical Pumping" from the archives

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1. Laser

   Linked via "Optical Pumping"

   The energy input required to achieve population inversion is called the pump source. The mechanism of pumping depends entirely on the state of the gain medium:
   Optical Pumping: Used typically for solid-state and gas lasers (e.g., Neodymium-doped Yttrium Aluminium Garnet (Nd:YAG)/) or Ruby lasers). High-intensity [flash lam…

2. Magnetometer

   Linked via "optical pumping"

   Optically Pumped Magnetometers (OPM)
   OPMs, often called alkali-vapor magnetometers, represent the pinnacle of sensitivity for ambient field measurement, achieving femtotesla ($\text{fT}$) resolution. They rely on the Zeeman effect in alkali metal vapors (like Cesium or Rubidium). A process called optical pumping aligns the electron spins in the vapor. T…