11. The excited molecules then undergo stimulated emission in the optical resonator region of the laser. 12. However, carriers are depleted as a result of stimulated emission faster than they are injected. 13. Maser oscillations rely on the stimulated emission between two hyperfine energy levels of atomic hydrogen. 14. The gain medium in which the scatterers lie will allow for stimulated emission to occur. 15. Amplification is achieved by stimulated emission of photons from dopant ions in the doped fibre. 16. Thus stimulated emission at frequencies away from \ nu _ 0 is reduced by this factor. 17. A nearby photon with energy equal to the recombination energy can cause recombination by stimulated emission . 18. The first cloning machine relied on stimulated emission to copy quantum information encoded into single photons. 19. Einstein showed that the coefficient for this transition must be identical to that for stimulated emission : 20. A "'maser "'(, an acronym for " microwave coherent electromagnetic waves through amplification by stimulated emission .
