Ruby Laser Construction and Working | 5 Applications

A ruby laser produces a beam of monochromatic photons with a wa... | Filo

Q-Switched Ruby Laser Power. A Q-switched ruby laser makes use of a 15-cm-long rod of cross-sectional area 1 em ^2 placed in a resonator of length 20  cm. The mirrors have reflectances ℛ1=0.95 and ℛ=0.7. The Cr^3 density is 1.58 ×10^17 atoms/cm ^3, and the transition cross section o(p0)=2 ×10^-20 cun^2. The laser is pumped to an initial population of 10^19 atoms/cm ^3 in the upper state with negligible population in the lower state. The pump band (level 3 ) is centered at ≈450  nm and the decay