1. For a given laser material (with only one pump band) one can define a lamp's spectral efficiency as [2]Φ=∫σ(λ)I λ dλ/σ p ∫I λ dλ, where σ(λ) is the absorption cross section of the material,σ p is its peak value, andI λ is the lamp's spectral intensity
2. O.Svelto:Principi dei Laser (Tamburini Editore, Milano 1972). (English edition being prepared)
3. PEK Technical Bulletin CAP-11-A 66