Excited‐state absorption in the pump region of alexandrite

摘要: Excited‐state absorption in alexandrite has been measured from 420 to 680 nm by using pulsed flash lamp pumping and a dye laser probe. The excited‐state cross section is generally of the same order magnitude as ground‐state (10−19 cm2) therefore may represent large loss energy pump source system. results were confirmed at two wavelengths with cw experiment which 568‐ or 590‐nm radiation was used for probing.