We present a measurement technique of ESA at pump wavelength for the four-level lasers. In Cr:YAG, the ESA cross-section is 2.8·10-18 cm2. Validity of the method is proved by comparison with the ESA-free Cr:ZnSe laser.
© 2005 Optical Society of America
S. Naumov, E. Sorokin, and I. T. Sorokina, "Measurement of the Excited State Absorption Cross-Section in Cr4+:YAG Using Relaxation Oscillations Study," in Advanced Solid-State Photonics, Technical Digest (Optical Society of America, 2005), paper WB31.
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