Nonlinear loss in Nd-doped laser glass
- 1 November 1972
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 21 (9), 427-430
- https://doi.org/10.1063/1.1654442
Abstract
The amplifier gain and the energy transmission in Nd‐glass were investigated as functions of light intensity using single picosecond pulses. The observed reductions of gain and transmission are well accounted for by a two‐photon absorption process in the Nd3+ system. There is good agreement between the measured and calculated two‐photon absorption cross section of σ′ = (1.3 ± 0.3) × 10−32 cm4/W. The two‐photon absorption limits the obtainable output intensity in a Nd‐glass amplifier and reduces the self‐focusing action in the material.Keywords
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