Geometrical Transformation of Linear Diode-Laser Arrays for Longitudinal Pumping of Solid-State Lasers

James R. Leger, William C. Goltsos

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

A 200 stripe linear diode-laser array is geometrically transformed into a two-dimensional, symmetric virtual source with symmetric divergence to end pump a Nd: YAG laser. The geometrical transformation is performed by two planes of diffractive optical elements separated by a 2.6 cm gap. Discounting optical losses, a TEM00 mode slope efficiency of 56% is demonstrated. Methods of increasing the throughput efficiency of the diffractive elements (currently approximately 50% per element) are explored. A theoretical model for estimating the maximum useful pump array size in longitudinally pumped rod and fiber lasers shows that this pump geometry is close to optimum.

Original languageEnglish (US)
Pages (from-to)1088-1100
Number of pages13
JournalIEEE Journal of Quantum Electronics
Volume28
Issue number4
DOIs
StatePublished - Apr 1992

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