Geometrical transformation of linear diode-laser arrays for longitudinal pumping of solid-state lasers
Technical Report
·
OSTI ID:6997275
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 percent is demonstrated. Methods of increasing the throughput efficiency of the diffractive elements (currently approximately 50 percent per element) re 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.
- Research Organization:
- Massachusetts Inst. of Tech., Lexington, MA (United States). Lincoln Lab.
- OSTI ID:
- 6997275
- Report Number(s):
- AD-A-253415/4/XAB; TR-950; CNN: F19628-90-C-0002
- Country of Publication:
- United States
- Language:
- English
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