Performance of smoothing by spectral dispersion (SSD) on Beamlet

Joshua E. Rothenberg; Bryan D. Moran; Mark A. Henesian; Bruno M. Van Wonterghem

doi:10.1117/12.294318

8 December 1997 Performance of smoothing by spectral dispersion (SSD) on Beamlet

Joshua E. Rothenberg, Bryan D. Moran, Mark A. Henesian, Bruno M. Van Wonterghem

Proceedings Volume 3047, Solid State Lasers for Application to Inertial Confinement Fusion: Second Annual International Conference; (1997) https://doi.org/10.1117/12.294318
Event: Second International Conference on Solid State Lasers for Application to ICF, 1996, Paris, France

Abstract

The performance of the Beamlet laser with 1D SSD implemented is investigated. Simulations indicate that the critical issue for laser performance is the amount of additional divergence owing to SSD in comparison to the size of the spatial filter pinholes. At the current +/- 200 (mu) rad pinholes used on Beamlet, simulations indicate that the levels of SSD divergence anticipated for the National Ignition Facility results in a very slight degradation to the near field beam quality. Experiments performed with the Beamlet front end show no degradation to the near field beam with up to 100 (mu) rad of SSD divergence. MEasurements of the smoothing of a far field speckle pattern generated by a phase plate show the expected improvement in contrast with increasing amounts of SSD divergence.

Citation Download Citation

Joshua E. Rothenberg, Bryan D. Moran, Mark A. Henesian, and Bruno M. Van Wonterghem "Performance of smoothing by spectral dispersion (SSD) on Beamlet", Proc. SPIE 3047, Solid State Lasers for Application to Inertial Confinement Fusion: Second Annual International Conference, (8 December 1997); https://doi.org/10.1117/12.294318

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