A SINGLE-MODE, DIODE-PUMPED LMA LASER TO PROBE THE SPIN ORIENTATION OF ENSEMBLES OF 3He AND 4HeReportar como inadecuado




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1 IPNO - Institut de Physique Nucléaire d-Orsay 2 LSH-ENS - Laboratoire de Spectroscopie Hertzienne de l-ENS

Abstract : A diode-pumped Nd:Lanthanum Magnesium Hexaluminate laser was constructed which provides up to 15 mW of single-mode, tunable CW emission at 1083 nm. By appropriately polarizing the narrow-band laser emission < 10 MHz, the laser can be used to determine the populations of the magnetic substates of the He 23S1 atoms. The laser is tuned to one of the absorption peaks of the helium metastable atom by tilting a thin 1 mm solid, coated etalon placed inside the laser cavity and the absorption is measured. The relative absorption is used to determine the ensemble polarization ; the absolute absorption yields the metastable density.





Autor: L. Schearer - S. Essabaa - M. Leduc -

Fuente: https://hal.archives-ouvertes.fr/



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