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International Conference Laser M2P 2, Grenoble : France (1991)
A SINGLE-MODE, DIODE-PUMPED LMA LASER TO PROBE THE SPIN ORIENTATION OF ENSEMBLES OF 3He AND 4He
L. Schearer1, S. Essabaa1, M. Leduc2
(1991)

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.
1 :  IPNO - Institut de Physique Nucléaire d'Orsay
2 :  LSH-ENS - Laboratoire de Spectroscopie Hertzienne de l'ENS
Physique/Articles anciens

Physique/Physique/Instrumentations et Détecteurs
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