SIMPLE AND EFFICIENT METHOD OF SPIN-POLARIZING A METASTABLE HELIUM BEAM BY DIODE-LASER OPTICAL-PUMPING

被引：15

作者：

GRANITZA, B ^{[1
]}

SALVIETTI, M ^{[1
]}

TORELLO, E ^{[1
]}

MATTERA, L ^{[1
]}

SASSO, A ^{[1
]}

机构：

[1] UNIV NAPLES FEDERICO II,DIPARTIMENTO SCI FIS,I-80125 NAPLES,ITALY

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1995年 / 66卷 / 08期

关键词：

D O I：

10.1063/1.1145366

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Diode laser optical pumping to produce a highly spin-polarized metastable He beam to be used in a spin-polarized metastable atom deexcitation spectroscopy experiment on magnetized surfaces is described. Efficient pumping of the beam is performed by means of an SDL-6702 distributed Bragg reflector diode laser which yields 50 mW of output power in a single longitudinal mode at 1083 nm, the resonance wavelength for the 2(3) S-->2(3) P-0,P-1,P-2 (D-0, D-1, and D-2) transitions of He*. The light is circularly polarized by a quarter-wave plate, allowing easy change of the sense of atomic polarization. The laser frequency can be locked to the atomic transition for several hours by phase-sensitive detection of the saturated absorption signal in a He discharge cell. Any of the three transitions of the triplet system can be pumped with the laser but the maximum level of atomic polarization of 98.5% is found pumping the D-2 line. (C) 1995 American Institute of Physics.

引用

页码：4170 / 4173

页数：4