Frequency control of DBR diode lasers at 1.08 micrometer and precision spectroscopy of helium

Year: 1996

Authors: Prevedelli M., Cancio P., Giusfredi G., Pavone FS., Inguscio M.

Autors Affiliation: Dipartimento di Fisica, Università di Firenze
European Laboratory for Non-Linear Spectroscopy (LENS) and INFM, Sez. di Firenze
Istituto Nazionale di Ottica (INO)

Abstract: We report difference frequency measurements on the spectrum of helium by phase-locking two DBR diode lasers at 1.08 mu m. A mirror terminated extended cavity is used for narrowing the laser linewidth to few hundred kHz. Phase-locking between two narrowed lasers is then achieved up frequency differences of 40 GHz. From the investigation of the 2(3)P helium multiplet we extract a preliminary value for the 2(3)P(0) – 2(3)P(1) fine structure splitting with an accuracy of 25 kHz, corresponding to 9 parts in 10(7).


Volume: 125 (4-6)      Pages from: 231  to: 236

KeyWords: DBR laser; spectroscopy; helium
DOI: 10.1016/0030-4018(96)00053-3

Citations: 43
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