FREQUENCY CONTROL OF DBR DIODE-LASERS AT 1.08 MICROMETER AND PRECISION SPECTROSCOPY OF HELIUM

Authors
PREVEDELLI M CANCIO P GIUSFREDI G PAVONE FS INGUSCIO M
Citation
M. Prevedelli et al., FREQUENCY CONTROL OF DBR DIODE-LASERS AT 1.08 MICROMETER AND PRECISION SPECTROSCOPY OF HELIUM, Optics communications, 125(4-6), 1996, pp. 231-236
Citations number
20
Categorie Soggetti
Optics
Journal title
Optics communications → ACNP
ISSN journal
00304018
Volume
125
Issue
4-6
Year of publication
1996
Pages
231 - 236
Database
ISI
SICI code
0030-4018(1996)125:4-6<231:FCODDA>2.0.ZU;2-I
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 terminate d extended cavity is used for narrowing the laser linewidth to few hun dred kHz. Phase-locking between two narrowed lasers is then achieved u p 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, correspond ing to 9 parts in 10(7).