Open AccessRubidium spectroscopy at 778–780 nm with a distributed feedback laser diode
Author(s) -
Kraft S.,
Deninger A.,
Trück C.,
Fortágh J.,
Lison F.,
Zimmermann C.
Publication year - 2005
Publication title -
laser physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.59
H-Index - 72
eISSN - 1612-202X
pISSN - 1612-2011
DOI - 10.1002/lapl.200410155
Subject(s) - rubidium , spectroscopy , materials science , diode , optics , laser , tunable diode laser absorption spectroscopy , doppler effect , distributed feedback laser , line (geometry) , resolution (logic) , laser diode , optoelectronics , physics , potassium , quantum mechanics , geometry , mathematics , astronomy , artificial intelligence , computer science , metallurgy
We have performed high resolution spectroscopy of rubidium with a single mode continuous wave distributed feedback (DFB) laser diode. The saturation spectrum of the D 2 ‐line of 85 Rb and 87 Rb was recorded with a resolution close to the natural line width. The emission frequency was actively stabilized to Doppler‐free transitions with a relative accuracy of better than 7 parts in 10 9 using commercially available servo devices only. An output power of 80 mW was sufficient to allow for two‐photon spectroscopy of the 5S‐5D‐transition of 87 Rb. Further, we report on the spectral properties of the DFB diode, its tuning range and its frequency modulation properties. The line width of the diode laser, determined with high resolution Doppler free two photon spectroscopy, was 4 MHz without applying any active stabilization techniques. For time scales below 5 μ s the line width drops below 2 MHz. (© 2005 by Astro, Ltd. Published exclusively by WILEY‐VCH Verlag GmbH & Co. KGaA)