Journal
APPLIED PHYSICS LETTERS
Volume 101, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4764010
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- European Commission [224132]
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Vertical-cavity surface-emitting lasers (VCSELs) with single-mode, single-polarization emission at a wavelength of 894.6 nm have become attractive light sources for miniaturized Cs-based atomic clocks. So far, VCSELs used for these applications are single-mode because of small active diameters which has the drawbacks of increased ohmic resistance and reduced lifetime. By employing surface grating reliefs, enhanced fundamental-mode emission as well as polarization-stable laser oscillation are achieved. VCSELs with 5 mu m active diameter show side-mode suppression ratios of 20 dB even at currents close to thermal roll-over with orthogonal polarization suppression ratios better than 20 dB at elevated ambient temperatures up to 100 degrees C. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4764010]
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