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Polarizing grating coupler for high Q laser cavities

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8 Author(s)
Ahmed, M.A. ; TSI Lab., St.-Etienne Univ., France ; Pigeon, F. ; Tishchenko, A.V. ; Parriaux, O.
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A coupling grating made in the last high-index layer of a highly reflective multilayer laser output mirror, located at the outside of the laser cavity, induces a significant fall of the reflection coefficient for one of the polarizations. The lasing polarization does not suffer more than 0.1% scattering. The understanding of device operation revealed by experiments shows the way for achieving an industrial manufacturing scheme, despite the poor control which layer-deposition technologies presently have on the layer index and thickness separately.

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Quantum Electronics, IEEE Journal of  (Volume:39 ,  Issue: 4 )