Integrated lasers in crystalline double tungstates with focused-ion-beam nanostructured photonic cavities

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Ay, F. and Inurrategui, I. and Geskus, D. and Aravazhi, S. and Pollnau, M. (2011) Integrated lasers in crystalline double tungstates with focused-ion-beam nanostructured photonic cavities. Laser Physics Letters, 8 (6). pp. 423-430. ISSN 1612-2011

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Abstract:Deeply etched Bragg gratings were fabricated by focused ion beam (FIB) milling in KGdxLu1-x(WO4)2:Yb3+ to obtain photonic cavity structures. By optimizing parameters such as dose per area, dwell time and pixel resolution the redeposition effects were minimized and grating structures more than 4 µm in depth with an improved sidewall angle of ~5 degrees were achieved. Fabry-Perot microcavities were defined and used to assess the optical performance of the grating structures at ~1530 nm. An on-chip integrated laser cavity at ~980 nm was achieved by defining a FIB reflective grating and FIB polished waveguide end-facet. With this cavity, an on-chip integrated waveguide laser in crystalline potassium double tungstate was demonstrated.
Item Type:Article
Copyright:© 2011 Wiley-VCH Verlag
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/76407
Official URL:http://dx.doi.org/10.1002/lapl.201110013
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