In this contribution, we review the results of the ALSI project (Advanced Laser-writing for Stellar Interferometry), aimed at assessing the potential of ultrafast laser writing to fabricate mid-infared integrated optics (IO) devices with performance compatible with an implementation in real interferometric instruments like Hi5 or PFI. Waveguides for the L, L' and M bands with moderate propagation losses were manufactured in Gallium Lanthanum Sulfide and ZBLAN glasses and used to develop photonic building blocks as well as a full mid-IR 4-telescope beam combiner. We discuss the advantages and disadvantages of the tested combiners and discuss a possible roadmap for the continuation of this work.
|Title of host publication||Optical and Infrared Interferometry and Imaging VI|
|Editors||Michelle J. Creech-Eakman, Peter G. Tuthill, Antoine Mérand|
|Place of Publication||Bellingham, Washington|
|Number of pages||16|
|Publication status||Published - 9 Jul 2018|
|Event||2018 Optical and Infrared Interferometry and Imaging VI - Austin, United States|
Duration: 11 Jun 2018 → 15 Jun 2018
|Name||Proceedings of SPIE|
|Conference||2018 Optical and Infrared Interferometry and Imaging VI|
|Period||11/06/18 → 15/06/18|
Bibliographical noteCopyright 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
- Integrated Optics
- long-baseline interferometry
- optical/infrared instrumentation