Photonic integrated circuits are established as the technique of choice for a number of astronomical processing functions due to their compactness, high level of integration, low losses, and stability. Temperature control, mechanical vibration and acoustic noise become controllable for such a device enabling much more complex processing than can realistically be considered with bulk optics. To date the benefits have mainly been at wavelengths around 1550 nm but in the important Mid-Infrared region, standard photonic chips absorb light strongly. Chalcogenide glasses are well known for their transparency to beyond 10000 nm, and the first results from coupler devices intended for use in an interferometric nuller for exoplanetary observation in the Mid-Infrared L' band (3800-4200 nm) are presented here showing that suitable performance can be obtained both theoretically and experimentally for the first fabricated devices operating at 4000 nm.
|Title of host publication||Optical and Infrared Interferometry and Imaging V|
|Editors||Fabien Malbet, Michelle J. Creech-Eakman, Peter G. Tuthill|
|Place of Publication||Washington|
|Number of pages||7|
|Publication status||Published - 2016|
|Event||Optical and Infrared Interferometry and Imaging V - Edinburgh, United Kingdom|
Duration: 27 Jun 2016 → 1 Jul 2016
|Name||Proceedings of SPIE|
|Other||Optical and Infrared Interferometry and Imaging V|
|Period||27/06/16 → 1/07/16|
Bibliographical noteCopyright 2016 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.
- Chalcogenide Glass
- Photonic Chips