Chalcogenide glass planar MIR couplers for future chip based Bracewell interferometers

H-D. Kenchington Goldsmith, N. Cvetojevic, M. Ireland, P. Ma, P. Tuthill, B. Eggleton, J. S. Lawrence, S. Debbarma, B. Luther-Davies, S. J. Madden

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

6 Citations (Scopus)
9 Downloads (Pure)

Abstract

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.

Original languageEnglish
Title of host publicationOptical and Infrared Interferometry and Imaging V
EditorsFabien Malbet, Michelle J. Creech-Eakman, Peter G. Tuthill
Place of PublicationWashington
PublisherSPIE
Pages1-7
Number of pages7
ISBN (Electronic)9781510601932
DOIs
Publication statusPublished - 2016
EventOptical and Infrared Interferometry and Imaging V - Edinburgh, United Kingdom
Duration: 27 Jun 20161 Jul 2016

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume9907
ISSN (Print)0277-786X

Other

OtherOptical and Infrared Interferometry and Imaging V
CountryUnited Kingdom
CityEdinburgh
Period27/06/161/07/16

Bibliographical note

Copyright 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.

Keywords

  • Chalcogenide Glass
  • Exoplanets
  • Infrared
  • Photonic Chips
  • Photonics

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