Arriola, Alexander, Mukherjee, Sebabrata ORCID: 0000-0003-1942-2521, Choudhury, Debaditya, Labadie, Lucas ORCID: 0000-0001-5342-5713 and Thomson, Robert R. (2014). Ultrafast laser inscription of mid-IR directional couplers for stellar interferometry. Opt. Lett., 39 (16). S. 4820 - 4823. WASHINGTON: OPTICAL SOC AMER. ISSN 1539-4794

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Abstract

We report the ultrafast laser fabrication and mid-IR characterization (3.39 mu m) of four-port evanescent field directional couplers. The couplers were fabricated in a commercial gallium lanthanum sulfide glass substrate using sub-picosecond laser pulses of 1030 nm light. Straight waveguides inscribed using optimal fabrication parameters were found to exhibit propagation losses of similar to 0.8 dB.cm(-1). A series of couplers were inscribed with different interaction lengths, and we demonstrate power-splitting ratios of between 8% and 99% for mid-IR light with a wavelength of 3.39 mu m. These results clearly demonstrate that ultrafast laser inscription can be used to fabricate high-quality evanescent field couplers for future applications in astronomical interferometry. (C) 2014 Optical Society of America

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Arriola, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mukherjee, SebabrataUNSPECIFIEDorcid.org/0000-0003-1942-2521UNSPECIFIED
Choudhury, DebadityaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Labadie, LucasUNSPECIFIEDorcid.org/0000-0001-5342-5713UNSPECIFIED
Thomson, Robert R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-431974
DOI: 10.1364/OL.39.004820
Journal or Publication Title: Opt. Lett.
Volume: 39
Number: 16
Page Range: S. 4820 - 4823
Date: 2014
Publisher: OPTICAL SOC AMER
Place of Publication: WASHINGTON
ISSN: 1539-4794
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics I
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
GUIDE-BRAGG GRATINGS; WAVE-GUIDES; ASTRONOMICAL INSTRUMENTS; CHALCOGENIDE GLASS; PHOTONIC CIRCUITS; FEMTOSECOND LASER; WRITTEN; IMAGESMultiple languages
OpticsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/43197

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