Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/147702
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- Title
- Direct laser written multimode waveguides for astronomical applications
- Related
- SPIE Astronomical Telescopes and Instrumentation (27 June - 2nd July 2010 : San Diego, CA)
- Related
- Atad-Ettedgui, Eli and Lemke, Dietrich. Modern technologies in space- and ground-based telescopes and instrumentation : 27 June-2 July 2010, San Diego, California, United States, p.773923-1-773923-8
- DOI
- 10.1117/12.856754
- Related
- Proceedings of SPIE Vol. 7739
- Publisher
- Bellingham, Wash : SPIE
- Date
- 2010
- Author/Creator
- Jovanovic, Nemanja
- Author/Creator
- Gross, Simon
- Author/Creator
- Miese, Christopher
- Author/Creator
- Fuerbach, Alexander
- Author/Creator
- Lawrence, Jon
- Author/Creator
- Withford, Michael J
- Description
- In this publication we present the results of a detailed study into directly written multimode waveguides for astronomical applications. We show that waveguides up to 100 m across can be inscribed with the cumulative heating form of this technique. The waveguides have 2 concentric guiding regions which are elliptical; a core that has an average ellipticity of 1.1±0.1 and an outer cladding with an ellipticity of 0.15±0.03. It was demonstrated that the ellipticity of the waveguides could be reduced by creating "structured" waveguides which consist of several waveguides stacked together. The 7 mm long waveguides demonstrated insertion losses at 800 nm as low as 39% when light was launched and collected by a standard multimode fibre (50 m core diameter and numerical aperture of 0.12), which is representative of the fibres currently used on astronomical installations. More importantly, we show for the first time that structured waveguides designed to have outer cladding regions which match the dimensions of the core of the launch and collection fibers, have lower insertion losses than structured waveguides designed to have matching core dimensions. It is believed that by moving to longer wavelengths of operation and exploring other structuring and beam shaping techniques it may be possible to reduce the losses even further and make these waveguides of practical use for astronomy.
- Description
- 8 page(s)
- Subject Keyword
- Multimode waveguides
- Subject Keyword
- direct-write technique
- Subject Keyword
- femtosecond laser
- Subject Keyword
- ultrafast material processing
- Subject Keyword
- astrophotonics
- Resource Type
- conference paper
- Organisation
- Macquarie University. Dept. of Physics and Astronomy
- Identifier
- http://hdl.handle.net/1959.14/147702
- Identifier
- ISBN:9780819482297
- Identifier
- ISSN:0277-786X
- Identifier
- mq-rm-2010004110
- Language
- eng
- Rights
- Copyright 2010 Society of Photo Optical Instrumentation Engineers. 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.
- Full Text
- Reviewed
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