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  As2S3-silica double-nanospike waveguide for mid-infrared supercontinuum generation

Xie, S., Tani, F., Travers, J. C., Uebel, P., Caillaud, C., Troles, J., et al. (2014). As2S3-silica double-nanospike waveguide for mid-infrared supercontinuum generation. OPTICS LETTERS, 39(17), 5216-5219. doi:10.1364/OL.39.005216.

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 Creators:
Xie, Shangran1, Author           
Tani, Francesco1, 2, Author           
Travers, John C.1, Author           
Uebel, Patrick1, Author           
Caillaud, Celine3, Author
Troles, Johann3, Author
Schmidt, Markus A.1, Author           
Russell, Philip St J.1, Author           
Affiliations:
1Russell Division, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364721              
2International Max Planck Research School, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364697              
3external, ou_persistent22              

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Free keywords: FIBER LASER; CHALCOGENIDE; GRATINGSOptics;
 Abstract: A double-nanospike As2S3-silica hybrid waveguide structure is reported. The structure comprises nanotapers at input and output ends of a step-index waveguide with a subwavelength core (1 mu m in diameter), with the aim of increasing the in-coupling and out-coupling efficiency. The design of the input nanospike is numerically optimized to match both the diameter and divergence of the input beam, resulting in efficient excitation of the fundamental mode of the waveguide. The output nanospike is introduced to reduce the output beam divergence and the strong endface Fresnel reflection. The insertion loss of the waveguide is measured to be similar to 2 dB at 1550 nm in the case of free-space in-coupling, which is similar to 7 dB lower than the previously reported single-nanospike waveguide. By pumping a 3-mm-long waveguide at 1550 nm using a 60-fs fiber laser, an octave-spanning supercontinuum (from 0.8 to beyond 2.5 mu m) is generated at 38 pJ input energy. (C) 2014 Optical Society of America

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Language(s): eng - English
 Dates: 2014
 Publication Status: Issued
 Pages: 4
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000341100300062
DOI: 10.1364/OL.39.005216
 Degree: -

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Title: OPTICS LETTERS
Source Genre: Journal
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Publ. Info: 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA : OPTICAL SOC AMER
Pages: - Volume / Issue: 39 (17) Sequence Number: - Start / End Page: 5216 - 5219 Identifier: ISSN: 0146-9592