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Data for Adiabatic higher-order mode microfibers based on a logarithmic index profile
No full textData supporting the paper:
Yongmin Jung, Kerrianne Harrington, Stephanos Yerolatsitis, David J. Richardson, and Tim A. Birks, "Adiabatic higher-order mode microfibers based on a logarithmic index profile," Opt. Express 28, 19126-19132 (2020) DOI:https://doi.org/10.1364/OE.394098</span
Adiabatic higher-order mode microfibers based on a logarithmic index profile
No full textOptical fibers with a logarithmic index profile can provide invariant mode field diameters along a tapered fiber, which enables adiabatic mode transitions for higher-order mode (HOM) microfibers. A microfiber with a waist diameter of ~2 µm is fabricated with an insertion loss lower than 0.03 dB for the LP01 and 0.11 dB for the LP11 mode. The concept of the low loss HOM microfibers can be further extended to include more than one fiber and a 2×2 few mode microfiber coupler is fabricated/characterized in our experiments. These single or multiple spatial channel HOM microfibers are beneficial for various applications, including in particle propulsion, atom trapping, optical sensing and space division multiplexed data transmission systems
All-fibre pseudo-slit reformatters
No full textCollected data and code used for the results presented in the paper All-fibre pseudo-slit reformattersAn IR camera (Xenics XEVA -927) used and the near- and far- field intensity patterns were collected. Images were processed using the uploaded code.Matlab code for analysing the NF and FF intensity patterns captured using the IR camera. The code plots the x and y intensity profiles of all NF and FF patterns and calculates the centroid drift for each direction
Dataset for Ultra-low background Raman sensing using a negative-curvature fibre and no distal optics
No full textCollected data for the results presented in "Ultra-low background Raman sensing using a negative-curvature fibre and no distal optics" demonstrating the use of a single hollow core negative curvature fibre for Raman and surface enhanced Raman spectroscopy sensing. This new optical fibre shows a 1000x background reduction compared to conventional fibres while maintaining the same collection efficiency. The dataset includes Raman and SERS spectra from different samples and attenuation data for a range of wavelengths for the negative curvature fibre.The data (txt files) were collected using an Avantes SensLine Hero spectrometer and the setup described in the associated paper. The methodology used to obtain the data is also described in the paper.MATLAB was used to plot the acquired data, but is not needed to open the data files.Each subfolder contains the relevant data for each of the figures in the paper; each column of the complete data table for the figure has been saved as a separate text file
Dataset for "An endlessly adiabatic fibre with a logarithmic refractive index distribution"
Full text linkThis dataset contains the data underlying the results reported in K. Harrington et al., "An endlessly adiabatic fibre with a logarithmic refractive index distribution". The data includes the results of calculations and measurements of a fibre with a novel refractive index distribution. This includes calculated mode field diameters for various outer diameters of the fibre. Also included are optical micrographs and near-field images recorded by digital sensors and stress distributions for fibres made with different drawing conditions.The methodology used to obtain the data is described in the paper K. Harrington et al., "An endlessly adiabatic fibre with a logarithmic refractive index distribution".The tabular data files (*.txt) are presented as tab-separated values
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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