{"id":33,"date":"2021-06-02T13:36:25","date_gmt":"2021-06-02T13:36:25","guid":{"rendered":"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/?page_id=33"},"modified":"2021-06-18T11:55:14","modified_gmt":"2021-06-18T10:55:14","slug":"research","status":"publish","type":"page","link":"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/research\/","title":{"rendered":"Research"},"content":{"rendered":"\n<hr class=\"wp-block-separator alignwide\"\/>\n\n\n\n<h2>The MLR-TT sensor<\/h2>\n\n\n\n<p>I have been leading the micro-lens ring, tip-tilt sensor (MLR-TT sensor) project. This concept has first been introduced by Dietrich &amp; Harris, et al. 2017 (<a href=\"https:\/\/doi.org\/10.1364\/OE.25.018288\">doi:10.1364\/OE.25.018288<\/a>) featuring a micro-lens array (MLA) on top of a single-mode, multi-code fiber and I subsequently optimized and implemented a modified version with a micro-lens ring coupling light into multi-mode fibers (MMFs) for sensing while coupling into a SMF for science observation.<br><em>For related publication, please see <a href=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/curriculum-vitae\/\" data-type=\"page\" data-id=\"35\">here<\/a>.<\/em><\/p>\n\n\n\n<p>Here follow some impressions&#8230;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"576\" src=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR_cad-1024x576.png\" alt=\"\" class=\"wp-image-84\" srcset=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR_cad-1024x576.png 1024w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR_cad-300x169.png 300w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR_cad-768x432.png 768w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR_cad-1536x864.png 1536w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR_cad-1200x675.png 1200w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR_cad.png 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Telescope beam entering the MLR-TT sensor (artist impression)<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"660\" src=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLAv1b_angleview_withscale_withcloseup-1024x660.png\" alt=\"\" class=\"wp-image-83\" srcset=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLAv1b_angleview_withscale_withcloseup-1024x660.png 1024w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLAv1b_angleview_withscale_withcloseup-300x193.png 300w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLAv1b_angleview_withscale_withcloseup-768x495.png 768w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLAv1b_angleview_withscale_withcloseup-1200x773.png 1200w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLAv1b_angleview_withscale_withcloseup.png 1383w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Close-up photograph of the MLR on the fiber face (Hottinger et al., 2019, Proceedings of AO4ELT6, arXiv:1912.09537)<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-video\"><video controls src=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/output.webm\"><\/video><figcaption>Simple overview of the working principle. As the incoming beam continues to become misaligned, the coupling into the outer MMFs changes allowing a reconstruction of the centroid position. (Hottinger, 2019, presented at AO4ELT6)<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"768\" src=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR-at-LBT-1024x768.jpg\" alt=\"\" class=\"wp-image-86\" srcset=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR-at-LBT-1024x768.jpg 1024w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR-at-LBT-300x225.jpg 300w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR-at-LBT-768x576.jpg 768w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR-at-LBT-1536x1152.jpg 1536w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR-at-LBT-2048x1536.jpg 2048w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR-at-LBT-1200x900.jpg 1200w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/MLR-at-LBT-1980x1485.jpg 1980w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Integrating the MLR-TT sensor&#8217;s optical and electronic enclosure (black, right) to the iLocater acquisition camera (blue, left) at the LBT in 2019.<\/figcaption><\/figure>\n\n\n\n<hr class=\"wp-block-separator alignwide\"\/>\n\n\n\n<h2>Laboratory development<\/h2>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" src=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool_3.png\" alt=\"\" class=\"wp-image-101\" width=\"437\" height=\"190\" srcset=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool_3.png 869w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool_3-300x130.png 300w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool_3-768x334.png 768w\" sizes=\"(max-width: 437px) 100vw, 437px\" \/><\/figure><\/div>\n\n\n\n<p>I have been involved in the <em>K\u00f6nigstuhl Observatory Opto-mechatronics Laboratory<\/em> (KOOL), which is run at Max-Planck-Institute for Astronomy (MPIA, PI J\u00f6rg-Uwe Pott) in Heidelberg, Germany. KOOL is a joint project of the MPIA, the Landessternwarte (University Heidelberg), and the Institute for System Dynamics (University Stuttgart).<\/p>\n\n\n\n<p>KOOL is an adaptive optics (AO) testbed that allows both disturbing and correction of a telescope simulator&#8217;s pupil. I have added an infrared beam path and a fiber coupling arm for single-mode fiber measurements and system development.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"683\" src=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool-fiber-coupling_IR-imaging_compressed-1024x683.jpg\" alt=\"\" class=\"wp-image-81\" srcset=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool-fiber-coupling_IR-imaging_compressed-1024x683.jpg 1024w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool-fiber-coupling_IR-imaging_compressed-300x200.jpg 300w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool-fiber-coupling_IR-imaging_compressed-768x512.jpg 768w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool-fiber-coupling_IR-imaging_compressed-1536x1024.jpg 1536w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool-fiber-coupling_IR-imaging_compressed-2048x1365.jpg 2048w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool-fiber-coupling_IR-imaging_compressed-1200x800.jpg 1200w, https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/kool-fiber-coupling_IR-imaging_compressed-1980x1320.jpg 1980w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>KOOL fiber coupling arm incl. the MLR-TT sensor.<\/figcaption><\/figure>\n\n\n\n<hr class=\"wp-block-separator alignwide\"\/>\n\n\n\n<h2>Planet formation theory<\/h2>\n\n\n\n<p>In my master thesis I used a hydrodynamic Riemann solver (PLUTO v4.2, Mignone et al. 2007) to simulate warped protoplanetary disks and investigated the experienced numerical effects.<br><\/p>\n\n\n\n<figure class=\"wp-block-video\"><video controls src=\"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-content\/uploads\/2021\/06\/Warped-disk-A22-10deg-vol.webm\"><\/video><figcaption>Hydrodynamic simulation of warped protoplanetary disks. The two disks have a initial misaligned configuration but both feel a numerical torque acting to align them to each other and to the grid.<br>Simulated with PLUTO, visualized with Paraview. (M.Sc. Thesis: <em>A Numerical Investigation of Warped Protoplanetary Disks<\/em> at MPIA under supervision of Hubert Klahr; Hottinger, 2016)<\/figcaption><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The MLR-TT sensor I have been leading the micro-lens ring, tip-tilt sensor (MLR-TT sensor) project. This concept has first been introduced by Dietrich &amp; Harris, et al. 2017 (doi:10.1364\/OE.25.018288) featuring a micro-lens array (MLA) on top of a single-mode, multi-code fiber and I subsequently optimized and implemented a modified version with a micro-lens ring coupling [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-json\/wp\/v2\/pages\/33"}],"collection":[{"href":"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-json\/wp\/v2\/comments?post=33"}],"version-history":[{"count":17,"href":"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-json\/wp\/v2\/pages\/33\/revisions"}],"predecessor-version":[{"id":125,"href":"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-json\/wp\/v2\/pages\/33\/revisions\/125"}],"wp:attachment":[{"href":"https:\/\/www.lsw.uni-heidelberg.de\/users\/phottinger\/wordpress\/wp-json\/wp\/v2\/media?parent=33"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}