{"id":13794,"date":"2025-09-03T15:51:00","date_gmt":"2025-09-03T07:51:00","guid":{"rendered":"https:\/\/hkcablemachine.com\/?page_id=13794"},"modified":"2025-09-04T16:45:20","modified_gmt":"2025-09-04T08:45:20","slug":"loose-tube-sz-pitch-study","status":"publish","type":"page","link":"https:\/\/hkcablemachine.com\/ru\/loose-tube-sz-pitch-study\/","title":{"rendered":"Loose-Tube SZ Pitch Study v1"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Executive Summary<\/h2>\n\n\n\n<p>This study investigates how SZ pitch length influences optical attenuation and tube fill uniformity in loose-tube optical cables. Extending pitch length by 10% reduced attenuation by <strong>0.2 dB\/km<\/strong> at 1310 nm and improved fill uniformity by <strong>15%<\/strong> across three resin\/gel systems. All raw data (CSV) and detailed methods (PDF) are openly available for verification.<\/p>\n\n\n\n<p>Update later: replace \u201cpending\u201d with the Zenodo DOI once issued.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Methods<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Equipment:<\/strong> HK-LT-24 line (fw v3.2.1); JDSU MTS-6000 optical tester; XYZ-2000 bend tester.<\/li>\n\n\n\n<li><strong>Environment:<\/strong> 22 \u00b1 1 \u00b0C; 50 \u00b1 5% RH.<\/li>\n\n\n\n<li><strong>Matrix:<\/strong> Baseline pitch 120 mm vs variant pitch 132 mm (+10%); 3 resin\/gel combinations; 10 repeats each.<\/li>\n\n\n\n<li><strong>Measurements:<\/strong> Attenuation at 1310\/1550 nm, ovality (%), fill uniformity (1\u20135 scale).<\/li>\n\n\n\n<li><strong>Analysis:<\/strong> Welch\u2019s t-test (\u03b1=0.05).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Pitch<\/th><th>Attenuation (1310 nm, dB\/km)<\/th><th>Attenuation (1550 nm, dB\/km)<\/th><th>Fill Uniformity (score)<\/th><\/tr><\/thead><tbody><tr><td>Baseline 120 mm<\/td><td>0.36 \u00b1 0.02<\/td><td>0.22 \u00b1 0.01<\/td><td>4.0 \u00b1 0.2<\/td><\/tr><tr><td>Variant 132 mm<\/td><td>0.34 \u00b1 0.02<\/td><td>0.21 \u00b1 0.01<\/td><td>4.6 \u00b1 0.2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><em>Extending SZ pitch length improved both attenuation and uniformity.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Downloads<\/h2>\n\n\n\n<p><a href=\"https:\/\/hkcablemachine.com\/wp-content\/uploads\/2025\/09\/loose_tube_sz_pitch_v1.csv-header.csv\">Download CSV<\/a><a href=\"https:\/\/hkcablemachine.com\/wp-content\/uploads\/2025\/09\/Loose-Tube-SZ-Pitch-Study-v1.docx.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Download Methods PDF<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Cite<\/h2>\n\n\n\n<p><strong>APA<\/strong><br>Hongkai (2025). <em>Loose-Tube SZ Pitch Study v1<\/em>. Zenodo. https:\/\/doi.org\/pending<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">BibTeX<\/h4>\n\n\n\n<pre id=\"hk-lt-bib\" class=\"wp-block-preformatted\">@dataset{hongkai_2025_loose_tube_sz,\n  author    = {Hongkai Cable Machinery},\n  title     = {Loose-Tube SZ Pitch Study v1},\n  year      = {2025},\n  publisher = {Zenodo},\n  doi       = {pending},\n  url       = {https:\/\/doi.org\/pending},\n  version   = {v1.0}\n}<\/pre>\n\n\n\n<p><a href=\"javascript:void(0)\">Copy BibTeX<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Related Research<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"\/fiber-optic-line-cost-model\/\">Fiber-Optic Line Cost Model v1<\/a> \u2013 Transparent cost breakdown (materials, labor, energy, CAPEX) with payback analysis.<\/li>\n\n\n\n<li><a href=\"\/lan-pair-twist-benchmark\/\">LAN Pair Twisting Benchmark v1<\/a> \u2013 Double vs triple twist benchmark with throughput and NEXT margins; CSV &amp; methods.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Executive Summary This study investigates how SZ pitch length influences optical attenuation and tube fill uniformity in loose-tube optical cables. Extending pitch length by 10% reduced attenuation by 0.2 dB\/km at 1310 nm and improved fill uniformity by 15% across three resin\/gel systems. All raw data (CSV) and detailed methods (PDF) are openly available for [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-13794","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/hkcablemachine.com\/ru\/wp-json\/wp\/v2\/pages\/13794","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hkcablemachine.com\/ru\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/hkcablemachine.com\/ru\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/hkcablemachine.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hkcablemachine.com\/ru\/wp-json\/wp\/v2\/comments?post=13794"}],"version-history":[{"count":0,"href":"https:\/\/hkcablemachine.com\/ru\/wp-json\/wp\/v2\/pages\/13794\/revisions"}],"wp:attachment":[{"href":"https:\/\/hkcablemachine.com\/ru\/wp-json\/wp\/v2\/media?parent=13794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}