{"id":2556,"date":"2025-10-01T20:40:03","date_gmt":"2025-10-01T20:40:03","guid":{"rendered":"https:\/\/www.oec-gmbh.de\/products\/photodiodes-detectors-sensors\/ingaas-apd-geiger-mode\/"},"modified":"2025-10-01T20:40:03","modified_gmt":"2025-10-01T20:40:03","slug":"ingaas-apd-geiger-mode","status":"publish","type":"page","link":"https:\/\/www.oec-gmbh.de\/en\/products\/photodiodes-detectors-sensors\/ingaas-avalanche-photodioden-apds\/ingaas-apd-geiger-mode\/","title":{"rendered":"InGaAs APD Geiger Mode"},"content":{"rendered":"<h5 data-start=\"180\" data-end=\"223\">Geiger-mode operation<\/h5>\n<p>In Geiger-mode operation, an InGaAs avalanche photodiode (APD) is operated above its breakdown voltage. In this state, the absorption of a single photon is sufficient to trigger avalanche multiplication and generate a measurable signal.<br \/>Detection occurs on a single-photon basis, enabling maximum sensitivity even at very low light levels. A quenching circuit is used to control the operation, reliably terminating the avalanche after the event and resetting the detector for the next photon measurement.  <\/p>\n<p><strong>Characteristics<\/strong><\/p>\n<ul>\n<li data-start=\"865\" data-end=\"912\">Operation above the breakdown voltage (Vbr)<\/li>\n<li data-start=\"915\" data-end=\"962\">Photon \u2192 electron avalanche \u2192 measurable signal<\/li>\n<li data-start=\"965\" data-end=\"1016\">Requires active or passive quenching circuit<\/li>\n<li data-start=\"1019\" data-end=\"1098\">Very high detection probability with simultaneously low dark noise<\/li>\n<\/ul>\n<p><strong>Typical applications<\/strong><\/p>\n<ul>\n<li data-start=\"1173\" data-end=\"1238\"><strong data-start=\"1173\" data-end=\"1182\">LIDAR<\/strong> for autonomous vehicles and precise distance measurement<\/li>\n<li data-start=\"1241\" data-end=\"1285\"><strong data-start=\"1241\" data-end=\"1283\">3D imaging &amp; time-of-flight cameras<\/strong><\/li>\n<li data-start=\"1288\" data-end=\"1353\"><strong data-start=\"1288\" data-end=\"1311\">Quantum technologies<\/strong> such as quantum communication &amp; cryptography<\/li>\n<li data-start=\"1356\" data-end=\"1435\"><strong data-start=\"1356\" data-end=\"1371\">Biophotonics<\/strong> for sensitive measurements up to single-molecule detection<\/li>\n<li data-start=\"1438\" data-end=\"1507\"><strong data-start=\"1438\" data-end=\"1452\">Astronomy<\/strong> for the detection of faint, distant light sources<\/li>\n<\/ul>\n<p><strong>Advantages of Geiger mode<\/strong><\/p>\n<ul>\n<li data-start=\"853\" data-end=\"912\"><strong data-start=\"853\" data-end=\"880\">Maximum sensitivit<\/strong> \u2013 detection of single photons<\/li>\n<li data-start=\"915\" data-end=\"974\"><strong data-start=\"915\" data-end=\"948\">Extremely fast response times<\/strong> in the picosecond range<\/li>\n<li data-start=\"977\" data-end=\"1050\"><strong data-start=\"977\" data-end=\"1008\">Wide range of applications,<\/strong> even with extremely weak light signals<\/li>\n<li data-start=\"1053\" data-end=\"1138\"><strong data-start=\"1053\" data-end=\"1072\">Reliability<\/strong> through state-of-the-art quenching and noise suppression technologies<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Geiger-mode operation In Geiger-mode operation, an InGaAs avalanche photodiode (APD) is operated above its breakdown voltage. In this state, the absorption of a single photon is sufficient to trigger avalanche multiplication and generate a measurable signal.Detection occurs on a single-photon basis, enabling maximum sensitivity even at very low light levels. A quenching circuit is used&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2548,"menu_order":5,"comment_status":"open","ping_status":"closed","template":"page-products.php","meta":{"footnotes":""},"class_list":["post-2556","page","type-page","status-publish","hentry","entry","no-media"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>InGaAs APD Geiger Mode - OEC GmbH - Optoelektronische Komponenten &amp; Bauteile<\/title>\n<meta name=\"description\" content=\"Optoelektronische Komponenten, Module und Systeme: GaN, InGaAs, Si, Laserdiodenmodule, Optikkomponenten, Photoempf\u00e4nger und mehr.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.oec-gmbh.de\/en\/products\/photodiodes-detectors-sensors\/ingaas-avalanche-photodioden-apds\/ingaas-apd-geiger-mode\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"InGaAs APD Geiger Mode - OEC GmbH - Optoelektronische Komponenten &amp; 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