{"id":7227,"date":"2026-10-05T08:14:19","date_gmt":"2026-10-05T08:14:19","guid":{"rendered":"https:\/\/dev95.site\/upgrading-a-benchtop-laser-for-megawatt-power\/"},"modified":"2026-10-05T08:14:19","modified_gmt":"2026-10-05T08:14:19","slug":"upgrading-a-benchtop-laser-for-megawatt-power","status":"publish","type":"post","link":"https:\/\/dev95.site\/ar\/upgrading-a-benchtop-laser-for-megawatt-power\/","title":{"rendered":"Upgrading a Benchtop Laser for Megawatt Power"},"content":{"rendered":"<div id=\"dev95-801595408\" class=\"dev95-- dev95-entity-placement\"><script async=\"async\" data-cfasync=\"false\" src=\"https:\/\/pl27862732.profitableratecpmnetwork.com\/2ad7a50e0bbc23ac6801d7b77c501463\/invoke.js\"><\/script>\r\n<div id=\"container-2ad7a50e0bbc23ac6801d7b77c501463\"><\/div><\/div><div id=\"dev95-2159294794\" class=\"dev95-before-content dev95-entity-placement\"><p style=\"text-align: center;\"><strong>Stop wasting time on dead links! \ud83d\uded1 This smart platform automatically detects your device and country to give you the exact best offer instantly. Check it out now 100% free! \ud83d\udc47<\/strong><br data-sfc-root=\"ep\" data-sfc-pl=\"|||[]\" data-complete=\"true\" data-copy-service-computed-style=\"font-family: Arial, sans-serif, &quot;Noto Color Emoji&quot;; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);\" \/><a href=\"https:\/\/www.profitableratecpmnetwork.com\/pvhx5mbcc?key=ff7d362db3c20bc86fad685cc94f1fc4\">\ud83d\udd17 <strong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-complete=\"true\" aria-owns=\"action-menu-parent-container\" data-copy-service-computed-style=\"font-family: Arial, sans-serif, &quot;Noto Color Emoji&quot;; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);\">[Click here]<\/strong><\/a><\/p>\n<\/div><div>\n<div><img data-recalc-dims=\"1\" width=\"800\" height=\"450\" src=\"https:\/\/i0.wp.com\/hackaday.com\/wp-content\/uploads\/2026\/10\/q-switch_laser_spark.png?resize=800%2C450&#038;ssl=1\" class=\"attachment-large size-large wp-post-image\" alt=\"A dark optical bench is shown, with a lens in the right-hand part of the image. In front of the image, a bright blue spark appears in the air, with no equipment near it.\" style=\"margin: 0 auto; margin-bottom: 15px;\" decoding=\"async\" loading=\"lazy\" srcset=\"https:\/\/hackaday.com\/wp-content\/uploads\/2026\/10\/q-switch_laser_spark.png 1802w, https:\/\/hackaday.com\/wp-content\/uploads\/2026\/10\/q-switch_laser_spark.png?resize=250,141 250w, https:\/\/hackaday.com\/wp-content\/uploads\/2026\/10\/q-switch_laser_spark.png?resize=400,225 400w, https:\/\/hackaday.com\/wp-content\/uploads\/2026\/10\/q-switch_laser_spark.png?resize=800,450 800w, https:\/\/hackaday.com\/wp-content\/uploads\/2026\/10\/q-switch_laser_spark.png?resize=1536,863 1536w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" data-attachment-id=\"1169930\" data-permalink=\"https:\/\/hackaday.com\/2026\/10\/04\/upgrading-a-benchtop-laser-for-megawatt-power\/q-switch_laser_spark\/\" data-orig-file=\"https:\/\/hackaday.com\/wp-content\/uploads\/2026\/10\/q-switch_laser_spark.png\" data-orig-size=\"1802,1013\" data-comments-opened=\"1\" data-image-meta='{\"aperture\":\"0\",\"credit\":\"\",\"camera\":\"\",\"caption\":\"\",\"created_timestamp\":\"0\",\"copyright\":\"\",\"focal_length\":\"0\",\"iso\":\"0\",\"shutter_speed\":\"0\",\"title\":\"\",\"orientation\":\"0\",\"alt\":\"\"}' data-image-title=\"q-switch_laser_spark\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/hackaday.com\/wp-content\/uploads\/2026\/10\/q-switch_laser_spark.png?w=800\"><\/div>\n<p class=\"wp-block-paragraph\">One fascinating thing about a pulsed laser is that, though the average power may be measured in watts or milliwatts, the peak power can easily reach millions of times that. This happens even in normal operation, but as [Les\u2019 Lab] demonstrated, adding a <a href=\"https:\/\/www.youtube.com\/watch?v=h0LF1kq0GEE\" target=\"_blank\">Q-Switch<\/a> can considerably enhance the peak power.<\/p><div id=\"dev95-2334900673\" class=\"dev95- dev95-entity-placement\"><center>\r\n<script>\r\n  atOptions = {\r\n    'key' : '4ba6b6513c00e0ba76511f798ae56401',\r\n    'format' : 'iframe',\r\n    'height' : 50,\r\n    'width' : 320,\r\n    'params' : {}\r\n  };\r\n<\/script>\r\n<script src=\"https:\/\/www.highrevenueformat.com\/4ba6b6513c00e0ba76511f798ae56401\/invoke.js\"><\/script>\r\n\t<\/center><\/div>\n<p>A Q-switch is an optical attenuator; when placed in the laser cavity, it keeps the cavity from reaching resonance. This greatly limits stimulated emission, allowing energy to build up in the chamber as the gain medium becomes increasingly saturated. Eventually, at some energy level, the Q-switch suddenly stops blocking light, and the cavity lases in a very short, powerful pulse. The Q-switch doesn\u2019t increase the energy in a laser shot, but it does release it much more quickly. In this case, [Les] used chromium-doped yttrium aluminum garnet crystals as the Q-switch and compared performance across several different crystals.<\/p>\n<p><span id=\"more-1169720\"><\/span><\/p>\n<p>[Les] used two sensors to measure the laser pulse: a pyroelectric energy sensor and a fast photodiode to measure the pulse\u2019s shape. Without the Q-switch, [Les]\u2019s laser produced a pulse about 150 \u00b5s long, with a total energy of about 137 mJ and a peak power just under one kilowatt. After adding a Q-switch, the pulse dropped to 14 ns, and the peak power rose to 1.3 megawatts, though the total energy dropped to 77 mJ. [Les] also built an absorption meter and used this to compare several Q-switches with different absorptions; in general, greater absorption increased the peak power when the laser did fire, reaching 2.25 MW at 92% absorption. Increased peak power didn\u2019t translate into greater cutting power, though; when aiming at a metal target, the pulse was too short to do much more than ablate the metal\u2019s surface. The energy output was, however, enough to ionize air or shatter glass at the laser\u2019s focal point.<\/p>\n<p>This isn\u2019t the only enhancement [Les] made to his former <a href=\"https:\/\/hackaday.com\/2023\/10\/11\/tattoo-removal-laser-brought-out-of-retirement-for-a-megawatt-of-fun\/\">tattoo-removal laser<\/a>; this builds on a previous upgrade <a href=\"https:\/\/hackaday.com\/2026\/08\/04\/yellow-yag-produces-powerful-pulses-in-les-leftover-laser\/\">to the gain medium<\/a> itself. For more background on why Q-switches work, check out our article on <a href=\"https:\/\/hackaday.com\/2016\/06\/20\/how-lasers-actually-work\/\">laser fundamentals<\/a>.<\/p>\n<p><iframe loading=\"lazy\" title=\"Laser Light So Intense It Shatters Glass from Within\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/h0LF1kq0GEE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<\/div>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_7227\" class=\"pvc_stats total_only  \" data-element-id=\"7227\" style=\"\"><i class=\"pvc-stats-icon large\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/i0.wp.com\/dev95.site\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif?resize=16%2C16&#038;ssl=1\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n<div id=\"dev95-3086317392\" class=\"dev95-after-content dev95-entity-placement\"><p style=\"text-align: center;\"><strong>Finally, a link that actually works for your region and device! \ud83c\udf0d Get instant access to the top exclusive offers tailored just for you right now. Don&#8217;t miss out, click here! \ud83d\udc47<\/strong><br data-sfc-root=\"ep\" data-sfc-pl=\"|||[]\" data-complete=\"true\" data-copy-service-computed-style=\"font-family: Arial, sans-serif, &quot;Noto Color Emoji&quot;; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);\" \/><a href=\"https:\/\/www.profitableratecpmnetwork.com\/uzeja8ahze?key=bc876be53d6ad0ff6370ab8ea030e479\"><strong>\ud83d\udd17 [Click here]<\/strong><\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>One fascinating thing about a pulsed laser is that, though the average power may be measured in watts or milliwatts, the peak power can easily reach millions of times that. This happens even in normal operation, but as [Les\u2019 Lab]<\/p>\n<div class=\"hosteria-entry-more\"><a href=\"https:\/\/dev95.site\/ar\/upgrading-a-benchtop-laser-for-megawatt-power\/\" class=\"no-underline font-light  group-hover:text-primary-800 dark:group-hover:text-primary-300 py-1\">Read more &gt;&gt;&gt;<\/a><\/div>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_7227\" class=\"pvc_stats total_only  \" data-element-id=\"7227\" style=\"\"><i class=\"pvc-stats-icon large\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/dev95.site\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fp_fajr_begins":"","fp_fajr_iqamah":"","fp_dhuhr_begins":"","fp_dhuhr_iqamah":"","fp_asr_begins":"","fp_asr_iqamah":"","fp_maghrib_begins":"","fp_maghrib_iqamah":"","fp_isha_begins":"","fp_isha_iqamah":"","fp_midnight":"","fp_midnight_name":"","fp_sunrise":"","fp_single_prayer_begins_title":"","fp_single_prayer_iqamah_title":"","fp_prayer_times_for_today":"","fp_hijra_date":"","fp_fajr_name":"","fp_dhuhr_name":"","fp_asr_name":"","fp_maghrib_name":"","fp_isha_name":"","fp_sunrise_name":"","fp_currentDate":"","fp_current_time":"","fp_current_title":"","fp_current_location":"","fp_masjid_name":"","fp_prayer_title":"","fp_next_prayer_iqamah_time":"","fp_next_prayer_iqamah_title":"","fp_next_prayer_begins_time":"","fp_next_prayer_begins_title":"","fp_next_prayer_title":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[37],"tags":[],"class_list":["post-7227","post","type-post","status-publish","format-standard","hentry","category-posts"],"a3_pvc":{"activated":true,"total_views":3,"today_views":3},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Upgrading a Benchtop Laser for Megawatt Power - Dev95<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dev95.site\/ar\/upgrading-a-benchtop-laser-for-megawatt-power\/\" \/>\n<meta property=\"og:locale\" content=\"ar_AR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Upgrading a Benchtop Laser for Megawatt Power - Dev95\" \/>\n<meta property=\"og:description\" content=\"One fascinating thing about a pulsed laser is that, though the average power may be measured in watts or milliwatts, the peak power can easily reach millions of times that. 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