{"id":2706,"date":"2023-01-17T06:36:49","date_gmt":"2023-01-16T22:36:49","guid":{"rendered":"https:\/\/comblaser.phy.ncu.edu.tw\/?page_id=2706"},"modified":"2023-03-15T15:39:39","modified_gmt":"2023-03-15T07:39:39","slug":"comblaser-brief-english","status":"publish","type":"page","link":"https:\/\/comblaser.phy.ncu.edu.tw\/index.php\/comblaser-brief-english\/","title":{"rendered":"Comblaser brief english"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2706\" class=\"elementor elementor-2706\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-38a3ec12 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"38a3ec12\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-21938962\" data-id=\"21938962\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-34aa7bd4 elementor-widget elementor-widget-text-editor\" data-id=\"34aa7bd4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><\/p>\n<h2 class=\"wp-block-heading\">Introduction to Self-reference Comb Laser<\/h2>\n<p><\/p>\n<p><\/p>\n<p><\/p>\n<figure><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-3412 size-full\" src=\"https:\/\/comblaser.phy.ncu.edu.tw\/wp-content\/uploads\/2023\/03\/fig1.png\" alt=\"\" width=\"1652\" height=\"900\" srcset=\"https:\/\/comblaser.phy.ncu.edu.tw\/wp-content\/uploads\/2023\/03\/fig1.png 1652w, https:\/\/comblaser.phy.ncu.edu.tw\/wp-content\/uploads\/2023\/03\/fig1-300x163.png 300w, https:\/\/comblaser.phy.ncu.edu.tw\/wp-content\/uploads\/2023\/03\/fig1-1024x558.png 1024w, https:\/\/comblaser.phy.ncu.edu.tw\/wp-content\/uploads\/2023\/03\/fig1-768x418.png 768w, https:\/\/comblaser.phy.ncu.edu.tw\/wp-content\/uploads\/2023\/03\/fig1-1536x837.png 1536w\" sizes=\"(max-width: 1652px) 100vw, 1652px\" \/><\/figure>\n<p><\/p>\n<p><\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/comblaser.phy.ncu.edu.tw\/wp-content\/uploads\/2023\/01\/2-1024x533.png\" alt=\"\"><\/figure>\n<p><\/p>\n<p><\/p>\n<p><\/p>\n<p><\/p>\n<p>A comb laser is a type of laser that generates a series of evenly spaced optical frequencies. It is called a &#8220;comb&#8221; because the resulting spectrum resembles the teeth of a comb.&nbsp;<span style=\"font-size: 0.875rem;\">The gain medium of our self-reference mode-locked frequency comb laser is Ti:sapphire crystal. Experimentally the Ti:sapphire crystal absorbs 532 nm green light from Verdi laser and emits infrared light at about 800 nm.&nbsp;<\/span><\/p>\n<p><span style=\"font-size: 0.875rem;\">The frequency domain representation of a frequency comb is a series of delta functions spaced according to f=mfrep+fceo, where m is an integer, frep is the repetition rate of the mode-locked laser, fceo is the carrier-envelope offset frequency.<\/span><\/p>\n<p>Fig.1 shows a self-referencing technique (f-2f technique) which is used to measure the carrier-envelope offset frequency. A supercontinuum fiber extends the spectrum range to the wavelength of 1064 nm and 532 nm (which is shown in Fig.2). Light at the higher-wavelength side of the broadened spectrum is doubled using second-harmonic generation in a nonlinear crystal (LBO). To measure the beat signal, in additional to allowing two beams to coincide in space, coincide in time is also needed. Thus, a translation stage is required to adjust the delay of one of the pulses.<\/p>\n<p><\/p>\n<p>One important application of comb lasers is in optical frequency metrology, where they are used to generate a precise and stable series of optical frequencies that can be used as a reference for measuring the frequency of other lasers or atomic transitions. Comb lasers have also found applications in high-speed communication, spectroscopy, and other fields.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Introduction to Self-reference &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2706","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/comblaser.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/pages\/2706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/comblaser.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/comblaser.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/comblaser.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/comblaser.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/comments?post=2706"}],"version-history":[{"count":8,"href":"https:\/\/comblaser.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/pages\/2706\/revisions"}],"predecessor-version":[{"id":3418,"href":"https:\/\/comblaser.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/pages\/2706\/revisions\/3418"}],"wp:attachment":[{"href":"https:\/\/comblaser.phy.ncu.edu.tw\/index.php\/wp-json\/wp\/v2\/media?parent=2706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}