{"id":2840,"date":"2023-07-04T06:53:21","date_gmt":"2023-07-04T06:53:21","guid":{"rendered":"https:\/\/beamq.com\/laser\/?p=2840"},"modified":"2023-07-04T07:01:11","modified_gmt":"2023-07-04T07:01:11","slug":"aom-for-line-width-measurement","status":"publish","type":"post","link":"https:\/\/beamq.com\/laser\/aom-for-line-width-measurement\/","title":{"rendered":"AOM for Line-width measurement"},"content":{"rendered":"\n<p><a href=\"https:\/\/www.beamq.com\/aom-for-linewidth-measurement-ezp-363.html?chapter=8\">Line-width measurement of DFB laser based on frequency shift delay self-heterodyning method<\/a><\/p>\n\n\n\n<p>In order to measure the line-width of distributed feedback(DFB) diode single mode semiconductor laser, novel optical fiber self-heterodyne measurement scheme based on Mach-Zehnder interference structure was adopted and a set of all fiber time-delay self-heterodyne measurement system was designed. After theoretical analysis, narrow band line-width measurement system with time-delay fiber length of 900m, 3000m and 6000m was set up. A DFB single mode laser source with center wavelength of 1550nm and nominal line-width of 800kHz was tested. The measured line-width values of laser were 951.566kHz, 832.471kHz and 802.221kHz respectively. The designed scheme is verified by simulation. The results show that, compared with the simulation results, narrowband line-width measurement system with the length of 6000m is optimal, and its error is within 3%, which proves the rationality and accuracy of self-heterodyne interference principle. All fiber frequency shift delay self-heterodyne method has advantages and practical value for measuring the line-width of DFB lasers.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Line-width measurement of DFB laser based on frequency shift delay self-heterodyning method In order to measure the line-width of distributed feedback(DFB) diode single mode semiconductor laser, novel optical fiber self-heterodyne measurement scheme based on Mach-Zehnder interference structure was adopted and a set of all fiber time-delay self-heterodyne measurement system was designed. After theoretical analysis, narrow [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2842,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[23],"tags":[72],"_links":{"self":[{"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/posts\/2840"}],"collection":[{"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/comments?post=2840"}],"version-history":[{"count":1,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/posts\/2840\/revisions"}],"predecessor-version":[{"id":2841,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/posts\/2840\/revisions\/2841"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/media\/2842"}],"wp:attachment":[{"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/media?parent=2840"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/categories?post=2840"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/beamq.com\/laser\/wp-json\/wp\/v2\/tags?post=2840"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}