{"id":106,"date":"2013-03-15T16:07:48","date_gmt":"2013-03-15T16:07:48","guid":{"rendered":"http:\/\/www.dkphotonics.com\/blog\/?p=106"},"modified":"2013-03-18T17:23:09","modified_gmt":"2013-03-18T17:23:09","slug":"things-you-should-know-about-filter-wdm","status":"publish","type":"post","link":"https:\/\/www.dkphotonics.com\/blog\/things-you-should-know-about-filter-wdm\/","title":{"rendered":"Things You Should Know About Filter WDM"},"content":{"rendered":"<p>Wavelength-division multiplexing (WDM) is overtaking since the leading technology in point-to-point transmission links. One key method is a tunable optical filter. Important features of this type of filter include low insertion loss, narrow bandwidth, high sidelobe suppression, large dynamic range, fast tuning speed, a simple control mechanism, small size, and expense effectiveness. <a href=\"http:\/\/www.dkphotonics.com\/product\/Filter-based-WDM.html\">Filter WDM<\/a> module will depend on Thin Film Filter (TFF) technology. The FWDM is extensively found in EDFA, Raman amplifiers, WDM networks and fiber optics instrumentation. The unit combines or separates light at different wavelengths in the wide wavelength range. Since FWDM series offer minimal insertion loss, low polarization dependence, high isolation and excellent environmental stability, perfect for very fast WDM network systems. It really is traditionally used in optical fiber systems:1310\/1550nm, 1480\/1550nm, 850\/1310nm, <a href=\"http:\/\/www.dkphotonics.com\/product\/980-1550nm-Filter-WDM.html\">980\/1550nm<\/a> and 1310\/1490\/1550nm.<\/p>\n<p>FWDM Main Features:<\/p>\n<ul>\n<li>\u00a0Wide Operating Wavelength Range;<\/li>\n<li>\u00a0Low Insertion Loss;<\/li>\n<li>\u00a0Ultra Flat Wide Passband;<\/li>\n<li>\u00a0High Channel Isolation;<\/li>\n<li>\u00a0High Stability and reliability;<\/li>\n<li>\u00a0Epoxy-free on Optical Path.<\/li>\n<li>\u00a0FWDM Applications:<\/li>\n<li>\u00a0Testing Instruments;<\/li>\n<li>\u00a0FTTH Tri-Play System.<\/li>\n<\/ul>\n<p><a href=\"http:\/\/www.dkphotonics.com\/product\/WDM-Products.html\">WDM<\/a> is a method of combining multiple signals on lasers at various infared (IR) wavelengths for transmission along fiber optic media. Each laser is modulated by an impartial pair of signals. Wavelength-sensitive filters, the IR analog of visible-light color filters, are employed on the receiving end.<\/p>\n<p>WDM is comparable to frequency-division multiplexing (FDM). But rather than going on at radio frequencies (RF), WDM is done inside the IR element of the electromagnetic (EM) spectrum. Each IR channel carries several RF signals combined by using FDM or time-division multiplexing (TDM). Each multiplexed IR channel is separated, or demultiplexed, in the original signals with the destination.<\/p>\n<p>The usage of WDM can multiply the effective bandwidth of an fiber optic communications system with a large factor. However its cost should be compared to the choice of utilizing multiple fibers bundled in to a cable. A fiber optic repeater device referred to as erbium amplifier plans to make WDM a cost-effective long-term treatment for the bandwidth exhaustion problem.<\/p>\n<p>DK Photonics offers a wide selection of WDM\/CWDM\/DWDM devices, like CWDM Mux\/Demux, CWDM OADM, DWDM Mux\/Demux, DWDM OADM, Filter WDM and so on. DK Photonics 1310\/1490\/1550 WDM devices based on thin-film filter technology are design to address the precise requirements from the FTTP market. Strong coating and passive device packaging capabilities feature these WDMs with excellent optical performance, good reliability and ultra-compact size.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Wavelength-division multiplexing (WDM) is overtaking since the leading technology in point-to-point transmission links. One key method is a tunable optical filter. Important features of this type of filter include low insertion loss, narrow bandwidth, high sidelobe suppression, large dynamic range, fast tuning speed, a simple control mechanism, small size, and expense effectiveness. Filter WDM module &hellip; <a href=\"https:\/\/www.dkphotonics.com\/blog\/things-you-should-know-about-filter-wdm\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Things You Should Know About Filter WDM<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,112,16,7],"tags":[111,9,12,109,113,13,110],"class_list":["post-106","post","type-post","status-publish","format-standard","hentry","category-cwdm","category-dwdm","category-fwdm","category-wdm","tag-cwdm","tag-dwdm","tag-fiber-optica-connector","tag-fttx","tag-fwdm","tag-optical-fiber-communication","tag-wdm"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Things You Should Know About Filter WDM<\/title>\n<meta name=\"description\" content=\"FWDM traditionally used in 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