{"id":4298,"date":"2025-06-17T00:00:00","date_gmt":"2025-06-17T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/dfb-laser-definition\/"},"modified":"2026-06-22T09:27:11","modified_gmt":"2026-06-22T09:27:11","slug":"dfb-laser-definition","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/el\/glossary\/dfb-laser-definition","title":{"rendered":"\u00bfQu\u00e9 es un l\u00e1ser DFB?"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d76589cf4b2461d80ec5173d4f81a24.webp\" alt=\"What Is DFB Laser\" class=\"wp-image-4295\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d76589cf4b2461d80ec5173d4f81a24.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d76589cf4b2461d80ec5173d4f81a24-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d76589cf4b2461d80ec5173d4f81a24-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d76589cf4b2461d80ec5173d4f81a24-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d76589cf4b2461d80ec5173d4f81a24-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><span>En el campo de las comunicaciones por fibra \u00f3ptica, <strong>los l\u00e1seres de diodo<\/strong> est\u00e1n en el coraz\u00f3n de todo transmisor \u00f3ptico. Entre ellos, el <strong>l\u00e1ser de retroalimentaci\u00f3n distribuida (DFB)<\/strong> destaca por su alto rendimiento, estabilidad y adecuaci\u00f3n para enlaces \u00f3pticos de larga distancia y alta velocidad. Este blog explora <strong>qu\u00e9 es un l\u00e1ser DFB<\/strong>, su <strong>principio de funcionamiento<\/strong>, su <strong>ventajas<\/strong>, y c\u00f3mo se compara con <strong>l\u00e1seres Fabry\u2013P\u00e9rot (FP)<\/strong>, y <strong>l\u00e1seres VCSEL<\/strong>.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><span>\ud83d\udd0d Definici\u00f3n del l\u00e1ser DFB<\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><span>A <strong>L\u00e1ser DFB (L\u00e1ser de retroalimentaci\u00f3n distribuida)<\/strong> es un tipo de <strong>l\u00e1ser de diodo semiconductor<\/strong> en el que una <strong>estructura peri\u00f3dica<\/strong> (denominada <strong>rejilla de Bragg<\/strong>) se integra directamente en la regi\u00f3n activa del l\u00e1ser. Esta rejilla proporciona <strong>retroalimentaci\u00f3n \u00f3ptica distribuida<\/strong>, lo que permite que el dispositivo emita luz a una <strong>\u00fanica longitud de onda<\/strong> con <strong>alta pureza espectral<\/strong>.<\/span><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><span>A diferencia de los l\u00e1seres Fabry\u2013P\u00e9rot, que dependen de espejos extremos para la retroalimentaci\u00f3n y emiten m\u00faltiples longitudes de onda (multimodo), los l\u00e1seres DFB suprimen los modos laterales y ofrecen una <strong>salida de un solo modo con anchura de l\u00ednea estrecha<\/strong>.<\/span><\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83e\udde9 Componentes clave de un l\u00e1ser DFB<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Regi\u00f3n activa:<\/strong> El medio de ganancia semiconductor donde ocurre la emisi\u00f3n estimulada.<\/p><\/li><li><p><strong>Rejilla de Bragg:<\/strong> Una estructura peri\u00f3dica dentro de la regi\u00f3n activa que refleja longitudes de onda espec\u00edficas, imponiendo la operaci\u00f3n en un solo modo.<\/p><\/li><li><p><strong>Estructura de desfase de fase:<\/strong> Con frecuencia se introduce un desfase de \u03bb\/4 para estabilizar a\u00fan m\u00e1s la salida en un solo modo.<\/p><\/li><li><p><strong>Recubrimientos de facetas:<\/strong> Un extremo suele tener un recubrimiento antirreflejo (AR), mientras que el otro tiene un recubrimiento de alta reflexi\u00f3n (HR) para optimizar la salida y la retroalimentaci\u00f3n.<\/p><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/59344372e19640c6be82667e3a2841d7.webp\" alt=\"Distributed Feedback Laser\" class=\"wp-image-4296\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/59344372e19640c6be82667e3a2841d7.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/59344372e19640c6be82667e3a2841d7-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/59344372e19640c6be82667e3a2841d7-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/59344372e19640c6be82667e3a2841d7-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/59344372e19640c6be82667e3a2841d7-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\u2699\ufe0f \u00bfC\u00f3mo funciona un l\u00e1ser DFB?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El principio de funcionamiento de un l\u00e1ser DFB se basa en la <strong>reflexi\u00f3n de Bragg<\/strong>. As\u00ed es como funciona:<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>Inyecci\u00f3n de corriente<\/strong> en la regi\u00f3n activa excita electrones y huecos.<\/p><\/li><li><p>Su recombinaci\u00f3n genera fotones (luz).<\/p><\/li><li><p>A <strong>rejilla de Bragg<\/strong>\u2014un cambio peri\u00f3dico en el \u00edndice de refracci\u00f3n\u2014 est\u00e1 integrado en la regi\u00f3n activa.<\/p><\/li><li><p>La rejilla refleja \u00fanicamente una longitud de onda espec\u00edfica (la longitud de onda de Bragg), formando una <strong>onda estacionaria<\/strong>.<\/p><\/li><li><p>Esto provoca <strong>interferencia constructiva<\/strong> a la longitud de onda deseada, reforzando un modo longitudinal y suprimiendo los dem\u00e1s.<\/p><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83c\udd9a Comparaci\u00f3n con otros tipos de l\u00e1seres<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >DFB frente a FP frente a VCSEL: diferencias clave<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Caracter\u00edstica \/ Tipo de l\u00e1ser<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>L\u00e1ser FP<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>L\u00e1ser DFB<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>l\u00e1ser VCSEL.<\/strong><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Direcci\u00f3n de emisi\u00f3n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Lateral<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Lateral<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Vertical<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Anchura de l\u00ednea espectral<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ancha<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Muy estrecha<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Moderado<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Estabilidad de longitud de onda<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Pobre<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Excelente<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Buena<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Velocidad de modulaci\u00f3n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Medio<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u03a5\u03c8\u03b7\u03bb\u03cc<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u03a5\u03c8\u03b7\u03bb\u03cc<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Control de modo<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Monomodo<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Monomodo<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Multimodo<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Tipo de fibra<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SMF<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SMF<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>MMF<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Longitudes de onda t\u00edpicas<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~1310 nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1270\u20131610 nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~850 nm<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Aplicaci\u00f3n t\u00edpica<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Aplicaciones heredadas, enlaces de media-corta distancia<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Centros de datos, WDM, telecomunicaciones<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00f3dulos de corta distancia y bajo costo<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>\u039a\u03cc\u03c3\u03c4\u03bf\u03c2<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u03a7\u03b1\u03bc\u03b7\u03bb\u03cc<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Media\u2013Alta<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u03a7\u03b1\u03bc\u03b7\u03bb\u03cc<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udcc8 \u00bfPor qu\u00e9 se utilizan los l\u00e1seres DFB en los transmisores \u00f3pticos?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Los l\u00e1seres DFB se usan ampliamente en <strong>Transceptores \u00f3pticos<\/strong> por varias razones clave:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Caracter\u00edstica<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Beneficio para los transmisores \u00f3pticos<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Estabilidad de longitud de onda<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p\/><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Anchura de l\u00ednea estrecha<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Permite modulaci\u00f3n de alta velocidad y baja dispersi\u00f3n<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Salida en un solo modo<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Reduce la interferencia y la diafon\u00eda en redes densas<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Baja variaci\u00f3n de frecuencia (chirp)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Mantiene la integridad de la se\u00f1al durante recorridos largos por fibra<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Salida sintonizable<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u00datil para el espaciado de canales en sistemas WDM<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd17 \u00bfBusca transceptores \u00f3pticos con l\u00e1ser DFB?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u03a3\u03c4\u03b7\u03bd <strong>LINK-PP<\/strong>, ofrecemos una gama completa de m\u00f3dulos \u00f3pticos impulsados por l\u00e1seres DFB, tales como:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/483196.htm\"><strong>LS-CW6110-10C:<\/strong><\/a><strong> Transceptor CWDM SFP+ de 10 G para 40 km<\/strong><\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/483080.htm\"><strong>LS-CW5910-10C<\/strong><\/a><strong>: <\/strong>Transceptor \u00f3ptico de 10 G para fibra monomodo con DOM<\/p><\/li><li><p>M\u00f3dulos OEM personalizados para aplicaciones CPRI\/eCPRI<\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Los transceptores l\u00e1ser DFB LINK-PP son totalmente compatibles con las principales marcas y cumplen rigurosos est\u00e1ndares de telecomunicaciones.<\/p><\/blockquote>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup\/><tbody><tr\/><\/tbody>\n<\/table>\n<\/figure>","protected":false},"excerpt":{"rendered":"<p>\u039c\u03ac\u03b8\u03b5\u03c4\u03b5 \u03c4\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03bb\u03ad\u03b9\u03b6\u03b5\u03c1 DFB (Distributed Feedback Laser), \u03c4\u03b7\u03bd \u03b1\u03c1\u03c7\u03ae \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5, \u03c4\u03b7 \u03b4\u03bf\u03bc\u03ae \u03c4\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03ad\u03c2 \u03c4\u03bf\u03c5 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03bb\u03ad\u03b9\u03b6\u03b5\u03c1 FP \u03ba\u03b1\u03b9 VCSEL.<\/p>","protected":false},"author":1,"featured_media":4297,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[26],"class_list":["post-4298","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/el\/wp-json\/wp\/v2\/posts\/4298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/el\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/el\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/el\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/el\/wp-json\/wp\/v2\/comments?post=4298"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/el\/wp-json\/wp\/v2\/posts\/4298\/revisions"}],"predecessor-version":[{"id":11460,"href":"https:\/\/resourceslp.szlogic.cn\/el\/wp-json\/wp\/v2\/posts\/4298\/revisions\/11460"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/el\/wp-json\/wp\/v2\/media\/4297"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/el\/wp-json\/wp\/v2\/media?parent=4298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/el\/wp-json\/wp\/v2\/categories?post=4298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/el\/wp-json\/wp\/v2\/tags?post=4298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}