{"id":14698,"date":"2020-08-23T04:48:26","date_gmt":"2020-08-23T04:48:26","guid":{"rendered":"https:\/\/www.tarluz.com\/?p=14698"},"modified":"2020-09-01T12:55:50","modified_gmt":"2020-09-01T12:55:50","slug":"takeaways-and-conclusion-for-pon-netowork","status":"publish","type":"post","link":"https:\/\/www.tarluz.com\/ar\/ftth\/takeaways-and-conclusion-for-pon-netowork\/","title":{"rendered":"Takeaways and Conclusion for PON Network"},"content":{"rendered":"<ul>\n<li>Optical link budgets \u2013 Vary by ODN class and PON type. However, 29 dB is often used as a \u201cloose\u201d loss budget for both XGS-PON and NG-PON2 for Class N1\/N2 applications. This reasonably healthy link budget can be adversely affected by bending losses at NG- PON downstream lambdas.<\/li>\n<li>Spectral losses \u2013 XGS-PON (1270 nm) upstream signal will have a much higher loss due to fiber attenuation compared to other PON services, especially older fibers that are not optimized for full-spectrum operation.<\/li>\n<li>Existing GPON splitters \u2013 Need to have a wide operating wavelength range (1260 nm to 1650 nm0 splitters (U-Grade) to not affect NG-PON wavelengths and cause additional insertion loss.<\/li>\n<li>Co-existence elements \u2013 Additional loss needs to be considered in the overall link budget.<br \/>\nAs a rule of thumb, factor \u00b1 0.8-dB loss for GPON, \u00b1 1.4-dB for XGS-PON, and \u00b1 1.1-dB loss for NG-PON2 TWDM (excludes WM1 mux).<\/li>\n<li>Test equipment<br \/>\n\u203a \u00a0Optical light source (OLS) and optical power meter (OPM) \u2013 Good for verifying insertion loss at the PON operating wavelengths. A specialized NG-PON OLS can be connected at the co-existence (CEx) filter, and an OPM calibrated at the specific PON wavelengths is used to verify the total insertion loss.<br \/>\n\u203a \u00a0OTDR \u2013 Ideal for detecting and locating bends in a xPON fiber. Historically, 1310- nm and 1550-nm wavelengths have been used to detect bending in GPON and other applications. However, 1625-nm or 1650-nm wavelengths are often used to check \u201cworst case\u201d scenario for NG-PON2 (TWDM and P-to-P) downstream signals operating in\u2028the L-band; this also holds true for DWDM L-Band systems that might be used in the xPON backhaul segment. A CWDM OTDR is useful to simulate and characterize attenuation in PON systems since several wavelengths per the ITU-T G.694.2 CWDM grid are very close to the PON operating wavelengths. For new co-existence PON systems, the following ODN parameters can be re-verified using a purpose-built OTDR:<br \/>\n&#8211; \u00a0Total insertion loss of the link<br \/>\n&#8211; \u00a0Total optical return loss of the link<br \/>\n&#8211; \u00a0Loss of discrete events (splice, connector)<br \/>\n&#8211; \u00a0Reflectance of any discrete event (splice, connector)<br \/>\n&#8211; \u00a0Potential micro and macro bends.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Source from Lightwaveonline: Can Your ODN Handle NG-PON?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Optical link budgets \u2013 Vary by ODN class and PON type. However, 29 dB is often used as a \u201cloose\u201d loss budget for both XGS-PON and NG-PON2 for Class N1\/N2 applications. This reasonably healthy link budget can be adversely affected by bending losses at NG- PON downstream lambdas. Spectral losses \u2013 XGS-PON (1270 nm) upstream [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":14707,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[],"class_list":["post-14698","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ftth"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Takeaways and Conclusion for PON Network - TARLUZ - FIBER OPTIC SUPPLIERS<\/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:\/\/www.tarluz.com\/ar\/ftth\/takeaways-and-conclusion-for-pon-netowork\/\" \/>\n<meta property=\"og:locale\" content=\"ar_AR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Takeaways and Conclusion for PON Network\" \/>\n<meta property=\"og:description\" content=\"Optical link budgets \u2013 Vary by ODN class and PON type. 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