{"id":335,"date":"2014-06-26T09:54:05","date_gmt":"2014-06-26T09:54:05","guid":{"rendered":"http:\/\/www.dkphotonics.com\/blog\/?p=335"},"modified":"2014-06-26T09:54:05","modified_gmt":"2014-06-26T09:54:05","slug":"can-wdm-pon-go-next-dk-photonics","status":"publish","type":"post","link":"https:\/\/www.dkphotonics.com\/blog\/can-wdm-pon-go-next-dk-photonics\/","title":{"rendered":"Where can WDM-PON go next? — DK Photonics"},"content":{"rendered":"

Where\u00a0can\u00a0WDM-PON\u00a0go\u00a0next?<\/b><\/p>\n

The\u00a0current\u00a0generation\u00a0of\u00a0commercial\u00a0WDM-PON\/\u00a0100GHz\u00a0DWDM\u00a0systems<\/a>\u00a0based\u00a0on\u00a0reflective\u00a0ONU\u00a0technology\u00a0is\u00a0optimized\u00a0for\u00a0applications\u00a0up\u00a0to\u00a020\u00a0km,\u00a040\u00a0channels,\u00a0and\u00a01\u00a0Gbps\u00a0per\u00a0customer.\u00a0Current\u00a0research\u00a0focuses\u00a0on\u00a0how\u00a0to\u00a0scale\u00a0WDM-PON\u00a0toward\u00a0higher\u00a0bit\u00a0rates\u00a0and\u00a0longer\u00a0reach.\u00a0Forward\u00a0error\u00a0correction\u00a0is\u00a0a\u00a0key\u00a0technology\u00a0for\u00a0scaling\u00a0the\u00a0current\u00a0generation\u00a0of\u00a0WDM-PON\u00a0technology\u00a0to\u00a0higher\u00a0bit\u00a0rates,\u00a0longer\u00a0reach,\u00a0tighter\u00a0channel\u00a0spacing,\u00a0or\u00a0a\u00a0combination\u00a0thereof.\u00a0An\u00a0important\u00a0challenge\u00a0is\u00a0to\u00a0package\u00a0the\u00a0technology\u00a0in\u00a0an\u00a0MSA\u00a0form-factor\u00a0pluggable\u00a0module\u00a0to\u00a0maintain\u00a0its\u00a0benefits\u00a0in\u00a0cost\u00a0and\u00a0compatibility\u00a0with\u00a0third-party\u00a0equipment.<\/div>\n
A\u00a0typical\u00a0requirement\u00a0for\u00a0next\u00a0generation\u00a0metro\/access\u00a0systems\u00a0is\u00a0to\u00a0enable\u00a0node\u00a0consolidation.\u00a0That\u00a0means\u00a0operators\u00a0can\u00a0reduce\u00a0opex\u00a0by\u00a0closing\u00a0down\u00a0portions\u00a0of\u00a0their\u00a0central\u00a0offices;\u00a0at\u00a0the\u00a0same\u00a0time,\u00a0this\u00a0goal\u00a0requires\u00a0the\u00a0optical\u00a0signals\u00a0to\u00a0bridge\u00a0longer\u00a0distances\u00a0than\u00a0what\u00a0is\u00a0typical\u00a0of\u00a0the\u00a0access\u00a0networks\u00a0of\u00a0today.\u00a0Thus,\u00a0when\u00a0routing\u00a0WDM-PON\u00a0\/\u00a01064nm\u00a0high\u00a0power\u00a0isolator\u00a0<\/a>signals\u00a0through\u00a0the\u00a0metro\u00a0part\u00a0of\u00a0the\u00a0network,\u00a0it\u00a0becomes\u00a0necessary\u00a0to\u00a0support\u00a0ring\u00a0architectures\u00a0as\u00a0an\u00a0alternative\u00a0to\u00a0the\u00a0basic\u00a0tree\u00a0structure.<\/div>\n
In\u00a0a\u00a0ring\u00a0structure,\u00a0cascaded\u00a0filters\u00a0may\u00a0decrease\u00a0the\u00a0effective\u00a0channel\u00a0passband.\u00a0Since\u00a0the\u00a0spectral\u00a0width\u00a0of\u00a0the\u00a0WDM-PON\u00a0signal\u00a0is\u00a0wider\u00a0than\u00a0the\u00a0signals\u00a0from\u00a0a\u00a0normal\u00a0DFB\u00a0source,\u00a0such\u00a0filtering\u00a0effects\u00a0may\u00a0affect\u00a0transmission.<\/div>\n
In\u00a0a\u00a0recent\u00a0evaluation\u00a0project,\u00a0a\u00a0partnership\u00a0between\u00a0Transmode\u00a0and\u00a0Deutsche\u00a0Telekom\u00a0Hochschule\u00a0f\u00fcr\u00a0Telekommunikation\u00a0of\u00a0Leipzig,\u00a0Germany,\u00a0achieved\u00a0140-km\u00a0long\u00a0reach\u00a0WDM-PON\u00a0transmission\u00a0over\u00a0a\u00a0ring-based\u00a0access-network\u00a0architecture.\u00a0The\u00a0partnership\u00a0investigated\u00a0the\u00a0effects\u00a0of\u00a0using\u00a0WDM-PON\u00a0based\u00a0on\u00a0ASE-seeded\u00a0wavelength-locked\u00a0transmitters\u00a0in\u00a0a\u00a0ring-based\u00a0network\u00a0architecture\u00a0with\u00a0cascaded\u00a0CWDM\u00a0OADM<\/a>\u00a0nodes.\u00a0Transmission\u00a0at\u00a01.25\u00a0Gbps\u00a0over\u00a0140-km\u00a0singlemode\u00a0fiber\u00a0was\u00a0demonstrated\u00a0using\u00a0an\u00a0EDFA\u00a0and\u00a0dispersion\u00a0compensation.<\/div>\n
The\u00a0results\u00a0were\u00a0first\u00a0published\u00a0at\u00a0ECOC\u00a02013\u00a0(In\u00a0de\u00a0Betou,\u00a0Bunge,\u00a0\u00c5hlfeldt,\u00a0and\u00a0Olson,\u00a0“140km\u00a0Long-reach\u00a0WDM-PON\u00a0Test\u00a0for\u00a0Ring-based\u00a0Access\u00a0Network\u00a0Architecture”).\u00a0This\u00a0partnership\u00a0has\u00a0investigated\u00a0what\u00a0opportunities\u00a0could\u00a0be\u00a0provided\u00a0by\u00a0WDM-PON\u00a0technology\u00a0in\u00a0such\u00a0network\u00a0topologies\u00a0by\u00a0studying\u00a0experimentally\u00a0the\u00a0influence\u00a0of\u00a0narrow\u00a0filtering\u00a0and\u00a0maximum\u00a0reach.<\/div>\n
The\u00a0experimental\u00a0testbed\u00a0(in\u00a0Leipzig)\u00a0was\u00a0built\u00a0around\u00a0Transmode’s\u00a0TM-Series\u00a0iWDM-PON\u00a0system\u00a0to\u00a0create\u00a0an\u00a0optical\u00a0line\u00a0terminal<\/a>\u00a0(OLT)\u00a0(see\u00a0Figure\u00a02).\u00a0The\u00a0OLT\u00a0has\u00a0a\u00a0transponder\u00a0line\u00a0card\u00a0that\u00a0hosts\u00a0pluggable\u00a0wavelength-locked\u00a0Fabry-Perot\u00a0transceivers,\u00a0ASE\u00a0seed\u00a0light\u00a0sources,\u00a0dual\u00a0circulators\u00a0for\u00a0up-\u00a0and\u00a0downstream,\u00a0and\u00a0a\u00a040-channel\u00a0multiplexer\u00a0based\u00a0on\u00a0an\u00a0AWG.<\/div>\n
To\u00a0reach\u00a0distances\u00a0beyond\u00a0100\u00a0km,\u00a0amplifiers<\/a>\u00a0dispersion\u00a0compensation,\u00a0and\u00a0remote\u00a0ASE\u00a0seed\u00a0sources\u00a0were\u00a0used.\u00a0While\u00a0an\u00a0experimental\u00a0field\u00a0trial\u00a0today,\u00a0it\u00a0shows\u00a0that\u00a0WDM-PON\u00a0may\u00a0well\u00a0continue\u00a0to\u00a0evolve\u00a0to\u00a0support\u00a0longer\u00a0reach\u00a0and\u00a0more\u00a0sophisticated\u00a0network\u00a0architectures\u00a0in\u00a0the\u00a0future\u00a0supporting\u00a0a\u00a0broader\u00a0range\u00a0of\u00a0deployment\u00a0scenarios.<\/div>\n
<\/div>\n
DK\u00a0Photonics\u00a0\u2013\u00a0www.dkphotonics.com\u00a0specializes\u00a0in\u00a0designing\u00a0and\u00a0manufacturing\u00a0of\u00a0high\u00a0quality\u00a0optical\u00a0passive\u00a0components\u00a0mainly\u00a0for\u00a0telecommunication,\u00a0fiber\u00a0sensor\u00a0and\u00a0fiber\u00a0laser\u00a0applications,such\u00a0as\u00a0High\u00a0Power\u00a0Isolator,1064nm\u00a0Components,PM\u00a0Components,Pump\u00a0Combiner,Pump\u00a0Laser\u00a0Protector,which\u00a0using\u00a0for\u00a0fiber\u00a0laser\u00a0applications.Also\u00a0have\u00a0Mini-size\u00a0CWDM,\u00a0Optical\u00a0Circulator<\/a>,\u00a0PM\u00a0Circulator,PM\u00a0Isolator,\u00a0Fused\u00a0Coupler,Mini\u00a0Size\u00a0Fused\u00a0WDM.More\u00a0information,please\u00a0contact\u00a0us.<\/div>\n","protected":false},"excerpt":{"rendered":"

Where\u00a0can\u00a0WDM-PON\u00a0go\u00a0next? The\u00a0current\u00a0generation\u00a0of\u00a0commercial\u00a0WDM-PON\/\u00a0100GHz\u00a0DWDM\u00a0systems\u00a0based\u00a0on\u00a0reflective\u00a0ONU\u00a0technology\u00a0is\u00a0optimized\u00a0for\u00a0applications\u00a0up\u00a0to\u00a020\u00a0km,\u00a040\u00a0channels,\u00a0and\u00a01\u00a0Gbps\u00a0per\u00a0customer.\u00a0Current\u00a0research\u00a0focuses\u00a0on\u00a0how\u00a0to\u00a0scale\u00a0WDM-PON\u00a0toward\u00a0higher\u00a0bit\u00a0rates\u00a0and\u00a0longer\u00a0reach.\u00a0Forward\u00a0error\u00a0correction\u00a0is\u00a0a\u00a0key\u00a0technology\u00a0for\u00a0scaling\u00a0the\u00a0current\u00a0generation\u00a0of\u00a0WDM-PON\u00a0technology\u00a0to\u00a0higher\u00a0bit\u00a0rates,\u00a0longer\u00a0reach,\u00a0tighter\u00a0channel\u00a0spacing,\u00a0or\u00a0a\u00a0combination\u00a0thereof.\u00a0An\u00a0important\u00a0challenge\u00a0is\u00a0to\u00a0package\u00a0the\u00a0technology\u00a0in\u00a0an\u00a0MSA\u00a0form-factor\u00a0pluggable\u00a0module\u00a0to\u00a0maintain\u00a0its\u00a0benefits\u00a0in\u00a0cost\u00a0and\u00a0compatibility\u00a0with\u00a0third-party\u00a0equipment. A\u00a0typical\u00a0requirement\u00a0for\u00a0next\u00a0generation\u00a0metro\/access\u00a0systems\u00a0is\u00a0to\u00a0enable\u00a0node\u00a0consolidation.\u00a0That\u00a0means\u00a0operators\u00a0can\u00a0reduce\u00a0opex\u00a0by\u00a0closing\u00a0down\u00a0portions\u00a0of\u00a0their\u00a0central\u00a0offices;\u00a0at\u00a0the\u00a0same\u00a0time,\u00a0this\u00a0goal\u00a0requires\u00a0the\u00a0optical\u00a0signals\u00a0to\u00a0bridge\u00a0longer\u00a0distances\u00a0than\u00a0what\u00a0is\u00a0typical\u00a0of\u00a0the\u00a0access\u00a0networks\u00a0of\u00a0today.\u00a0Thus,\u00a0when\u00a0routing\u00a0WDM-PON\u00a0\/\u00a01064nm\u00a0high\u00a0power\u00a0isolator\u00a0signals\u00a0through\u00a0the\u00a0metro\u00a0part\u00a0of\u00a0the\u00a0network,\u00a0it\u00a0becomes\u00a0necessary\u00a0to\u00a0support\u00a0ring\u00a0architectures\u00a0as\u00a0an\u00a0alternative\u00a0to\u00a0the\u00a0basic\u00a0tree\u00a0structure. In\u00a0a\u00a0ring\u00a0structure,\u00a0cascaded\u00a0filters\u00a0may\u00a0decrease\u00a0the\u00a0effective\u00a0channel\u00a0passband.\u00a0Since\u00a0the\u00a0spectral\u00a0width\u00a0of\u00a0the\u00a0WDM-PON\u00a0signal\u00a0is\u00a0wider\u00a0than\u00a0the\u00a0signals\u00a0from\u00a0a\u00a0normal\u00a0DFB\u00a0source,\u00a0such\u00a0filtering\u00a0effects\u00a0may\u00a0affect\u00a0transmission. In\u00a0a\u00a0recent\u00a0evaluation\u00a0project,\u00a0a\u00a0partnership\u00a0between\u00a0Transmode\u00a0and\u00a0Deutsche\u00a0Telekom\u00a0Hochschule\u00a0f\u00fcr\u00a0Telekommunikation\u00a0of\u00a0Leipzig,\u00a0Germany,\u00a0achieved\u00a0140-km\u00a0long\u00a0reach\u00a0WDM-PON\u00a0transmission\u00a0over\u00a0a\u00a0ring-based\u00a0access-network\u00a0architecture.\u00a0The\u00a0partnership\u00a0investigated\u00a0the\u00a0effects\u00a0of\u00a0using\u00a0WDM-PON\u00a0based\u00a0on\u00a0ASE-seeded\u00a0wavelength-locked\u00a0transmitters\u00a0in\u00a0a\u00a0ring-based\u00a0network\u00a0architecture\u00a0with\u00a0cascaded\u00a0CWDM\u00a0OADM\u00a0nodes.\u00a0Transmission\u00a0at\u00a01.25\u00a0Gbps\u00a0over\u00a0140-km\u00a0singlemode\u00a0fiber\u00a0was\u00a0demonstrated\u00a0using\u00a0an\u00a0EDFA\u00a0and\u00a0dispersion\u00a0compensation. The\u00a0results\u00a0were\u00a0first\u00a0published\u00a0at\u00a0ECOC\u00a02013\u00a0(In\u00a0de\u00a0Betou,\u00a0Bunge,\u00a0\u00c5hlfeldt,\u00a0and\u00a0Olson,\u00a0“140km\u00a0Long-reach\u00a0WDM-PON\u00a0Test\u00a0for\u00a0Ring-based\u00a0Access\u00a0Network\u00a0Architecture”).\u00a0This\u00a0partnership\u00a0has\u00a0investigated\u00a0what\u00a0opportunities\u00a0could\u00a0be\u00a0provided\u00a0by\u00a0WDM-PON\u00a0technology\u00a0in\u00a0such\u00a0network\u00a0topologies\u00a0by\u00a0studying\u00a0experimentally\u00a0the\u00a0influence\u00a0of\u00a0narrow\u00a0filtering\u00a0and\u00a0maximum\u00a0reach. The\u00a0experimental\u00a0testbed\u00a0(in\u00a0Leipzig)\u00a0was\u00a0built\u00a0around\u00a0Transmode’s\u00a0TM-Series\u00a0iWDM-PON\u00a0system\u00a0to\u00a0create\u00a0an\u00a0optical\u00a0line\u00a0terminal\u00a0(OLT)\u00a0(see\u00a0Figure\u00a02).\u00a0The\u00a0OLT\u00a0has\u00a0a\u00a0transponder\u00a0line\u00a0card\u00a0that\u00a0hosts\u00a0pluggable\u00a0wavelength-locked\u00a0Fabry-Perot\u00a0transceivers,\u00a0ASE\u00a0seed\u00a0light\u00a0sources,\u00a0dual\u00a0circulators\u00a0for\u00a0up-\u00a0and\u00a0downstream,\u00a0and\u00a0a\u00a040-channel\u00a0multiplexer\u00a0based\u00a0on\u00a0an\u00a0AWG. To\u00a0reach\u00a0distances\u00a0beyond\u00a0100\u00a0km,\u00a0amplifiers\u00a0dispersion\u00a0compensation,\u00a0and\u00a0remote\u00a0ASE\u00a0seed\u00a0sources\u00a0were\u00a0used.\u00a0While\u00a0an\u00a0experimental\u00a0field\u00a0trial\u00a0today,\u00a0it\u00a0shows\u00a0that\u00a0WDM-PON\u00a0may\u00a0well\u00a0continue\u00a0to\u00a0evolve\u00a0to\u00a0support\u00a0longer\u00a0reach\u00a0and\u00a0more\u00a0sophisticated\u00a0network\u00a0architectures\u00a0in\u00a0the\u00a0future\u00a0supporting\u00a0a\u00a0broader\u00a0range\u00a0of\u00a0deployment\u00a0scenarios. DK\u00a0Photonics\u00a0\u2013\u00a0www.dkphotonics.com\u00a0specializes\u00a0in\u00a0designing\u00a0and\u00a0manufacturing\u00a0of\u00a0high\u00a0quality\u00a0optical\u00a0passive\u00a0components\u00a0mainly\u00a0for\u00a0telecommunication,\u00a0fiber\u00a0sensor\u00a0and\u00a0fiber\u00a0laser\u00a0applications,such\u00a0as\u00a0High\u00a0Power\u00a0Isolator,1064nm\u00a0Components,PM\u00a0Components,Pump\u00a0Combiner,Pump\u00a0Laser\u00a0Protector,which\u00a0using\u00a0for\u00a0fiber\u00a0laser\u00a0applications.Also\u00a0have\u00a0Mini-size\u00a0CWDM,\u00a0Optical\u00a0Circulator,\u00a0PM\u00a0Circulator,PM\u00a0Isolator,\u00a0Fused\u00a0Coupler,Mini\u00a0Size\u00a0Fused\u00a0WDM.More\u00a0information,please\u00a0contact\u00a0us.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[49,52,3,33,53,26,35,50,36,116,51],"class_list":["post-335","post","type-post","status-publish","format-standard","hentry","category-fttx","tag-1064nm-components","tag-fused-coupler","tag-high-power-isolator","tag-mini-size-cwdm","tag-mini-size-fused-wdm","tag-optical-circulator","tag-pm-circulator","tag-pm-components","tag-pm-isolator","tag-pump-combiner","tag-pump-laser-protector"],"yoast_head":"\nWhere can WDM-PON go next? 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