I ke kūkulu ʻia ʻana o nā ʻoihana metropolitan area (ʻoi aku ka lōʻihi o ka OTN optical transmission network), he mea koʻikoʻi ka hawewe hawewe multiplexing. DWDM dense wavelength division multiplexing lako i ka lōʻihi lōʻihi, kiʻekiʻe-bandwidth hiki hoʻoili; He haʻahaʻa ke kumu kūʻai haʻahaʻa o ka CWDM. No laila, inā ʻoe e koho i nā mea hana multiplexing māhele hawewe kūpono no ke kūkulu ʻana i kahi ʻōnaehana hoʻoili optical maikaʻi?

He aha ka ʻokoʻa ma waenaCWDM/DWDM Multiplexer?

I kēia manawa, ʻo ke ala kūpono e hoʻoponopono ai i ka hoʻonui mau ʻana o ka hoʻouna ʻana i ka ʻike bandwidth e hoʻohana i ka CWDM wavelength division multiplexing lako a me ka DWDM wavelength division multiplexing lako, akā ʻokoʻa lākou i nā ʻano he nui.

(1) Ka hoʻokaʻawale ʻana ma waena o nā mea hana hoʻoheheʻe hawewe CWDM a me nā lako hoʻoheheʻe DWDM.

Hoʻomaopopo ʻia ka spacing channel ma ke ʻano he ʻokoʻa o ke alapine o ka mea lawe inoa ma waena o ʻelua mau kahawai optical pili, a hoʻohana maʻamau ʻia e pale i ka hoʻopili ʻana i waena. ʻOi aku ka laulā o nā lako hawewe nalu CWDM ma mua o ka DWDM wavelength division multiplexing lako. Hiki iā ia ke hoʻouna i 18 mau hawewe i loko o kahi kikoʻī kikoʻī mai 1271 nm a i 1611 nm me kahi kikowaena o 20 nm. Hiki i ka DWDM mahele hawewe multiplexing lako hiki ke hooili i 40, 80 a i ole 160 mau hawewe, a hiki i ka 0.8 nm.

(2) ʻO ka mamao o ka hoʻouna ʻana ma waena o ka CWDM wavelength division multiplexing lako a me DWDM wavelength division multiplexing lako.

No ka mea, ua hoʻohui nui ʻia ka nalu nalu o nā mea hana multiplexing dense wavelength division multiplexing (DWDM) i ke kaʻina hoʻoili fiber optical, hiki i ka DWDM wavelength division multiplexing lako ke hoʻouna i nā mamao lōʻihi ma mua o ka CWDM wavelength division multiplexing lako. ʻAʻole hiki ke hoʻokō i ka lawe ʻana i ka mamao palena ʻole, a ʻo 160 kilomita wale nō ka mamao o ka hawewe nalu, ʻoiai ʻo ka mamao o ka lawe ʻana o ka DWDM wavelength division multiplexing lako ma mua o ka CWDM wavelength division multiplexing lako.

(3) ʻO nā lasers modulated o ka CWDM wavelength division multiplexing equipment and DWDM wavelength division multiplexing equipment

ʻO ka ʻōnaehana o ka CWDM wavelength division multiplexing lako haʻahaʻa haʻahaʻa i nā hōʻailona ʻenehana o ka laser, a hoʻohana maʻamau i ka laser uncooled; Pono ka ʻōnaehana o ka DWDM wavelength division multiplexing equipment e hoʻohana i ka laser cooling, a hoʻohana ka laser cooling i kahi ʻano hoʻololi wela e hōʻoia ai i ka ʻōnaehana DWDM i ʻoi aku ka maikaʻi o ka hana, ʻoi aku ka palekana a me ka lōʻihi o ka lawelawe ʻana, no laila DWDM wavelength division multiplexer E hoʻopau i ka ikehu. ʻoi aku ma mua o ka CWDM haʻahaʻa hawewe multiplexing lako me ka hoʻohana ʻana i nā lasers uncooled

(4) ʻO ke kumukūʻai o ka CWDM hawewe nalu mahele multiplexing lako a me ka DWDM wavelength division multiplexing lako.

ʻO ka ʻōnaehana o ka DWDM wavelength division multiplexing equipment he non-uniform temperature distribution in a wide wavelength range, no laila ke hoʻohana ʻia ka ʻenehana laser hoʻoluʻu e hoʻoponopono i ka mahana, ua hoʻonui ʻia ke kumukūʻai o ka ʻōnaehana o ka DWDM wavelength division multiplexing lako. Eia kekahi, ʻo ka ʻōnaehana o ka DWDM wavelength division multiplexing lako maʻamau ʻehā a ʻelima mau manawa ʻoi aku ka maikaʻi ma mua o ka ʻōnaehana o ka CWDM wavelength division multiplexing lako. Eia nō naʻe, me ka piʻi nui ʻana o ka nui o nā hawewe nalu nui (DWDM), ʻo ke kumukūʻai o nā modula optical DWDM kokoke i 20% -25% haʻahaʻa ma mua o nā modula optical CWDM.