Pakumanga ma network a metropolitan area (makamaka ma network atalitali a OTN optical transmission network), zida za wavelength division multiplexing ndizofunikira kwambiri. DWDM wandiweyani wavelength division multiplexing zida ali mtunda wautali, mkulu-bandiwifi kufala mphamvu; CWDM coarse wavelength division multiplexing zida zili ndi mtengo wotsika. Ndiye ngati mungasankhe zida zoyenera zogawanitsa mafunde kuti mupange makina otumizira okwera mtengo?

Kodi pali kusiyana kotaniCWDM/DWDM Multiplexer?

Pakalipano, njira yabwino yothetsera kuwonjezeka kosalekeza kwa bandwidth yotumizira mauthenga ndi kugwiritsa ntchito zida za CWDM wavelength division multiplexing ndi DWDM wavelength division multiplexing zida, koma ndizosiyana m'zinthu zambiri.

(1) Kutalikirana kwa Channel pakati pa CWDM wavelength division multiplexing zida ndi DWDM wavelength division multiplexing zida

Kutalikirana kwamakanema kumatanthauzidwa ngati kusiyana kwanthawi zonyamulira pakati pa njira ziwiri zoyang'ana zoyandikana, ndipo nthawi zambiri amagwiritsidwa ntchito poletsa kusokoneza kwapakati. CWDM wavelength division multiplexing zida zili ndi malo ochulukirapo kuposa zida za DWDM wavelength division multiplexing. Itha kufalitsa mafunde 18 mu gridi yowoneka bwino kuchokera ku 1271 nm kupita ku 1611 nm yokhala ndi malo a 20 nm. Zida za DWDM wavelength division multiplexing zimatha kufalitsa mafunde a 40, 80 kapena 160, ndipo kusiyana kwa njira kungakhale 0.8 nm.

(2) Kutumiza mtunda pakati pa CWDM wavelength division multiplexing zida ndi DWDM wavelength division multiplexing zida

Chifukwa chakuti kutalika kwa mawonekedwe a dense wavelength division multiplexing equipment (DWDM) kumaphatikizidwa kwambiri mu njira yotumizira ma fiber optical, DWDM wavelength division multiplexing zida zimatha kutumiza mtunda wautali kuposa zida za CWDM wavelength division multiplexing. CWDM wavelength division multiplexing zipangizo panopa sangathe kukwaniritsa malire mtunda kufala, ndipo pazipita kufala mtunda ndi makilomita 160 okha, pamene kufala mtunda wa DWDM wavelength division multiplexing zida kuposa CWDM wavelength division multiplexing zida.

(3) Ma lasers osinthika a CWDM wavelength division multiplexing zida ndi DWDM wavelength division multiplexing zida

Dongosolo la zida za CWDM wavelength division multiplexing zili ndi zofunikira zochepa pazizindikiro zaukadaulo za laser, ndipo nthawi zambiri zimagwiritsa ntchito laser yosakhazikika; Dongosolo la zida za DWDM wavelength division multiplexing liyenera kugwiritsa ntchito laser yozizira, ndipo laser yozizira imatengera njira yosinthira kutentha kuti iwonetsetse kuti dongosolo la DWDM likuchita bwino, chitetezo chapamwamba komanso moyo wautali wautumiki, kotero DWDM wavelength division multiplexer Imawononga mphamvu zambiri. kuposa zida za CWDM wavelength division multiplexing pogwiritsa ntchito ma laser osakhazikika

(4) Mtengo wa CWDM wavelength division multiplexing zida ndi DWDM wavelength division multiplexing zida

Dongosolo la zida za DWDM wavelength division multiplexing zimakhala ndi kugawa kosafanana kwa kutentha m'madera osiyanasiyana, kotero pamene teknoloji yoziziritsa ya laser imagwiritsidwa ntchito pokonza kutentha, mtengo wogwiritsira ntchito dongosolo la DWDM wavelength division multiplexing zipangizo zikuwonjezeka. Kuonjezera apo, dongosolo la DWDM wavelength division multiplexing zipangizo nthawi zambiri zimakhala zokwera mtengo nthawi zinayi kapena zisanu kuposa dongosolo la CWDM wavelength division multiplexing zipangizo. Komabe, ndi kutchuka kochulukira kwa dense wavelength division multiplexers (DWDM), mtengo wa DWDM optical modules uli pafupi ndi 20% -25% wotsika kuposa wa CWDM optical modules.