Zizindikiro za Mach-Zehnder modulator

Zizindikiro zaMach-Zehnder modulator

Mach-Zehnder Modulator (yofupikitsidwa ngatiMZM modulator) ndi chipangizo chofunikira chomwe chimagwiritsidwa ntchito pokwaniritsa kusintha kwa chizindikiro cha kuwala m'munda wa kulumikizana kwa kuwala. Ndi gawo lofunikira laChowongolera cha Electro-Optic, ndipo zizindikiro zake zogwirira ntchito zimakhudza mwachindunji magwiridwe antchito a kutumiza mauthenga komanso kukhazikika kwa njira zolumikizirana. Izi ndi chiyambi cha zizindikiro zake zazikulu:

Magawo owala

1. Bandwidth ya 3dB: Imatanthauza kuchuluka kwa ma frequency pamene amplitude ya chizindikiro chotulutsa cha modulator imatsika ndi 3dB, ndipo unit ndi GHz. Bandwidth ikakwera, kuchuluka kwa chizindikiro chothandizira kumakwera. Mwachitsanzo, bandwidth ya 90GHz imatha kuthandizira kutumiza chizindikiro cha 200Gbps PAM4.

2. Chiŵerengero cha Kutha (ER): Chiŵerengero cha mphamvu yayikulu yotulutsa kuwala poyerekeza ndi mphamvu yochepa yowunikira, yokhala ndi unit ya dB. Chiŵerengero cha kutha mphamvu chikakhala chachikulu, kusiyana pakati pa “0″ ndi “1″ mu chizindikiro kumaonekera bwino, ndipo mphamvu yolimbana ndi phokoso imakulanso.

3. Kutayika kwa mphamvu yowunikira: Kutayika kwa mphamvu yowunikira komwe kumayambitsidwa ndi modulator, ndi unit ya dB. Kutayika kolowera kukakhala kochepa, kumawonjezera magwiridwe antchito onse a dongosolo.

4. Kutayika kwa magetsi: Chiŵerengero cha mphamvu yowunikira yomwe yawonetsedwa kumapeto kwa mphamvu yowunikira yomwe yalowetsedwa, ndi gawo la dB. Kutayika kwakukulu kwa magetsi komwe kwabwerezedwa kumatha kuchepetsa mphamvu ya kuwala komwe kwawonekera pa dongosolo.

Magawo amagetsi

Voliyumu ya theka la mafunde (Vπ): Voliyumu yofunikira kuti ipange kusiyana kwa gawo la 180° mu chizindikiro cha kuwala cha modulator, choyesedwa mu V. Vπ ikatsika, kufunikira kwa voltage yoyendetsera kumakhala kochepa ndipo kugwiritsa ntchito mphamvu kumakhala kochepa.

2. Mtengo wa VπL: Chopangidwa ndi voteji ya theka la mafunde ndi kutalika kwa modulator, zomwe zikuwonetsa magwiridwe antchito a modulation. Mwachitsanzo, VπL = 2.2V·cm (L=2.58mm) ikuyimira voteji ya modulation yomwe ikufunika pautali winawake.

3. Dc bias voltage: Imagwiritsidwa ntchito kukhazikika malo ogwirira ntchito amodulatorndipo letsa kusuntha kwa tsankho komwe kumachitika chifukwa cha zinthu monga kutentha ndi kugwedezeka.

Zizindikiro zina zofunika

1. Kuchuluka kwa deta: Mwachitsanzo, mphamvu yotumizira chizindikiro cha PAM4 ya 200Gbps imasonyeza mphamvu yolumikizirana yachangu kwambiri yothandizidwa ndi modulator.

2. Mtengo wa TDECQ: Chizindikiro choyezera mtundu wa zizindikiro zosinthidwa, pomwe chipangizocho chili dB. Mtengo wa TDECQ ukakwera, mphamvu ya chizindikirocho yolimbana ndi phokoso imakula kwambiri ndipo chiwopsezo cha zolakwika za bit chimachepa.

Chidule: Kugwira ntchito kwa modulator ya March-Zendl kumatsimikiziridwa mokwanira ndi zizindikiro monga bandwidth ya optical, quantity ratio, insertion loss, ndi half-wave voltage. bandwidth yayikulu, low insertion loss, quantity ratio yayikulu ndi low Vπ ndi zinthu zofunika kwambiri za ma modulator apamwamba, zomwe zimakhudza mwachindunji kuchuluka kwa kutumiza, kukhazikika ndi kugwiritsa ntchito mphamvu kwa machitidwe olumikizirana ndi optical.