Alamar Mach-Zehnder modulator

Alamun daMach-Zehnder modulator

Mach-Zehnder Modulator (wanda aka gajarta a matsayinMZM modulator) wata babbar na'ura ce da ake amfani da ita don cimma nasarar daidaita siginar gani a fagen sadarwar gani. Yana da muhimmin bangarenElectro-Optic Modulator, kuma alamun aikin sa kai tsaye suna shafar ingancin watsawa da kwanciyar hankali na tsarin sadarwa. Mai zuwa shine gabatarwa ga manyan alamominsa:

Siffofin gani

1. 3dB bandwidth: Yana nufin kewayon mitar lokacin da girman siginar fitarwa na na'ura mai canzawa ya ragu da 3dB, tare da naúrar kasancewa GHz. Mafi girman bandwidth, mafi girman adadin watsa siginar da aka goyan baya. Misali, bandwidth na 90GHz na iya tallafawa watsa siginar 200Gbps PAM4.

2. Komawa rabo (er): rabo daga matsakaicin fitarwa na fitarwa zuwa mafi ƙarancin iko, tare da naúrar DB. Mafi girman rabon ɓarna, mafi bambanta bambanci tsakanin "0" da "1" a cikin siginar, kuma mafi ƙarfin ƙarfin hana amo.

3. Asarar shigarwa: Asarar wutar lantarki ta hanyar modulator, tare da naúrar dB. Ƙananan asarar shigarwa, mafi girman ingantaccen tsarin tsarin.

4. Komawa hasara: Matsakaicin ikon gani da aka nuna a ƙarshen shigarwa zuwa ikon gani na shigarwa, tare da naúrar dB. Babban hasara na dawowa zai iya rage tasirin hasken haske akan tsarin.

Sigar lantarki

Wutar wutar lantarki ta rabin-wave (Vπ): Wutar lantarki da ake buƙata don samar da bambance-bambancen lokaci na 180 ° a cikin siginar fitarwa na mai daidaitawa, wanda aka auna a cikin V. Ƙarƙashin Vπ, ƙarami da buƙatun ƙarfin lantarki da ake buƙata kuma rage yawan wutar lantarki.

2. Ƙimar VπL: Samfurin ƙarfin wutar lantarki na rabin-girgiza da tsayin mai daidaitawa, yana nuna ingancin daidaitawa. Misali, VπL = 2.2V·cm (L=2.58mm) yana wakiltar wutar lantarki da ake buƙata a takamaiman tsayi.

3. Dc bias voltage: Ana amfani dashi don daidaita wurin aiki namai daidaitawada kuma hana karkatar da son rai sakamakon abubuwa kamar zazzabi da girgiza.

Sauran maɓalli masu mahimmanci

1. Adadin bayanai: Misali, 200Gbps PAM4 ikon watsa siginar yana nuna damar sadarwa mai sauri da goyan bayan mai daidaitawa.

2. Ƙimar TDECQ: Mai nuna alama don auna ingancin siginar da aka daidaita, tare da naúrar kasancewa dB. Mafi girman ƙimar TDECQ, ƙarfin siginar na hana surutu kuma yana rage ƙimar kuskuren bit.

Takaitawa: Aikin na'urar modulator na Maris-Zendl an ƙayyadadden ƙayyadaddun bayanai kamar su bandwidth na gani, rabon ɓarna, asarar sakawa, da wutar lantarki rabin-kalaman. Babban bandwidth, ƙarancin shigar da asarar, babban ɓarna da ƙarancin Vπ sune mahimman fasalulluka na manyan masu haɓakawa, waɗanda ke shafar ƙimar watsawa kai tsaye, kwanciyar hankali da amfani da makamashi na tsarin sadarwa na gani.