II-Modulator ye-Mach-Zehnder(MZ Modulator) iyithuluzi elibalulekile lokuguqula izimpawu zokukhanya ngokusekelwe kusimiso sokuphazamiseka. Umgomo walo wokusebenza ungokulandelayo: Egatsheni elinomumo we-Y ekugcineni kokufaka, ukukhanya kokufaka kuhlukaniswe ngamagagasi okukhanya amabili futhi kungena eziteshini ezimbili ze-optical ezihambisanayo ukuze zidluliselwe ngokulandelana. Isiteshi se-optical senziwe ngezinto ze-electro-optic. Ngokusebenzisa umphumela waso we-photoelectric, lapho isignali kagesi esetshenziswa ngaphandle ishintsha, inkomba yokukhanya kwezinto zayo ingashintshwa, okuholela ekuhlukeni okuhlukile kwendlela ye-optical phakathi kwemishayo emibili yokukhanya efinyelela egatsheni elinomumo we-Y ekugcineni kokukhipha. Lapho izimpawu zokukhanya eziteshini ezimbili ze-optical zifika egatsheni elinomumo we-Y ekugcineni kokukhipha, kuzohlangana. Ngenxa yokubambezeleka kwesigaba okuhlukene kwezibonakaliso ezimbili ze-optical, ukuphazamiseka kwenzeka phakathi kwazo, kuguqulwa ulwazi lomehluko wesigaba oluthwalwa yizibonakaliso ezimbili ze-optical lube ulwazi lokuqina kwesignali yokukhipha. Ngakho-ke, umsebenzi wokuguqula izimpawu zikagesi ezithwalweni ze-optical ungafezwa ngokulawula amapharamitha ahlukahlukene e-voltage yokulayisha ye-modulator kaMashi-Zehnder.
Amapharamitha ayisisekeloI-MZ Modulator
Amapharamitha ayisisekelo e-MZ Modulator athinta ngqo ukusebenza kwe-modulator ezimweni ezahlukahlukene zohlelo lokusebenza. Phakathi kwawo, amapharamitha abalulekile okukhanya kanye namapharamitha kagesi yilena elandelayo.
Amapharamitha okukhanya:
(1) I-bandwidth ebonakalayo (i-bandwidth ye-3db): Ububanzi bemvamisa lapho ubukhulu bempendulo yemvamisa buncipha ngo-3db kusukela enanini eliphezulu, kanti iyunithi iyi-Ghz. I-bandwidth ebonakalayo ibonisa ububanzi bemvamisa yesignali lapho i-modulator isebenza ngokujwayelekile futhi iyipharamitha yokulinganisa umthamo wokuthwala ulwazi wesithwali se-optical kui-electro-optic modulator.
(2) Isilinganiso sokuphela: Isilinganiso sokukhishwa kwamandla aphezulu okukhanya yi-modulator ye-electro-optic kuya kumandla amancane okukhanya, ngeyunithi ye-dB. Isilinganiso sokuphela siyipharamitha yokuhlola ikhono lokushintsha kwe-electro-optic le-modulator.
(3) Ukulahleka kokubuya: Isilinganiso samandla okukhanya abonakalisiwe ekugcineni kokufakwayo kwe-i-modulatorkumandla okukhanya okufakwayo, ngeyunithi ye-dB. Ukulahleka kokubuya kuyipharamitha ekhombisa amandla esigameko abonakala emuva kumthombo wesignali.
(4) Ukulahlekelwa kokufakwa: Isilinganiso samandla okukhanya okukhiphayo namandla okukhanya okufakayo e-modulator uma ifinyelela amandla ayo aphezulu okukhipha, iyunithi iyi-dB. Ukulahlekelwa kokufakwa kuyinkomba elinganisa ukulahleka kwamandla okukhanya okubangelwa ukufakwa kwendlela yokukhanya.
(5) Amandla okukhanya aphezulu okufaka: Ngesikhathi sokusetshenziswa okuvamile, amandla okukhanya okufaka i-MZM Modulator kufanele abe ngaphansi kwaleli nani ukuvimbela umonakalo wedivayisi, iyunithi iyi-mW.
(6) Ukujula kokuguquguquka: Kubhekisela esilinganisweni se-amplitude yesignali yokuguquguquka ku-amplitude yenkampani ethwala, evame ukuvezwa njengephesenti.
Amapharamitha kagesi:
I-voltage engamagagasi ayisithupha: Ibhekisela kumehluko we-voltage edingekayo ukuze i-voltage yokushayela ishintshe i-modulator isuke esimweni sokungasasebenzi iye esimweni sokusebenza. Amandla okukhanya okukhiphayo e-MZM Modulator ayahlukahluka ngokuqhubekayo ngokushintsha kwe-voltage ye-bias. Lapho ukuphuma kwe-modulator kukhiqiza umehluko wesigaba samadigri ayi-180, umehluko ku-voltage ye-bias ohambelana nephuzu elincane eliseduze kanye nephuzu eliphakeme yi-voltage engamagagasi ayisithupha, ngeyunithi engu-V. Le parameter inqunywa yizici ezifana nezinto ezibonakalayo, isakhiwo kanye nenqubo, futhi iyipharamitha eyisisekelo yeI-MZM Modulator.
(2) I-voltage ephezulu ye-DC bias: Ngesikhathi sokusetshenziswa okuvamile, i-voltage ye-input bias ye-MZM kufanele ibe ngaphansi kwaleli nani ukuvimbela umonakalo wedivayisi. Iyunithi ingu-V. I-voltage ye-DC bias isetshenziselwa ukulawula isimo se-bias se-modulator ukuze kuhlangatshezwane nezidingo ezahlukene ze-modulation.
(3) Inani elikhulu lesignali ye-RF: Ngesikhathi sokusetshenziswa okuvamile, isignali kagesi ye-RF yokufaka ye-MZM kufanele ibe ngaphansi kwaleli nani ukuvimbela umonakalo wedivayisi. Iyunithi ingu-V. Isignali yemvamisa yomsakazo iyisignali kagesi okufanele iguqulwe ibe yi-optical carrier.
Isikhathi sokuthunyelwe: Juni-16-2025