II-Modulator kaMach-Zehnder(MZ Modulator) sisixhobo esibalulekileyo sokulawula imiqondiso ye-optical ngokusekelwe kumgaqo wokuphazamiseka. Umgaqo waso wokusebenza ngolu hlobo lulandelayo: Kwisebe elinomfanekiso we-Y ekupheleni kokungena, ukukhanya kokungena kwahlulwe ngamaza amabini okukhanya kwaye kungena kwiitshaneli ezimbini ze-optical ezifanayo ukuze zidluliselwe ngokwahlukeneyo. Itshaneli ye-optical yenziwe ngezinto ze-electro-optic. Ngokusebenzisa isiphumo sayo se-photoelectric, xa isignali yombane esetyenziswa ngaphandle itshintsha, i-refractive index yezinto zayo inokutshintshwa, nto leyo ebangela umahluko ohlukeneyo wendlela ye-optical phakathi kwemitha emibini yokukhanya efikelela kwisebe elinomfanekiso we-Y ekupheleni kokuphuma. Xa imiqondiso ye-optical kwiitshaneli ezimbini ze-optical ifikelela kwisebe elinomfanekiso we-Y ekupheleni kokuphuma, kuya kubakho ukudibana. Ngenxa yokulibaziseka kwesigaba okwahlukeneyo kwemiqondiso ye-optical emibini, ukuphazamiseka kwenzeka phakathi kwazo, kuguqula ulwazi lomahluko wesigaba oluthwalwa zizibonakaliso ezimbini ze-optical lube lulwazi lobunzulu besignali yesiphumo. Ke ngoko, umsebenzi wokulawula imiqondiso yombane kwiinkampani ze-optical unokufezekiswa ngokulawula iiparameter ezahlukeneyo ze-voltage yokulayisha ye-modulator ye-March-Zehnder.
Iiparameter ezisisiseko zeI-MZ Modulator
Iiparameter ezisisiseko ze-MZ Modulator zichaphazela ngokuthe ngqo ukusebenza kwe-modulator kwiimeko ezahlukeneyo zokusetyenziswa. Phakathi kwazo, iiparameter ezibalulekileyo ze-optical kunye neeparameter zombane zezi zilandelayo.
Iiparameters ezibonakalayo:
(1) I-Optical bandwidth (i-3db bandwidth): Uluhlu lwefrikhwensi xa i-amplitude yempendulo yefrikhwensi yehla nge-3db ukusuka kwixabiso eliphezulu, iyunithi iyiGhz. I-Optical bandwidth ibonisa uluhlu lwefrikhwensi yesignali xa i-modulator isebenza ngokuqhelekileyo kwaye yiparameter yokulinganisa umthamo wokuthwala ulwazi we-optical carrier kwii-electro-optic modulator.
(2) Umlinganiselo wokuphela: Umlinganiselo wamandla aphezulu okukhanya yi-electro-optic modulator ukuya kumandla amancinci okukhanya, kunye neyunithi ye-dB. Umlinganiselo wokuphela yiparameter yokuvavanya amandla okutshintsha kwe-electro-optic ye-modulator.
(3) Ukulahleka kokubuya: Umlinganiselo wamandla okukhanya abonakalisiweyo ekupheleni kokufaka kwei-modulatorkumandla okukhanya okufakwayo, kunye neyunithi ye-dB. Ukulahleka kokubuya yiparameter ebonisa amandla okwenzekayo abonakala kumthombo wesignali.
(4) Ukulahleka kokufakwa: Umlinganiselo wamandla okukhanya aphumayo kumandla okukhanya angenayo emodulator xa ifikelela kumandla ayo aphezulu okukhupha, iyunithi iyi-dB. Ukulahleka kokufakwa sisalathisi esilinganisa ukulahleka kwamandla okukhanya okubangelwa kukufakwa kwendlela yokukhanya.
(5) Amandla okukhanya aphezulu okufaka: Ngexesha lokusetyenziswa okuqhelekileyo, amandla okukhanya okufaka i-MZM Modulator kufuneka abe ngaphantsi kweli xabiso ukuthintela umonakalo wesixhobo, iyunithi ibe yi-mW.
(6) Ubunzulu bokuguquguquka: Kubhekisa kumlinganiselo we-amplitude yesignali yokuguquguquka kwi-amplitude yenkampani ethwala, edla ngokubonakaliswa njengepesenti.
Iiparameter zombane:
I-voltage yesiqingatha-samaza: Ibhekisa kumahluko we-voltage ofunekayo ukuze i-voltage yokuqhuba itshintshe i-modulator ukusuka kwimeko yokungangeni ukuya kwimeko yokuvuleka. Amandla okukhanya okuphumayo e-MZM Modulator ayahluka ngokuqhubekayo ngotshintsho lwe-voltage ye-bias. Xa i-output ye-modulator ivelisa umahluko wesigaba se-180-degree, umahluko kwi-voltage ye-bias ehambelana nenqaku elincinci elikufutshane kunye nenqaku eliphezulu yi-voltage yesiqingatha-samaza, kunye neyunithi ye-V. Le parameter imiselwa zizinto ezifana nezinto, ulwakhiwo kunye nenkqubo, kwaye yi-parameter yendalo yeI-MZM Modulator.
(2) I-voltage ephezulu ye-DC bias: Ngexesha lokusetyenziswa okuqhelekileyo, i-voltage ye-input bias ye-MZM kufuneka ibe ngaphantsi kweli xabiso ukuthintela umonakalo wesixhobo. Iyunithi yi-V. I-voltage ye-DC bias isetyenziselwa ukulawula imeko ye-bias ye-modulator ukuhlangabezana neemfuno ezahlukeneyo ze-modulation.
(3) Ixabiso eliphezulu lesignali ye-RF: Ngexesha lokusetyenziswa okuqhelekileyo, isignali yombane ye-RF engenayo ye-MZM kufuneka ibe ngaphantsi kweli xabiso ukuthintela ukonakala kwesixhobo. Iyunithi yi-V. Isignali yerediyo yisignali yombane eza kutshintshwa kwi-carrier ye-optical.
Ixesha leposi: Juni-16-2025