Izinkomba ze-modulator ye-Mach-Zehnder

Izinkomba ze-I-Mach-Zehnder module

I-Mach-Zehnder Modulator (efushanisiwe ngokuthiI-MZM module) iyidivayisi eyinhloko esetshenziselwa ukuzuza ukushintshwa kwesignali yokubona emkhakheni wokuxhumana ngokubona. Kuyingxenye ebalulekile yeI-Electro-Optic Modulator, futhi izinkomba zayo zokusebenza zithinta ngokuqondile ukusebenza kahle kokudlulisela kanye nokuzinza kwezinhlelo zokuxhumana. Okulandelayo yisingeniso sezinkomba zayo eziyinhloko:

Imingcele ye-Optical

1. Umkhawulokudonsa ongu-3dB: Ubhekisela ebangeni lefrikhwensi lapho i-amplitude yesiginali yokuphuma kwemoduli yehla ngo-3dB, iyunithi ibe yi-GHz. Lapho umkhawulokudonsa uphezulu, izinga lokudluliswa kwesignali elisekelwayo liyaphakama. Isibonelo, i-bandwidth engu-90GHz ingasekela ukudluliswa kwesignali engu-200Gbps PAM4.

2. I-Extinction ratio (ER) : Isilinganiso samandla amakhulu okukhiphayo okukhiphayo kumandla abonakalayo amancane, neyunithi ye-dB. Ukuphakama kwesilinganiso sokuqothulwa, kulapho umehluko uhluka kakhulu phakathi kuka-“0″ no-“1” kusiginali, futhi kuqina amandla okulwa nomsindo.

3. Ukulahlekelwa kokufakwayo: Ukulahlekelwa kwamandla okubona okwethulwa isiguquli, ngeyunithi ye-dB. Ukuncipha kokulahlekelwa kokufaka, kuyanda ukusebenza kahle okuphelele kwesistimu.

4. Ukulahlekelwa kokubuyisela: Isilinganiso samandla okukhanya abonisiwe ekugcineni kokufaka emandleni okufaka abonakalayo, neyunithi ye-dB. Ukulahlekelwa okuphezulu kwembuyiselo kunganciphisa umthelela wokukhanya okubonisiwe kusistimu.

Imingcele kagesi

I-voltage ye-half-wave (Vπ) : I-voltage edingekayo ukuze kukhiqizwe umehluko wesigaba esingu-180° kusiginali ye-optical ephumayo yemoduli, ikalwe ngo-V. Lapho iphansi i-Vπ, iba yincane imfuneko ye-voltage yokushayela futhi yehlisa ukusetshenziswa kwamandla.

2. Inani le-VπL: Umkhiqizo wevolthi yegagasi elinguhhafu kanye nobude bemoduli, okubonisa ukusebenza kahle kokuguquguquka. Ngokwesibonelo, i-VπL = 2.2V·cm (L=2.58mm) imele i-voltage yokushintshashintsha edingekayo ngobude obuthile.

3. I-Dc bias voltage: Isetshenziselwa ukuzinzisa indawo yokusebenza ye-imodulifuthi kuvimbele ukukhukhuleka okuchema okubangelwa izici ezifana nezinga lokushisa nokudlidliza.

Ezinye izinkomba ezibalulekile

1. Izinga ledatha: Isibonelo, i-200Gbps PAM4 ikhono lokudlulisa isignali libonisa ikhono lokuxhumana elinesivinini esiphezulu elisekelwa imoduli.

2. Inani le-TDECQ: Inkomba yokulinganisa ikhwalithi yamasiginali ashintshiwe, iyunithi ibe yi-dB. Lapho inani le-TDECQ liphakeme, kulapho amandla esiginali okulwa nomsindo anamandla khona kanye nezinga lephutha lebhithi eliphansi.

Isifinyezo: Ukusebenza kwemoduli ye-March-Zendl kunqunywa ngokuphelele izinkomba ezifana nomkhawulokudonsa obonakalayo, isilinganiso sokuqothulwa, ukulahlekelwa kokufaka, kanye ne-voltage yegagasi elinguhhafu. Umkhawulokudonsa ophezulu, ukulahleka kokufakwa okuphansi, isilinganiso sokuqothulwa okuphezulu kanye ne-Vπ ephansi yizici ezibalulekile zamamodulators asebenza kahle kakhulu, athinta ngokuqondile izinga lokudlulisela, ukuzinza kanye nokusetshenziswa kwamandla kwezinhlelo zokuxhumana ezibonakalayo.