Izinkomba ze-modulator ye-Mach-Zehnder

Izinkomba ze-I-modulator ye-Mach-Zehnder

I-Mach-Zehnder Modulator (efushanisiwe njengeI-modulator ye-MZM) iyithuluzi eliyisihluthulelo elisetshenziselwa ukufeza ukuguqulwa kwesignali ye-optical emkhakheni wokuxhumana kwe-optical. Kuyingxenye ebalulekile yeI-Electro-Optic Modulator, kanye nezinkomba zayo zokusebenza zithinta ngqo ukusebenza kahle kokudlulisa kanye nokuzinza kwezinhlelo zokuxhumana. Okulandelayo yisingeniso sezinkomba zayo eziyinhloko:

Amapharamitha okukhanya

1. I-bandwidth ye-3dB: Ibhekisela kububanzi bemvamisa lapho ubukhulu besiginali yokuphuma ye-modulator yehla nge-3dB, kanti iyunithi iyi-GHz. Uma i-bandwidth iphakeme, kulapho izinga lokudluliswa kwesiginali elisekelwayo liphakama khona. Isibonelo, i-bandwidth ye-90GHz ingasekela ukudluliswa kwesiginali ye-PAM4 engu-200Gbps.

2. Isilinganiso sokuphela (ER): Isilinganiso samandla okukhanya aphezulu kakhulu kumandla okukhanya amancane, ngeyunithi ye-dB. Uma isilinganiso sokuphela siphezulu, kulapho umehluko phakathi kuka-“0″ no-“1″ esignalini ubonakala khona, futhi ikhono lokulwa nomsindo liqina khona.

3. Ukulahlekelwa kokufakwa: Ukulahlekelwa kwamandla okukhanya okwethulwa yi-modulator, ngeyunithi ye-dB. Uma ukulahlekelwa kokufakwa kuphansi, kulapho ukusebenza kahle kwesistimu kuphakama khona.

4. Ukulahleka kokubuya: Isilinganiso samandla okukhanya abonakalayo ekugcineni kokufakwayo namandla okukhanya okufakwayo, ngeyunithi ye-dB. Ukulahleka kokubuya okuphezulu kunganciphisa umthelela wokukhanya okubonakalayo ohlelweni.

Amapharamitha kagesi

I-voltage yesigamu-wamagagasi (i-Vπ): I-voltage edingekayo ukukhiqiza umehluko wesigaba esingu-180° kusignali yokukhanya yokukhipha ye-modulator, elinganiswa ku-V. Uma i-Vπ iphansi, isidingo se-voltage yokushayela siba sincane futhi ukusetshenziswa kwamandla kuba phansi.

2. Inani le-VπL: Umkhiqizo we-voltage ye-half-wave kanye nobude be-modulator, okubonisa ukusebenza kahle kwe-modulation. Isibonelo, i-VπL = 2.2V·cm (L=2.58mm) imele i-voltage ye-modulation edingekayo ngobude obuthile.

3. I-Dc bias voltage: Isetshenziselwa ukuqinisa indawo yokusebenza ye-i-modulatorfuthi kuvimbele ukukhukhuleka kokukhetha okubangelwa yizici ezifana nokushisa nokudlidliza.

Ezinye izinkomba ezibalulekile

1. Izinga ledatha: Isibonelo, ikhono lokudlulisa isignali ye-PAM4 engu-200Gbps libonisa ikhono lokuxhumana lesivinini esiphezulu elisekelwa yi-modulator.

2. Inani le-TDECQ: Inkomba yokulinganisa ikhwalithi yezimpawu eziguquliwe, iyunithi iyi-dB. Uma inani le-TDECQ liphakeme, ikhono lesignali lokulwa nomsindo liqina futhi izinga lamaphutha e-bit liphansi.

Isifinyezo: Ukusebenza kwe-modulator ka-March-Zendl kunqunywa ngokuphelele yizinkomba ezifana ne-bandwidth ye-optical, isilinganiso sokuqedwa, ukulahlekelwa kokufakwa, kanye ne-voltage ye-half-wave. I-bandwidth ephezulu, ukulahlekelwa kokufakwa okuphansi, isilinganiso sokuqedwa okuphezulu kanye ne-Vπ ephansi yizici ezibalulekile zama-modulator asebenza kahle kakhulu, ezithinta ngqo izinga lokudlulisela, ukuzinza kanye nokusetshenziswa kwamandla kwezinhlelo zokuxhumana ze-optical.