Iyini i-modulator yesigaba

Yini ai-modulator yesigaba

I-modulator yesigaba iyimoduli yokubona engalawula isigaba se-laser beam. Izinhlobo ezijwayelekile zamamoduli wesigaba asuselwa kubhokisi lama-Pockelsama-modulators e-electro-optickanye nama-modulators ekristalu ewuketshezi, angaphinde asebenzise izinguquko zenkomba ye-thermal fibre refractive noma izinguquko zobude, noma ngokwelula ukushintsha ubude. Amamojula wesigaba ahlukahlukene asetshenziswa emkhakheni we-optics ehlanganisiwe, lapho ukukhanya okushintshiwe kubhebhetheka ku-waveguide.

Izici ezibalulekile zamamodula wesigaba zihlanganisa: Usayizi wokuguquguquka kwesigaba (okunquma inkomba yokuguquguquka namandla ahlobene ebhande eseceleni) kudinga umkhawulokudonsa we-voltage modulation yedrayivu (ibanga lefrikhwensi yokuguquguquka), ii-electro-optical moduleIkuhlelo lwe-GHz, futhi idivayisi esebenzisa umthelela oshisayo noma into ewuketshezi yekristalu incane kakhulu kunomkhawulokudonsa osebenzayo wendawo yokuvula idivayisi. Ikhawulela irediyasi yohlaka lwebhamu eshintshiwe Ubukhulu bangaphandle bedivayisi Lezi zakhiwo ziyahlukahluka kakhulu ezinhlotsheni ezihlukene zamamoduli wesigaba. Ngakho-ke, ama-modulators wesigaba ahlukene adinga ukusetshenziswa ezinhlelweni ezisebenzayo ezahlukahlukene.

Izibonelo zezinhlelo zokusebenza zemodula yesigaba zifaka: Imoduli yesigaba ku-laser resonator ye-laser-frequency single ingasetshenziselwa ukushuna ubude be-wavelength, noma ukukhiya imodi esebenzayo (ukukhiya imodi ye-FM) ye-laser ukuze kufakwe isigaba se-beam uma inomfutho wokumodula okumaphakathi, ingasetshenziswa kumshini wokuzinzisa imvamisa ye-laser, ngokwesibonelo, indlela ye-Peleferoll-interface yokuqiniswa kwesigaba se-D amadivaysi okulinganisa ama-spectral, ngokuvamile asebenzisa amasignali okushayela ngezikhathi ezithile. Ezinye izilinganiso zidinga ama-combs emvamisa, atholwa ngesigameko induku yefrikhwensi eyodwa kumoduli yesigaba. Kulesi simo, ukuguqulwa kwesigaba ngokuvamile kudinga ukuqina, ukuze ukwazi ukuthola amabhande amaningi aseceleni. Ku-transmitter yedatha yesistimu yokuxhumana ye-fiber optical, i-modulator yesigaba ingasetshenziswa ukunquma ulwazi oludlulisiwe. Isibonelo, kusetshenziswe indlela yokhiye we-phase-shift.