Ukulawulwa kwe-electro-optic kwe-polarization kufezwa ngokubhala nge-laser ye-femtosecond kanye nokuguqulwa kwekristalu eliwuketshezi

I-electro-optic ye-polarizationUkulawula kufezwa ngokubhala nge-laser ye-femtosecond kanye nokuguqulwa kwekristalu eliwuketshezi

Abacwaningi eJalimane bathuthukise indlela entsha yokulawula isignali ye-optical ngokuhlanganisa ukubhala nge-laser ye-femtosecond kanye ne-liquid crystalukuguqulwa kwe-electro-opticNgokufaka ungqimba lwekristalu eliwuketshezi ku-waveguide, ukulawulwa kwe-electro-optical kwesimo se-beam polarization kuyafezeka. Ubuchwepheshe buvula amathuba amasha ngokuphelele amadivayisi asekelwe ku-chip kanye namasekethe e-photonic ayinkimbinkimbi enziwe kusetshenziswa ubuchwepheshe bokubhala be-laser ye-femtosecond. Ithimba locwaningo lichaze kabanzi ukuthi lenza kanjani amapuleti wamagagasi alungisekayo kuma-waveguide e-silicon ahlanganisiwe. Lapho i-voltage isetshenziswa ku-liquid crystal, ama-molecule ekristalu eliwuketshezi ayajikeleza, okushintsha isimo se-polarization sokukhanya okudluliselwa ku-waveguide. Ekuhlolweni okwenziwe, abacwaningi baphumelele ngokuphelele ekuguquleni i-polarization yokukhanya kuma-wavelength amabili ahlukene abonakalayo (Isithombe 1).

Ukuhlanganisa ubuchwepheshe obubili obubalulekile ukuze kufezwe intuthuko entsha kumadivayisi ahlanganisiwe e-3D photonic
Ikhono lama-laser e-femtosecond lokubhala ngokunembile ama-waveguides ngaphakathi ngaphakathi kwezinto, kunokuba abe phezu nje, kuwenza abe ubuchwepheshe obuthembisayo bokwandisa inani lama-waveguides ku-chip eyodwa. Ubuchwepheshe busebenza ngokugxila umsebe we-laser onamandla aphezulu ngaphakathi kwezinto ezibonakalayo. Lapho amandla okukhanya efika ezingeni elithile, umsebe ushintsha izakhiwo zezinto lapho zisetshenziswa khona, njengepeni elinokunemba kwe-micron.
Ithimba locwaningo lihlanganise amasu amabili ayisisekelo e-photon ukufaka ungqimba lwamakristalu e-liquid ku-waveguide. Njengoba ugongolo luhamba ku-waveguide nakuyi-liquid crystal, isigaba kanye ne-polarization yogongolo kuyashintsha uma sekusetshenziswe insimu kagesi. Ngemva kwalokho, ugongolo oluguquliwe luzoqhubeka nokusabalala engxenyeni yesibili yogongolo, ngaleyo ndlela kufezwe ukudluliselwa kwesignali ye-optical ngezici zokuguquguquka. Lobu buchwepheshe obuhlanganisiwe obuhlanganisa ubuchwepheshe obubili buvumela izinzuzo zombili kudivayisi efanayo: ngakolunye uhlangothi, ukuminyana okuphezulu kokukhanya okubangelwa umphumela wogongolo, kanti ngakolunye uhlangothi, ukulungiswa okuphezulu kwekristalu e-liquid. Lolu cwaningo luvula izindlela ezintsha zokusebenzisa izakhiwo zamakristalu e-liquid ukufaka ama-waveguide kumthamo ophelele wamadivayisi njengobaama-modulatorsngobaamadivayisi e-photonic.

Isibalo 1 Abacwaningi bafaka izendlalelo zekristalu eliwuketshezi kuma-waveguides adalwe ngokubhala okuqondile kwe-laser, futhi idivayisi ehlanganisiwe ephumayo ingasetshenziswa ukushintsha ukuhlukaniswa kokukhanya okudlula kuma-waveguides.

Ukusetshenziswa kanye nezinzuzo zekristalu eliwuketshezi ekuguqulweni kwe-waveguide ye-laser ye-femtosecond
Nakubaukuguqulwa kokukhanyaKuma-waveguides okubhala nge-laser ye-femtosecond ngaphambili kwafezwa ngokuyinhloko ngokusebenzisa ukushisa kwendawo kuma-waveguides, kulolu cwaningo, i-polarization yayilawulwa ngqo ngokusebenzisa amakristalu e-liquid. “Indlela yethu inezinzuzo eziningana ezingaba khona: ukusetshenziswa kwamandla okuphansi, ikhono lokucubungula ama-waveguides ngamanye ngokuzimela, kanye nokunciphisa ukuphazamiseka phakathi kwama-waveguides aseduze,” kuphawula abacwaningi. Ukuze bahlole ukusebenza kahle kwedivayisi, ithimba lifake i-laser ku-waveguides futhi lalungisa ukukhanya ngokushintshashintsha i-voltage esetshenziswa kungqimba lwekristalu e-liquid. Izinguquko ze-polarization ezibonwe ekuphumeni ziyahambisana nokulindelwe kwethiyori. Abacwaningi bathole nokuthi ngemva kokuba ikristalu e-liquid ihlanganiswe ne-waveguide, izici zokuguquguquka kwekristalu e-liquid azizange zishintshe. Abacwaningi bagcizelela ukuthi ucwaningo luwubufakazi nje bomqondo, ngakho-ke kusenomsebenzi omningi okusamele wenziwe ngaphambi kokuba ubuchwepheshe busetshenziswe ekusebenzeni. Isibonelo, amadivayisi amanje alungisa wonke ama-waveguides ngendlela efanayo, ngakho-ke ithimba lisebenza ukuze lifinyelele ukulawula okuzimele kwe-waveguides ngayinye.