Ulawulo lwe-electro-optic lwe-polarization lufezekiswa ngokubhala nge-laser ye-femtosecond kunye ne-liquid crystal modulation.

I-electro-optic ye-polarizationulawulo lufezekiswa ngokubhala nge-laser ye-femtosecond kunye ne-liquid crystal modulation

Abaphandi eJamani baphuhlise indlela entsha yokulawula isignali ye-optical ngokudibanisa ukubhala nge-laser ye-femtosecond kunye ne-liquid crystalukuguquguquka kwe-electro-opticNgokufaka umaleko wekristale yolwelo kwi-waveguide, ulawulo lwe-electro-optical lwemeko ye-beam polarization luyafezekiswa. Le teknoloji ivula amathuba amatsha ngokupheleleyo kwizixhobo ezisekwe kwi-chip kunye neesekethe ze-photonic ezintsonkothileyo ezenziwe kusetyenziswa iteknoloji yokubhala nge-laser ye-femtosecond. Iqela lophando lichaze indlela abazenze ngayo iiplate zamaza ezinokuguqulwa kwii-waveguide ze-silicon ezixutyiweyo. Xa i-voltage isetyenziswa kwi-liquid crystal, ii-molecule zekristale yolwelo ziyajikeleza, nto leyo etshintsha imeko ye-polarization yokukhanya okudluliselwe kwi-waveguide. Kwizilingo ezenziweyo, abaphandi baphumelele ekuguquleni ngokupheleleyo i-polarization yokukhanya kwii-wavelengths ezimbini ezibonakalayo ezahlukeneyo (Umfanekiso 1).

Ukudibanisa iiteknoloji ezimbini ezibalulekileyo ukuze kufezekiswe inkqubela phambili entsha kwizixhobo ezidityanisiweyo ze-3D photonic
Amandla ee-laser ze-femtosecond okubhala ngokuchanekileyo ii-waveguides nzulu ngaphakathi kwezinto, endaweni yokuba zibhale phezu komhlaba, zenza zibe yiteknoloji ethembisayo yokwandisa inani lee-waveguides kwitshiphu enye. Le teknoloji isebenza ngokujolisa umqadi we-laser onamandla aphezulu ngaphakathi kwezinto ezibonakalayo. Xa amandla okukhanya efikelela kwinqanaba elithile, umqadi utshintsha iimpawu zezinto kwindawo ezisetyenziswa kuyo, njengepeni echanekileyo ye-micron.
Iqela lophando lidibanise iindlela ezimbini ezisisiseko ze-photon ukufaka umaleko weekristale zolwelo kwi-waveguide. Njengoko i-beam ihamba kwi-waveguide nakwi-crystal yolwelo, isigaba kunye ne-polarization ye-beam iyatshintsha xa kusetyenziswa intsimi yombane. Emva koko, i-beam eguquliweyo iya kuqhubeka isasazeka kwinxalenye yesibini ye-waveguide, ngaloo ndlela ifezekisa ukudluliselwa kwesignali ye-optical kunye neempawu ze-modulation. Le teknoloji ye-hybrid edibanisa ezi teknoloji zimbini ivumela iingenelo zombini kwisixhobo esinye: kwelinye icala, uxinano oluphezulu lokukhanya olubangelwa yimpembelelo ye-waveguide, kwaye kwelinye icala, ukulungiswa okuphezulu kwe-crystal yolwelo. Olu phando luvula iindlela ezintsha zokusebenzisa iipropati zeekristale zolwelo ukufaka ii-waveguide kumthamo uwonke wezixhobo njengeiimodulatorsngenxaizixhobo zefotoniki.

Umfanekiso 1 Abaphandi bafake iileya zekristale yolwelo kwii-waveguides ezenziwe ngokubhala ngqo nge-laser, kwaye isixhobo esidibeneyo esiphumayo singasetyenziselwa ukutshintsha i-polarisation yokukhanya edlula kwii-waveguides.

Ukusetyenziswa kunye neenzuzo zekristale yolwelo kwi-femtosecond laser waveguide modulation
Nangonaukuguquguquka kokukhanyaKwi-femtosecond laser writing waveguides ngaphambili kwafezwa ikakhulu ngokusebenzisa ubushushu bendawo kwi-waveguides, kolu phononongo, i-polarization yayilawulwa ngokuthe ngqo ngokusebenzisa iikristale zolwelo. “Indlela yethu ineenzuzo ezininzi ezinokubakho: ukusetyenziswa kwamandla okuphantsi, ukukwazi ukucubungula ii-waveguides ngazinye ngokuzimeleyo, kunye nokunciphisa ukuphazamiseka phakathi kwe-waveguides ezikufutshane,” baphawula abaphandi. Ukuvavanya ukusebenza kwesixhobo, iqela lifake i-laser kwi-waveguide kwaye laguqula ukukhanya ngokutshintsha i-voltage esetyenziswa kumaleko wekristale yolwelo. Utshintsho lwe-polarization olubonwe kwimveliso luhambelana nolindelo lwethiyori. Abaphandi bakwafumanise ukuba emva kokuba i-liquid crystal idityaniswe ne-waveguide, iimpawu ze-modulation ze-liquid crystal azizange zitshintshe. Abaphandi bagxininisa ukuba olu phononongo lububungqina nje bengcamango, ngoko ke kusekho umsebenzi omninzi ekufuneka wenziwe ngaphambi kokuba ubuchwepheshe busetyenziswe ekusebenzeni. Umzekelo, izixhobo zangoku ziguqula zonke ii-waveguides ngendlela efanayo, ngoko ke iqela lisebenza ukufezekisa ulawulo oluzimeleyo lwe-waveguide nganye nganye.