Kulamulira kwa electro-optic polarization kumachitika pogwiritsa ntchito femtosecond laser writing ndi liquid crystal modulation.

Kugawa kwa magetsi (electro-optic)Kulamulira kumachitika pogwiritsa ntchito femtosecond laser writing ndi liquid crystal modulation.

Ofufuza ku Germany apanga njira yatsopano yowongolera zizindikiro za kuwala mwa kuphatikiza kulemba kwa femtosecond laser ndi makristalo amadzimadzikusintha kwa magetsi ndi kuwala. Mwa kuyika gawo lamadzimadzi la kristalo mu waveguide, kuwongolera kwa electro-optical kwa mkhalidwe wa beam polarization kumachitika. Ukadaulowu umatsegula mwayi watsopano wa zida zochokera ku chip ndi ma photonic circuits ovuta opangidwa pogwiritsa ntchito ukadaulo wolemba wa femtosecond laser. Gulu lofufuza lidafotokoza momwe adapangira ma wave plates osinthika mu ma waveguides osakanikirana a silicon. Pamene magetsi agwiritsidwa ntchito ku crystal yamadzimadzi, mamolekyu amadzimadzi a crystal amazungulira, zomwe zimasintha momwe kuwala kumayendera mu waveguide. Mu zoyeserera zomwe zidachitika, ofufuzawo adakwanitsa kusintha kwathunthu polarization ya kuwala pa ma wavelength awiri osiyana owoneka (Chithunzi 1).

Kuphatikiza matekinoloje awiri ofunikira kuti tikwaniritse kupita patsogolo kwatsopano mu zida zophatikizika za 3D photonic
Kuthekera kwa ma laser a femtosecond kulemba molondola ma waveguides mkati mwa chinthucho, osati pamwamba pokha, kumawapangitsa kukhala ukadaulo wabwino kwambiri wowonjezera kuchuluka kwa ma waveguides pa chip chimodzi. Ukadaulowu umagwira ntchito poyang'ana kuwala kwa laser kwamphamvu kwambiri mkati mwa chinthu chowonekera. Kuwala kukafika pamlingo winawake, kuwalako kumasintha mawonekedwe a chinthucho pamalo ake ogwirira ntchito, monga cholembera cholondola cha micron.
Gulu lofufuza linaphatikiza njira ziwiri zazikulu za photon kuti liike makristalo amadzimadzi mu waveguide. Pamene kuwala kumayenda kudzera mu waveguide ndi kudzera mu liquid crystal, gawo ndi polarization ya kuwalako zimasintha magetsi akagwiritsidwa ntchito. Pambuyo pake, kuwala kosinthidwa kudzapitirira kufalikira kudzera mu gawo lachiwiri la waveguide, motero kukwaniritsa kutumiza kwa chizindikiro cha kuwala ndi makhalidwe a modulation. Ukadaulo wosakanizidwawu wophatikiza matekinoloje awiriwa umathandiza ubwino wa onse awiri mu chipangizo chimodzi: mbali imodzi, kuchuluka kwa kuwala komwe kumayambitsidwa ndi waveguide effect, ndipo kumbali ina, kusinthika kwakukulu kwa liquid crystal. Kafukufukuyu akutsegula njira zatsopano zogwiritsira ntchito mawonekedwe a liquid crystals kuti aike ma waveguide mu kuchuluka konse kwa zipangizo mongama modulatorschifukwa chazipangizo zojambulira zithunzi.

Chithunzi 1 Ofufuzawo adayika zigawo zamadzimadzi mu ma waveguides opangidwa ndi laser yolembedwa mwachindunji, ndipo chipangizo chosakanikirana chomwe chimachokeracho chingagwiritsidwe ntchito kusintha polarization ya kuwala komwe kumadutsa mu ma waveguides.

Kugwiritsa ntchito ndi ubwino wa kristalo wamadzimadzi mu femtosecond laser waveguide modulation
Ngakhalekusintha kwa kuwalaMu ma waveguides olemba laser a femtosecond adakwaniritsidwa kale makamaka pogwiritsa ntchito kutentha kwapafupi ku ma waveguides, mu kafukufukuyu, polarization idayendetsedwa mwachindunji pogwiritsa ntchito makristalo amadzimadzi. "Njira yathu ili ndi zabwino zingapo zomwe zingatheke: kugwiritsa ntchito mphamvu zochepa, kuthekera kokonza ma waveguides payokha, komanso kuchepetsa kusokonezana pakati pa ma waveguides oyandikana nawo," ofufuzawo akutero. Pofuna kuyesa momwe chipangizochi chimagwirira ntchito, gululo linalowetsa laser mu waveguides ndikusinthira kuwala mwa kusintha mphamvu yamagetsi yomwe imagwiritsidwa ntchito ku layer yamadzimadzi. Kusintha kwa polarization komwe kumawonekera pa zotulukazo kukugwirizana ndi ziyembekezo zamalingaliro. Ofufuzawo adapezanso kuti pambuyo poti kristalo yamadzimadzi yaphatikizidwa ndi waveguide, mawonekedwe a modulation a kristalo yamadzimadzi sanasinthe. Ofufuzawo akugogomezera kuti kafukufukuyu ndi umboni chabe wa lingaliro, kotero padakali ntchito yambiri yoti ichitike ukadaulo usanagwiritsidwe ntchito. Mwachitsanzo, zida zamakono zimasinthira ma waveguides onse mwanjira yomweyo, kotero gululo likugwira ntchito kuti likwaniritse kulamulira kodziyimira payokha kwa waveguides iliyonse.