Laser yothamanga kwambiri yofanana ndi chala cha chala

Kuchita bwino kwambirilaser yothamanga kwambirikukula kwa chala

Malinga ndi nkhani yatsopano yofalitsidwa mu magazini ya Science, ofufuza ku City University of New York awonetsa njira yatsopano yopangira magwiridwe antchito apamwambama laser othamanga kwambiripa nanophotonics. Njira yaying'ono iyi yotsekedwalaserimatulutsa kuwala kofupikitsa kwambiri pa nthawi ya femtosecond (trillionths of a sekondi).

Kutsekedwa kwa Ultrafast modema laserkungathandize kutsegula zinsinsi za nthawi yofulumira kwambiri ya chilengedwe, monga kupangika kapena kusweka kwa ma molecular bond panthawi ya zochita za mankhwala, kapena kufalikira kwa kuwala mu turbulent media. Liwiro lapamwamba, mphamvu ya peak pulse, ndi kufalikira kwa ma lasers otsekedwa ndi mode kumathandizanso ukadaulo wambiri wa photon, kuphatikiza mawotchi a atomiki owoneka bwino, kujambula kwa zamoyo, ndi makompyuta omwe amagwiritsa ntchito kuwala kuwerengera ndikugwiritsa ntchito deta.

Koma ma laser apamwamba kwambiri okhala ndi mode-locked akadali okwera mtengo kwambiri, makina apakompyuta omwe amafuna mphamvu zambiri omwe amagwiritsidwa ntchito m'ma laboratories okha. Cholinga cha kafukufuku watsopano ndikusandutsa izi kukhala makina akuluakulu omwe angapangidwe mochuluka ndikuyikidwa m'munda. Ofufuzawa adagwiritsa ntchito nsanja yopangidwa ndi thin-film lithium niobate (TFLN) kuti apange bwino ndikulamulira molondola ma laser pulses pogwiritsa ntchito zizindikiro zamagetsi zakunja kwa wailesi. Gululi linaphatikiza kuchuluka kwa laser kwa ma semiconductors a class III-V ndi luso lopanga ma pulse la TFLN nanoscale photonic waveguides kuti apange laser yomwe imatulutsa mphamvu yayikulu ya 0.5 watts.

Kuwonjezera pa kukula kwake kochepa, komwe kuli ngati chala cha chala, laser yatsopano yotsekedwa ndi mode ikuwonetsanso zinthu zingapo zomwe ma laser achikhalidwe sangathe kuchita, monga kuthekera kosintha molondola kuchuluka kwa kugunda kwa mpweya wotuluka pamlingo wosiyanasiyana wa 200 megahertz pongosintha mphamvu ya pampu. Gululi likuyembekeza kupeza gwero la chisakanizo chokhazikika, chokhazikika pafupipafupi kudzera mu kukonzanso kwamphamvu kwa laser, komwe ndikofunikira kwambiri pakuzindikira molondola. Ntchito zothandiza zimaphatikizapo kugwiritsa ntchito mafoni am'manja kuzindikira matenda a maso, kapena kusanthula E. coli ndi mavairasi oopsa muzakudya ndi chilengedwe, komanso kulola kuyenda ngati GPS yawonongeka kapena palibe.