Ultra-high repetition igipimo pulsed laser

Ultra-high repetition igipimo pulsed laser

Mwisi ya microscopique yimikoranire yumucyo nibintu, ultra-high repetition rate pulses (UHRPs) ikora nkabategetsi basobanutse neza - iranyeganyega inshuro zirenga miriyari kumasegonda (1GHz), ifata urutoki rwa molekile ya selile ya kanseri mumashusho yerekana amashusho, itwara amakuru menshi mugutumanaho kwa fibre optique, no guhuza imirongo yumurongo wa telesikopi. Cyane cyane mugusimbuka kurwego rwo gutahura lidar, terahertz ultra-high repetition igipimo cya pulsed laseri (100-300 GHz) zirimo kuba ibikoresho bikomeye byinjira murwego rwivanga, bivugurura imipaka yimyumvire yibice bitatu hamwe na spatiotemporal manipulation power kurwego rwa foton. Kugeza ubu, ukoresheje microstructures artificiel, nka micro-ring cavities zisaba gutunganya nanoscale kugirango habeho kuvanga imiraba ine (FWM), ni bumwe muburyo bwingenzi bwo kubona igipimo cyinshi cyo gusubiramo optique. Abahanga bibanze mugukemura ibibazo byubwubatsi mugutunganya ibyubaka ultra-nziza, ikibazo cyo guhuza inshuro mugihe cyo gutangira impiswi, nikibazo cyo guhindura imikorere nyuma yimisemburo. Ubundi buryo ni ugukoresha fibre idafite umurongo mwinshi kandi ugakoresha ingaruka zo guhindagurika cyangwa ingaruka za FWM mumyanya ya laser kugirango ushimishe UHRPs. Kugeza ubu, turacyakeneye cyane "igihe cyiza".

Inzira yo kubyara UHRP itera inshinge za ultrafast kugirango zishimishe ingaruka za FWM zidondorwa nka "ultrafast ignition". Bitandukanye na gahunda yo hejuru ya microring ya cavity yavuzwe haruguru isaba guhora ivoma, guhindura neza ibice kugirango igabanye kubyara impiswi, no gukoresha itangazamakuru ridafite umurongo kugirango ugabanye urwego rwa FWM, uku "gutwika" gushingiye kumashanyarazi yibiranga imbaraga za ultrafast kugirango ushimishe FWM, kandi nyuma yo "gutwika", Kugera kuri UHRP.

Igishushanyo cya 1 cyerekana uburyo bwibanze bwo kugera kuri pulse kwishyira hamwe gushingiye ku mbuto ya ultrafast imbuto yimitsi ya fibre ring fibre. Imbuto ziterwa na ultrashort zatewe hanze (igihe T0, inshuro zisubiramo F) ikora nk "inkomoko yo gutwika" kugirango ishimishe umurima ufite imbaraga nyinshi mumyanya yo gusohora. Inyungu zidasanzwe zunguka zikora muburyo bukomatanyije kugirango zihindure ingufu zimbuto zimbuto zishushe zifatika zifatika binyuze mumabwiriza ahuriweho mugihe cyinshuro. Ubu buryo buciye ku mbogamizi zogupompa gakondo: impyisi yimbuto irazimya iyo igeze ku mbibi za FWM, kandi akavuyo ko kugumya kugumya kwishyiriraho imiterere yimisemburo binyuze mu kuringaniza imbaraga zo kunguka no gutakaza, hamwe ninshuro yo gusubiramo impiswi iba Fs (ihuye ninshuro ya FF nigihe cya T cyurwango).

Ubu bushakashatsi kandi bwakoze verisiyo yo kugenzura. Ukurikije ibipimo byemejwe muburyo bwo kugerageza kandi hamwe na 1psultrafast pulse lasernkumurima wambere, kwigana imibare byakozwe mubikorwa byubwihindurize bwigihe cya pulse hamwe ninshuro ziri mumyanya ya laser. Byagaragaye ko impyisi yanyuze mu byiciro bitatu: kugabana impiswi, guhindagurika kwa pulse buri gihe, no gukwirakwiza impiswi imwe mu cyuho cyose cya laser. Igisubizo cyumubare nacyo kigenzura byimazeyo ibiranga kwishyiriraho imiterere yalaser pulse.

Mugukurura ingaruka enye zivanga mumyuka ya fibre fibre ikwirakwizwa na ultrafast imbuto pulse yaka, kubyara ubwabyo no kubungabunga sub-THZ ultra-high repetition frequency pulses (umusaruro uva mumashanyarazi 0.5W nyuma yo kuzimya imbuto) byagezweho neza, bitanga ubwoko bushya bwumucyo kumurima wa lidar: Kuba urwego rwa sub-THZ rushobora kuzamura urwego rwumucyo. Impanuka yo kwikenura igabanya cyane gukoresha ingufu za sisitemu. Imiterere ya fibre yose itanga imikorere ihamye muri 1.5 μm yumutekano wamaso. Urebye ahazaza, iri koranabuhanga riteganijwe gutwara ubwihindurize bwa lidar yimodoka igana kuri miniaturizasiya (ishingiye kuri micro-filtri ya MZI) no kumenya intera ndende (kwagura ingufu kuri> 1W), no kurushaho guhuza ibyifuzo byimyumvire yibidukikije bigoye binyuze mumirongo myinshi yumurongo uhuza hamwe no kugenzura ubwenge.