Matsanancin-high maimaitu rate pulsed Laser
A cikin duniyar microscopic na hulɗar tsakanin haske da kwayoyin halitta, ultra-high repetition rate pulses (UHRPs) suna aiki a matsayin madaidaicin masu mulki na lokaci - suna yin oscillate fiye da sau biliyan daya a cikin dakika (1GHz), suna ɗaukar hotunan yatsa na kwayoyin cutar kansa a cikin hoto mai ban mamaki, suna ɗauke da adadi mai yawa na bayanai a cikin sadarwar fiber na gani, da daidaita ma'aunin tauraron dan adam. Musamman a cikin tsallen girman tsinkayar lidar, terahertz ultra-high repetition rate pulsed lasers (100-300 GHz) suna zama kayan aiki masu ƙarfi don kutsawa cikin layin tsangwama, suna sake fasalin iyakoki na tsinkaye mai girma uku tare da ikon sarrafa sararin samaniya a matakin photon. A halin yanzu, yin amfani da ƙananan ƙananan sassa na wucin gadi, kamar ƙananan ramukan zobe waɗanda ke buƙatar daidaiton sarrafa nanoscale don samar da haɗaɗɗun raƙuman ruwa huɗu (FWM), yana ɗaya daga cikin manyan hanyoyin samun ƙwararrun ƙwararrun ƙwararrun maimaitawa. Masana kimiyya suna mai da hankali kan magance matsalolin injiniya a cikin sarrafa sifofi masu kyau, matsalar daidaita mita yayin fara bugun bugun jini, da kuma matsalar ingantaccen juzu'i bayan tsara bugun bugun jini. Wata hanya kuma ita ce yin amfani da filaye marasa kan layi da amfani da tasirin rashin zaman lafiya ko tasirin FWM a cikin rami na Laser don tada UHRPs. Ya zuwa yanzu, har yanzu muna buƙatar “mai tsara lokaci” mai ƙwazo.
Tsarin samar da UHRP ta hanyar allurar ultrafast pulses don farantawa tasirin FWM mai lalacewa an kwatanta shi da "ƙaramar ƙonewa". Daban-daban da na sama da aka ambata na wucin gadi microring cavity makirci wanda ke buƙatar ci gaba da yin famfo, daidaitaccen daidaitawa don sarrafa bugun jini, da yin amfani da kafofin watsa labarai marasa ƙarfi don rage madaidaicin FWM, wannan “ƙonawa” ya dogara da ƙimar ƙarfin ƙarfin kuzarin bugun jini kai tsaye zuwa FWM kai tsaye, kuma bayan “cirewa”, Cimma UHRPtain.
Hoto na 1 yana misalta ainihin hanyar cimma tsarin haɗin kai na bugun jini dangane da ultrafast iri bugun bugun jini na ɓarke cavities na zobe na fiber. Ƙwararren iri na ultrashort na waje (lokacin T0, maimaitawa F) yana aiki a matsayin "tushen kunnawa" don tada babban filin bugun bugun jini a cikin kogon tarwatsewa. Samfurin samun na cikin salula yana aiki tare da haɗin gwiwa tare da mai siffa mai siffa don canza ƙarfin bugun zuriyar iri zuwa martani mai siffa mai siffar tsefe ta hanyar ƙa'idar haɗin gwiwa a cikin yanki-mita lokaci. Wannan tsari yana karya ta hanyar iyakoki na ci gaba da yin famfo na gargajiya: bugun zuriyar iri yana kashewa lokacin da ya kai matakin ɓarkewar FWM, kuma rami mai tarwatsewa yana kula da yanayin tsara kai na bugun jini ta hanyar ma'auni mai ƙarfi na riba da asara, tare da mitar maimaita bugun bugun jini shine Fs (daidai da intrinsic da mita na FFv).
Wannan binciken kuma ya gudanar da tabbatar da ka'idar. Dangane da sigogin da aka ɗauka a cikin saitin gwaji kuma tare da 1psultrafast bugun jini Lasera matsayin filin farko, an gudanar da siminti na lamba akan tsarin juyin halitta na yankin lokacin bugun bugun jini da mita a cikin rami na Laser. An gano cewa bugun jini ya bi matakai uku: tsagawar bugun jini, bugun bugun jini lokaci-lokaci, da kuma rarraba kayan aikin bugun jini a ko'ina cikin kogin Laser. Wannan sakamako na lamba kuma yana tabbatar da cikakken halayen tsara kai nabugun jini Laser.
Ta hanyar haifar da tasirin haɗakarwar igiyoyi huɗu a cikin kogon zobe na fiber mai ɓarna ta hanyar ƙwanƙwasa ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar cuta, tsara tsararrun tsararru da kiyaye juzu'in mitar mitar THZ ultra-high maimaitawar bugun jini (tsayayyen fitarwa na ƙarfin 0.5W bayan kashe iri) an samu nasarar cimma, samar da sabon nau'in tushen haske don madaidaicin ma'aunin ma'aunin ma'auni. millimeter darajar. Siffar ƙwanƙwasa ƙwanƙwasa tana rage yawan amfani da makamashi na tsarin. Tsarin duk-fiber yana tabbatar da babban aiki na kwanciyar hankali a cikin rukunin aminci na ido na 1.5 μm. Neman zuwa gaba, ana tsammanin wannan fasaha za ta fitar da juyin halittar lidar da aka ɗora a cikin abin hawa zuwa ƙarami (dangane da ƙananan filtata na MZI) da kuma gano dogon zango (ƙaramar ƙarfi zuwa> 1W), kuma ta ƙara daidaitawa da buƙatun tsinkaye na mahalli masu rikitarwa ta hanyar haɗaɗɗen ƙonewa mai tsayi da yawa da ƙa'idodi masu hankali.
Lokacin aikawa: Jul-08-2025