-HlukileI-Ultrafast Laseringxenye emibili
Ukusakazeka kanye nokugxuma ukusakazeka: Ukuhleleka kweqembu Ukuhleleka
Enye yezinselelo zezobuchwepheshe ezinzima kakhulu ezihlangabezana nazo lapho kusetshenziswa ama-lasers e-Ultrafast ukugcina isikhathi sama-pulses afushane e-ultra ekuqaleni akhishwe yii-laser. Ama-pulses we-Ultrafast atholakala kakhulu ekuhlanekezelweni kwesikhathi, okwenza ama-pulses ade. Lo mthelela uba mubi njengoba isikhathi sokuncipha kokuqala. Ngenkathi ama-LANsers e-Ultrafast angakhipha ama-pulses anesikhathi semizuzwana engama-50, angakhuliswa ngesikhathi ngokusebenzisa izibuko namalensi ukudlulisa ukushaya kwendawo okuqondiwe kuyo, noma nje kudlulise nje ukushaya umoya.
Lesi sikhathi sokuhlanekezela silinganiswa kusetshenziswa isilinganiso esibizwa ngeqembu lokuhlakazeka kweqembu (GDD), esaziwa nangokuthi ukuhlakazwa kwe-oda lesibili. Eqinisweni, kukhona nemigomo yokuhlakazeka ye-oda ephakeme engathinta ukusatshalaliswa kwesikhathi kwe-UltraFart-Laser Pulses, kodwa ekusebenzeni, kuvame ukwanele nje ukuhlola umphumela we-GDD. I-GDD inani elithembeke ngokuvamisile elilingana ngokuqondile ngokulingana kwezinto ezinikeziwe. Ukuhambisa i-Optics enjengelens, iwindi, kanye nezinto ezinengqondo ngokuvamile zinamanani amahle we-GDD, okubonisa ukuthi ama-pulses acindezelwe uma akwazi ukunikeza ama-optics okuhambisa isikhathi eside kunalokho okuholwa yiwoAmasistimu we-Laser. Izakhi ezinamafrikhwensi aphansi (okusho, ama-wavelength amade) asakazeka ngokushesha kunezakhi ezinamafrikhthi aphezulu (okusho, ama-wavelength afushane). Njengoba i-Pulse idlula kudalulwa ngokwengeziwe, i-wavengethth emgodini izoqhubeka nokunweba futhi ngokuqhubekayo. Ngesikhathi esifushane se-Pulse, ngakho-ke ama-bandwidth abanzi, lo mphumela weqisa futhi futhi ungaholela ekuhlanekezinisweni kwesikhathi esibalulekile sokuhlanekezela.
Izicelo ze-Laser ze-Ultrafast
spectroscopy
Kusukela add advent of Ultrafast laser imithombo, i-spectroscopy ibingenye yezindawo zabo ezibalulekile zohlelo lokusebenza. Ngokunciphisa isikhathi sokushaya kwama-femtoseconds noma ngisho nama-atoseconds, izinqubo ezinamandla ku-physics, amakhemikhali kanye ne-biology ezakungenakwenzeka ngokomlando ukuze zibonakale. Enye yezinqubo ezibalulekile ukunyakaza kwe-athomu, futhi ukubonwa kwe-athomu kuthuthukise ukuqonda kwesayensi ngezinqubo eziyisisekelo njengokudlidliza kwamangqamuzana, ukukhishwa kwamangqamuzana kanye nokudluliswa kwamandla kumaphrotheni we-photosynththtic amaprotheni ezithombe.
ukugibela
I-Peak-Power Ultrafast Lasers isekela izinqubo ezingalingani futhi yenza ngcono ukuxazululwa kokucabanga okungokwemvelo, njenge-multi-Photon Microscopy. Ngohlelo lwe-Photon Multi-Photon, ukuze ukhiqize isiginali engajwayelekile kusuka kuthagethi ye-biological medium noma i-fluorescent, izithombe ezimbili kufanele zinciphise esikhaleni nangesikhathi. Lo mshini ongahlangene ne-nonlerinear uthuthukisa ukulungiswa kokucabanga ngokunciphisa kakhulu amasignali wangemuva we-fluorescence athi izifundo zezinqubo ze-photon eyodwa. Isizinda sesiginali esenziwe lula siyaboniswa. Isifunda esincane sokuxoxa se-microscope ye-multiphoton futhi sivimbela i-phototoxicity futhi sinciphise ukulimala kwesampula.
Umdwebo 1: Umdwebo wesibonelo wendlela ye-beam ku-microscope yokuhlola okuningi
Ukucutshungulwa Kwezinto Ezibonakalayo ze-Laser
Imithombo ye-Laser ye-Ultrafast nayo iguqule i-laser micromachining kanye nokusebenza kwezinto ezibonakalayo ngenxa yendlela ehlukile yokuthi ama-pulses e-ultrashort exhumana nezinto zokwakha. Njengoba kushiwo ngaphambili, lapho uxoxa nge-LDT, isikhathi se-ultrafast pulse isikhathi sishesha ukwedlula isilinganiso sesikhathi sokushisa kokushisa esikhwameni sezinto ezibonakalayo. Ama-Lasers e-Ultrafast akhiqiza indawo encane ethinteke kakhulu kunokubaI-Nanosecond idonsela ama-lasers, okuholele ekulahlekelweni kwe-incision okuphansi okuphansi kanye nemishini eqondile eqondile. Lesi simiso sisebenza futhi kwizicelo zezokwelapha, lapho ukunqunywa okwengeziwe kokusika kwe-UltraAFart-Laser kusiza ukunciphisa ukulimala kwezicubu ezizungezile futhi kuthuthukise isipiliyoni sesiguli ngesikhathi sokuhlinzwa kwe-laser.
I-Atosecond Pulses: Ikusasa le-Ultrafast Lasers
Njengoba ucwaningo luyaqhubeka nokuthuthukisa ama-ultrafast lasers, imithombo elula futhi ethuthukisiwe yokukhanya enezikhathi ezimfishane ze-Pulse. Ukuthola ukuqonda ngezinqubo ezisheshayo zomzimba, abacwaningi abaningi bagxile esizukulwaneni se-atosecond pulses - cishe nge-10-18 s ku-waveghth extravilet (xuv) waventh. I-Atosecond Pulses ivumela ukulandelwa kokunyakaza kwe-elektroni futhi kuthuthukise ukuqonda kwethu ngesakhiwo se-elekthronikhi kanye ne-quantum mechanics. Ngenkathi ukuhlanganiswa kwama-xuv atosecond ama-lasers ezinqumweni zezimboni akukavumi nenqubekela phambili enkulu, ucwaningo oluqhubekayo kanye nokuthuthuka emkhakheni kuzocishe kube yilobu buchwepheshe kuleli labhu nakwi-picosecondImithombo ye-Laser.
Isikhathi sePosi: Jun-25-2024