Isoko rya laser rigaragara rishobora guhindurwa mu buryo bwa Sub-20 femtosecond

Urumuri rugaragara rwa Sub-20 femtosecondisoko ya laser ihindagurika ishobora guhindurwa

Vuba aha, itsinda ry’abashakashatsi ryo mu Bwongereza ryasohoye ubushakashatsi bushya, ritangaza ko ryashoboye gukora neza urumuri rugaragara rwo mu rwego rwa megawatt rushobora guhindurwa rushobora guhindurwa rushobora guhindurwa rukoresheje ikoranabuhanga rya "sub-20 femtosecond".isoko ya laser ikoresha pulseIyi soko ya laser ikoresha pulse, yihuta cyanelaser ya fibreSisitemu ifite ubushobozi bwo gukora imirasire ifite uburebure bw'uburebure bushobora guhinduka, igihe gito cyane, ingufu zigera kuri nanojoule 39, n'imbaraga zirenga megawati 2, bifungura amahirwe mashya yo gukoresha mu nzego nka ultra-speed spectroscopy, biology imaging, no gutunganya inganda.

Ikintu cy’ingenzi muri ubu buryo ni uguhuza uburyo bubiri bugezweho: "Gain-Managed nonlinear Amplification (GMNA)" na "Resonant Dispersive Wave (RDW) emission". Mu bihe byashize, kugira ngo haboneke impumuro ngufi za ultrash short zishobora guhinduka cyane, lasers zihenze kandi zikomeye za titanium-sapphire cyangwa amplifiers optical parametric zakenerwaga cyane. Ibi bikoresho ntibyari bihenze gusa, byari binini, kandi bigoye kubungabunga, ahubwo byari binagabanijwe n'umuvuduko muto wo gusubiramo no gukosora. Igisubizo cya fibre cyakozwe kuri iyi nshuro nticyoroshya gusa imiterere ya sisitemu ahubwo kinagabanya cyane ikiguzi n'uburemere. Gituma habaho gukora sub-20 femtosecond, ishobora guhindurwa kugeza kuri nanometero 400 kugeza kuri 700 no kurenza impumuro zikomeye ku muvuduko wo gusubiramo wa 4.8 MHz. Itsinda ry'ubushakashatsi ryageze kuri iki gikorwa binyuze mu buryo bwa sisitemu bwateguwe neza. Ubwa mbere, bakoresheje oscillator ytterbium fiber oscillator irinda polarization ishingiye kuri nonlinear amplification ring mirror (NALM) nk'isoko y'imbuto. Iyi miterere ntiyemeza gusa ko sisitemu ihoraho igihe kirekire, ahubwo inarinda ikibazo cyo kwangirika kw'ibikoresho by'umubiri bitera imbaraga. Nyuma yo gutera imbaraga no gukanda imitsi, imbuto zishyirwa mu cyiciro cya GMNA. GMNA ikoresha uburyo bwo guhindura imiterere y'ingufu no gukwirakwiza imiterere y'ingufu mu buryo butangana mu mitsi kugira ngo igere ku kwaguka kwa spectral no gukora imitsi migufi cyane ifite umurongo ugororotse, amaherezo igakandamizwa kugeza ku masegonda 40 binyuze mu guteranya. Mu cyiciro cyo gukora RDW, abashakashatsi bakoresheje imitsi icyenda yakozwe ubwayo irwanya resonance hollow-core. Ubu bwoko bwa fibre optique bufite igihombo gito cyane mu gice cy'ingufu cya pompe no mu gace k'urumuri rugaragara, bigatuma ingufu zihindurwa neza kuva kuri pompe zijya ku muraba utandukanye kandi birinda kubangamira guterwa n'umutsi utera imbaraga utakaza byinshi. Mu bihe byiza, ingufu zituruka ku muvuduko w’imirasire y ...

Ubu bushakashatsi ntibufite akamaro gakomeye gusa mu rwego rw'ibanze rwa fotoniki, ahubwo bunafungura imiterere mishya ku nganda no mu nzego zikoreshwa. Urugero, mu nzego nka multi-photon microscopy imaging, ultrafast time-resolved spectroscopy, gutunganya ibikoresho, precision medicine, n'ubushakashatsi bwa ultrafast nonlinear optics, ubu bwoko bushya bw'urumuri ruciriritse, rufite ubushobozi kandi ruhendutse, buzaha abakoresha ibikoresho bidasanzwe n'ubushobozi bwo koroha. Cyane cyane mu bihe bisaba gusubiramo inshuro nyinshi, imbaraga nyinshi n'amajwi magufi cyane, ubu buryo nta gushidikanya ko bufite irushanwa rikomeye kandi bufite ubushobozi bwo kwamamaza ugereranije na titanium-saphire gakondo cyangwa optical parametric amplification systems.

Mu gihe kizaza, itsinda ry’abashakashatsi rirateganya kunoza kurushaho sisitemu, nko guhuza imiterere iriho ubu irimo ibice byinshi by’urumuri rw’ahantu higenga mu migozi y’urumuri, cyangwa no gukoresha oscillator imwe ya Mamyshev kugira ngo isimbuze oscillator iriho ubu n’imvange y ...

Ishusho ya 1. Ishusho y'icyitegererezo cy'uburyo laser ikoresha pulse