Uniqueultrafast laserchikamu chechipiri
Dispersion and pulse spreading: Boka kunonotsa kupararira
Imwe yematambudziko akaomarara ehunyanzvi anosanganikwa nawo kana uchishandisa ultrafast lasers kuchengetedza nguva yeiyo ultra-short pulses yakatanga kuburitswa nelaser. Ultrafast pulses inonyanya kukanganiswa nekukanganiswa kwenguva, izvo zvinoita kuti pulses irebe. Mhedzisiro iyi inowedzera zvakanyanya sezvo nguva yekurova kwekutanga inopfupika. Nepo ultrafast lasers inogona kuburitsa pulses nehurefu hwemasekonzi makumi mashanu, inogona kukwidziridzwa nenguva nekushandisa magirazi nemalenzi kuendesa kupuruzira kunzvimbo yainonangwa, kana kungoendesa pulse kuburikidza nemhepo.
Panguva ino kukanganisa kunoyerwa pachishandiswa chiyero chinonzi group delayed dispersion (GDD), inozivikanwawo sesecond-order dispersion. Kutaura zvazviri, kunewo mazwi ekupararira kwepamusoro-soro anogona kukanganisa nguva yekugoverwa kwe-ultrafart-laser pulses, asi mukuita, zvinowanzokwana kungoongorora maitiro eGDD. GDD inguva-inotsamira kukosha iyo inoenderana nemutsara kune ukobvu hwechinhu chakapihwa. Transmission optics senge lenzi, hwindo, uye zvinhu zvechinangwa zvinowanzova nehunhu hwakanaka hweGDD, izvo zvinoratidza kuti kana mapombi akadzvanywa anogona kupa maoptiki ekutapurirana kureba kupfuura ayo anoburitswaLaser systems. Zvikamu zvine ma frequency epasi (kureva, kureba kwemasaisai) zvinopararira nekukurumidza kupfuura zvikamu zvine ma frequency epamusoro (kureva, mapfupi masaisai). Sezvo pulse ichipfuura nenyaya yakawanda uye yakawanda, iyo wavelength mumhepo icharamba ichiwedzera uye mberi munguva. Kwenguva pfupi yekupuruzira, uye nekudaro yakafara bandwidths, mhedzisiro iyi inowedzera kuwedzeredzwa uye inogona kuguma nekukosha kwepulse nguva kukanganisa.
Ultrafast laser application
spectroscopy
Kubva pakauya ultrafast laser sosi, spectroscopy yanga iri imwe yenzvimbo dzavo dzekushandisa. Nekudzikisa nguva yekupuruzira kusvika kufemtoseconds kana kunyange attoseconds, maitiro ane simba mufizikisi, chemistry uye biology izvo zvanga zvisingabviri kucherechedzwa zvino zvinogona kuwanikwa. Imwe yematanho akakosha kufamba kweatomu, uye kucherechedzwa kwekufamba kweatomu kwakavandudza kunzwisisa kwesainzi kwemaitiro akakosha senge molecular vibration, molecular dissociation uye kufambisa simba mumapuroteni ephotosynthetic.
bioimaging
Peak-simba ultrafast lasers inotsigira nonlinear maitiro uye inovandudza kugadzirisa kwebiological imaging, senge yakawanda-photon microscope. Mune multi-photon system, kuitira kuti ibudise chiratidzo chisingaiti kubva kune biological medium kana fluorescent chinangwa, mafotoni maviri anofanira kupindirana munzvimbo nenguva. Iyi nzira isina mutsara inovandudza kugadzirisa kwekufungidzira nekudzikisa zvakanyanya kumashure fluorescence masaini anotambudza zvidzidzo zveimwe-photon maitiro. Iyo yakareruka yechiratidzo kumashure inoratidzwa. Iyo diki yekunakidzwa nharaunda yemultiphoton microscope inodzivirirawo phototoxicity uye inoderedza kukuvadzwa kumuenzaniso.
Mufananidzo 1: Muenzaniso dhayagiramu yenzira yedanda mune yakawanda-photon maikorosikopu kuedza
Laser zvinhu kugadzirisa
Ultrafast laser masosi yakashandurawo laser micromachining uye kugadzirwa kwezvinhu nekuda kweiyo yakasarudzika nzira iyo ultrashort pulses inodyidzana nezvinhu. Sezvambotaurwa, kana tichikurukura nezveLDT, iyo ultrafast pulse duration inokurumidza kupfuura chiyero chenguva yekupisa kupisa mulatisi yezvinhu. Ultrafast lasers inogadzira diki diki-yakakanganiswa nzvimbo panenanosecond pulsed lasers, zvichikonzera kurasikirwa kwakaderera kwekucheka uye kunyatsoita machining. Iyi nheyo inoshandawo kune zvikumbiro zvekurapa, uko iyo yakawedzera chaiyo yeultrafart-laser yekucheka kunobatsira kuderedza kukuvadzwa kune yakatenderedza tishu uye inovandudza ruzivo rwemurwere panguva yekuvhiyiwa kwelaser.
Attosecond pulses: ramangwana re Ultrafast lasers
Sezvo tsvakiridzo ichienderera mberi nekufambisira mberi ultrafast lasers, nyowani uye yakagadziridzwa magetsi masosi ane mapfupi pulse durations ari kugadzirwa. Kuti uwane ruzivo rwekukurumidza maitiro emuviri, vaongorori vazhinji vari kutarisa nezve chizvarwa cheattosecond pulses - inenge 10-18 s muyakanyanya ultraviolet (XUV) wavelength range. Attosecond pulses inobvumira kuteedzera kweelectron motion uye kunatsiridza manzwisisiro edu emagetsi chimiro uye quantum mechanics. Nepo kubatanidzwa kweXUV attosecond lasers kuita maindasitiri maitiro kusati kwave kufambira mberi, tsvakiridzo inoenderera mberi uye kufambira mberi mumunda kuchatosundidzira tekinoroji iyi kubva mulab uye mukugadzira, sezvakange zvakaita femtosecond uye picosecond.Laser sources.
Nguva yekutumira: Jun-25-2024