Yakasiyanalaser inokurumidza zvikuruchikamu chechipiri
Kupararira uye kupararira kwemoyo: Kunonoka kupararira kweboka
Chimwe chezvinetso zvakaoma zvikuru zvehunyanzvi zvinosangana nazvo pakushandisa ma-laser e-ultrafast kuchengetedza nguva ye-ultra-short pulses inoburitswa pakutanga nelaser. Mapuroteni eUltrafast anogona kukanganisa nguva, izvo zvinoita kuti mapuroteni arebe. Izvi zvinowedzera kuipa sezvo nguva yepulse yekutanga ichipfupika. Kunyange zvazvo ma laser eUltrafast achigona kuburitsa mapuroteni kwenguva yemasekondi makumi mashanu, anogona kuwedzerwa nekufamba kwenguva nekushandisa magirazi nemalenzi kuendesa pulse kunzvimbo yaunoda, kana kutotumira pulse nemhepo.
Kukanganiswa kwenguva iyi kunoyerwa uchishandisa chiyero chinonzi group delayed dispersion (GDD), chinozivikanwawo se second-order dispersion. Kutaura zvazviri, kunewo mazwi ekupararira kwepamusoro anogona kukanganisa kugoverwa kwenguva kwema ultrafart-laser pulses, asi mukuita, zvinowanzo kukwana kungoongorora mhedzisiro yeGDD. GDD inhamba inoenderana ne frequency iyo inoenderana nehupamhi hwechinhu chakapihwa. Transmission optics dzakadai se lens, window, uye objective components dzinowanzova ne positive GDD values, izvo zvinoratidza kuti kana ma pulses akamanikidzwa anogona kupa transmission optics nguva yakareba ye pulse kupfuura iyo inoburitswa nemasisitimu elaser. Zvikamu zvine mafrequency akaderera (kureva, mawavelength akareba) zvinopararira nekukurumidza kupfuura zvikamu zvine mafrequency akakwira (kureva, mawavelength mapfupi). Sezvo pulse ichipfuura nepakati pezvinhu zvakawanda, wavelength iri mupulse icharamba ichienderera mberi nekufamba kwenguva. Kune nguva pfupi yepulse, uye nekudaro bandwidths yakafara, mhedzisiro iyi inowedzera kuwedzeredzwa uye inogona kukonzera kukanganisa kukuru kwenguva yepulse.
Mashandisirwo eLaser eUltrafast
spectroscopy
Kubva pakatanga kushandiswa kwezvishandiso zve laser zvinokurumidza, spectroscopy yave iri imwe yenzvimbo huru dzavanoshandisa. Nekuderedza nguva yekurova kwemoyo kusvika kuma femtoseconds kana kunyange ma attoseconds, maitiro anochinja-chinja mufizikisi, kemesitiri uye biology ayo aisagona kuonekwa kare anogona kuwanikwa ikozvino. Imwe yemaitiro akakosha kufamba kweatomu, uye kutarisa kufamba kweatomu kwakavandudza kunzwisisa kwesainzi kwemaitiro ekutanga akadai sekuzunguzika kwemamorekuru, kupatsanurwa kwemamorekuru uye kufambiswa kwesimba mumapuroteni ephotosynthetic.
mifananidzo yehupenyu
MaLaser epamusoro-soro anotsigira maitiro asina kurongeka uye anovandudza kugona kwemifananidzo yezvebhayoloji, senge multi-photon microscopy. Muhurongwa hwe multi-photon, kuti pave nechiratidzo chisina kurongeka kubva kune chinhu chebhayoloji kana chinangwa che fluorescent, ma photon maviri anofanira kupindirana munzvimbo nenguva. Iyi nzira isina kurongeka inovandudza kugona kwemifananidzo nekuderedza zvakanyanya zviratidzo zve background fluorescence zvinotambudza zvidzidzo zve single-photon processes. Kumashure kwechiratidzo kwakapfava kunoratidzwa. Nzvimbo diki yekufungidzira ye multiphoton microscope inodzivirirawo fototoxicity uye inoderedza kukuvara kwemuenzaniso.
Mufananidzo 1: Muenzaniso wedhayagiramu yenzira yemuti mukuyedza kwemaikorosikopu akawanda ane photon
Kugadziriswa kwezvinhu zveLaser
Manyuko e-laser e-Ultrafast akachinjawo kugadzirwa kwe-laser micromachining uye kugadziriswa kwezvinhu nekuda kwenzira yakasiyana iyo ma-pulse mapfupi anoshandiswa nezvinhu. Sezvambotaurwa, pakukurukura nezveLDT, nguva ye-pulse ye-ultrafast inokurumidza kupfuura chiyero chenguva yekupararira kwekupisa mu-lattice yezvinhu. Ma-laser e-Ultrafast anogadzira nzvimbo diki kwazvo inokanganiswa nekupisa kupfuuralasers dze nanosecond pulsed, zvichikonzera kurasikirwa kwakaderera kwekucheka uye machining akanyatsojeka. Iyi nheyo inoshandawo kune zvinoshandiswa pakurapa, uko kuwedzera kwakanyatsojeka kwekucheka kwe-ultrafart-laser kunobatsira kuderedza kukuvara kwenyama yakapoteredza uye kunatsiridza ruzivo rwemurwere panguva yekuvhiyiwa nelaser.
Attosecond pulses: ramangwana rema lasers anokurumidza
Sezvo tsvakurudzo ichienderera mberi nekusimudzira ma-laser anokurumidza kukurumidza, manyuko matsva echiedza ane nguva pfupi yekurova kwemoyo ari kugadzirwa. Kuti vawane nzwisiso yemaitiro emuviri anokurumidza, vaongorori vazhinji vari kutarisa pakugadzirwa kwema-attosecond pulses - angangoita 10-18 masekondi muhuwandu hwewavelength ye-ultraviolet (XUV). Ma-attosecond pulses anobvumira kuteverwa kwemafambiro emaerekitironi uye kuvandudza kunzwisisa kwedu kwechimiro chemagetsi uye quantum mechanics. Kunyange hazvo kubatanidzwa kwema-XUV attosecond lasers mumabasa emaindasitiri kusati kwaita kufambira mberi kukuru, kutsvagisa kuri kuenderera mberi uye kufambira mberi mumunda uyu kuchabvisa tekinoroji iyi murabhoritari uye mukugadzira, sezvazvaive zvakaita nefemtosecond nepicosecond.masosi elaser.
Nguva yekutumira: Chikumi-25-2024