Chinja kumhanya kwekurova kwemoyo kwelaser ine simba guru re ultrashort
MaLaser mapfupi-pfupi anowanzoreva maLaser ane upamhi hwemapulse emakumi nemazana emafemtoseconds, simba repamusoro rematerawatts nemapetawatts, uye simba rawo rechiedza rakanangana rinodarika 1018 W/cm2. Laser mapfupi-pfupi uye sosi yayo yemwaranzi inogadzirwa uye sosi yezvikamu zvine simba rakawanda zvine kukosha kwakasiyana-siyana mumabasa akawanda ekutanga ekutsvagisa akadai sefizikisi ine simba rakawanda, fizikisi yezvikamu, fizikisi yeplasma, fizikisi yenyukireya uye astrophysics, uye kubuda kwemhedzisiro yekutsvagisa kwesainzi kunogona kushandira maindasitiri akakodzera etekinoroji yepamusoro, hutano hwekurapa, simba rezvakatipoteredza uye kuchengetedzwa kwenyika. Kubva pakagadzirwa tekinoroji yekuwedzera pulse muna 1985, kubuda kwewatt yekutanga yepasi rose.laserMuna 1996 uye kupedzwa kwelaser yekutanga yepasi rose ine mawatt gumi muna 2017, chinangwa chelaser ine mawatt gumi munguva yakapfuura chaive chekuwana "chiedza chakanyanya kusimba". Mumakore achangopfuura, zvidzidzo zvakaratidza kuti kana tichida kuchengetedza mapulse esuper laser, kana kumhanya kwekutumira kwepulse kwelaser ine mawatt gumi kunogona kudzorwa, zvinogona kuunza zvakapetwa kaviri nehafu yekuedza mune mamwe maapplication emuviri, izvo zvinotarisirwa kuderedza huwandu hwemawatt mashoma.midziyo yelaser, asi kuvandudza kushanda kwayo mukuyedza kwefizikisi yelaser yepamusoro-soro.
Kukanganiswa kwemoyo wepamberi pelaser ine simba re ultra-strong ultrashort
Kuti simba repamusoro risvike pasi pesimba shoma, upamhi hwepulse hunoderedzwa kusvika kumasekonzi makumi maviri kusvika makumi matatu nehafu nekuwedzera bandwidth yekuwedzera. Simba repulse relaser ye10-beak-watt ultra-short rinosvika mazana matatu ejoules, uye chiyero chidiki chekukuvadzwa kwecompressor grating chinoita kuti beam aperture ipfuure mazana matatu nemazana matatu. Beam repulse rine 20 ~ 30 femtosecond pulse width uye 300 mm aperture zviri nyore kutakura spatiotemporal coupling distortion, kunyanya distortion yepulse front. Mufananidzo 1 (a) unoratidza spatio-temporal separation yepulse front nephase front inokonzerwa nekupararira kwebeam role, uye wekutanga unoratidza "spatio-temporal tilt" zvichienzaniswa nekupedzisira. Imwe ndiyo "curvature yespace-time" yakaoma zvikuru inokonzerwa ne lens system. Mufananidzo 1 (b) unoratidza mhedzisiro ye ideal pulse front, integrated pulse front uye bent pulse front pa spatio-temporal distortion ye light field iri pachinangwa. Nekuda kweizvozvo, simba rechiedza chakanangana rinodzikira zvakanyanya, izvo zvisingakodzeri kushandiswa kwakasimba kwelaser ye super ultra-short.
Mufananidzo 1 (a) kurereka kwepamberi pepulse kunokonzerwa neprism negrating, uye (b) mhedzisiro yekukanganiswa kwepamberi pepulse pamunda wechiedza chespace-time pane chinangwa
Kudzora kumhanya kwepulse kwe ultra-stronglaser pfupi pfupi
Parizvino, mwenje yeBessel inogadzirwa ne conical superposition yemafungu emuchadenga yakaratidza kukosha kwekushandiswa mu high field laser physics. Kana danda re pulsed rakaiswa pamusoro pe conically rine axisymmetric pulse front distribution, saka geometric centre intensity ye X-ray wave pack yakagadzirwa sezvakaratidzwa muMufananidzo 2 inogona kuva constant superluminal, constant subluminal, accelerated superluminal, uye decelerated subluminal. Kunyangwe musanganiswa we deformable mirror uye phase type spatial light modulator inogona kugadzira argumentally spatio-temporal shape ye pulse front, uye yozoburitsa argumentally controllable transmission speed. Physical effect iri pamusoro apa uye modulation technology yayo inogona kushandura "distortion" ye pulse front kuita "control" ye pulse front, uye yozoona chinangwa chekuchinja transmission speed ye ultra-strong ultra-short laser.
Mufananidzo 2. (a) chiedza chinokurumidza kupfuura chiedza nguva dzose, (b) chiedza chisingaperi, (c) chinokurumidza kupfuura chiedza, uye (d) chiedza chipfupi chinobuda nechiedza chiri pakati penzvimbo yenzvimbo yechiedza chiri pakati pe ...
Kunyangwe kuwanikwa kwe pulse front distortion kuri kare kupfuura super ultra-short laser, kwave kuri kunetsekana zvikuru pamwe nekugadzirwa kwe super ultra-short laser. Kwenguva yakareba, hazvina kubatsira pakuzadzikiswa kwechinangwa chikuru che super ultra-short laser - ultra-high focusing light intensity, uye vaongorori vanga vachishanda kudzvinyirira kana kubvisa distortion yakasiyana-siyana ye pulse front. Nhasi, apo "pulse front distortion" yave "pulse front control", yawana kudzora kumhanya kwe transmission ye super ultra-short laser, ichipa nzira itsva nemikana mitsva yekushandiswa kwe super ultra-short laser mu high-field laser physics.
Nguva yekutumira: Chivabvu-13-2024