Ukadaulo wapamwamba kwambiri wa ultrafast wafer laser

Wafer wochita mwachangu kwambirilaser luso
Mphamvu zapamwambaultrafast lasersamagwiritsidwa ntchito kwambiri muzopangapanga zapamwamba, zambiri, ma microelectronics, biomedicine, chitetezo cha dziko ndi minda yankhondo, ndipo kafukufuku wofunikira wasayansi ndi wofunikira kulimbikitsa zatsopano zasayansi ndiukadaulo komanso chitukuko chapamwamba. Kagawo kakang'onolaser systemndi ubwino wake wa mphamvu zambiri, mphamvu yaikulu ya pulse ndi khalidwe labwino kwambiri lamtengo wapatali limafunikira kwambiri mu sayansi ya attosecond, kukonza zinthu ndi magawo ena a sayansi ndi mafakitale, ndipo wakhala akukhudzidwa kwambiri ndi mayiko padziko lonse lapansi.
Posachedwapa, gulu lofufuza ku China lagwiritsa ntchito gawo lodzipangira lokha lopindika komanso ukadaulo wokulitsa luso lokulitsa kuti likwaniritse magwiridwe antchito apamwamba (kukhazikika kwapamwamba, mphamvu yayikulu, mtengo wamtengo wapamwamba, kugwiritsa ntchito bwino kwambiri) chophatikizira chofulumira kwambiri.laserzotuluka. Kupyolera mu kamangidwe ka regeneration amplifier patsekeke ndi kulamulira kutentha pamwamba ndi kukhazikika makina a kristalo chimbale pabowo, linanena bungwe laser wa kugunda mphamvu imodzi> 300 μJ, kugunda m'lifupi <7 ps, mphamvu avareji> 150 W zimatheka. , ndipo kutembenuka kwapamwamba kwambiri kwa kuwala kwa kuwala kumatha kufika pa 61%, yomwe ilinso mphamvu yapamwamba kwambiri ya kutembenuka kwa kuwala yomwe yanenedwa pano. Mtengo wamtengo wapatali wa M2<1.06@150W, 8h kukhazikika RMS<0.33%, kupindula uku kukuwonetsa kupita patsogolo kofunikira mukuchita bwino kwambiri kwa laser wafer yamphamvu kwambiri, yomwe ipereka mwayi wambiri wogwiritsa ntchito ma laser amphamvu kwambiri.

Kubwereza pafupipafupi, njira yowonjezeretsa mphamvu yowonjezera mphamvu
Kapangidwe ka kagawo kakang'ono ka laser amplifier akuwonetsedwa mu Chithunzi 1. Zimaphatikizapo gwero la mbewu za fiber, kagawo kakang'ono ka laser mutu ndi regenerative amplifier cavity. Chingwe cha ytterbium-doped fiber oscillator chokhala ndi mphamvu pafupifupi 15 mW, kutalika kwapakati kwa 1030 nm, kugunda kwa 7.1 ps ndi kubwereza kwa 30 MHz kunagwiritsidwa ntchito ngati gwero la mbewu. Mutu wa wafer laser umagwiritsa ntchito Yb yodzipangira tokha: YAG kristalo yokhala ndi mainchesi 8.8 mm ndi makulidwe a 150 µm ndi makina opopa a 48-stroke. Gwero la mpope limagwiritsa ntchito mzere wa zero-phonon LD wokhala ndi 969 nm loko wavelength, zomwe zimachepetsa kuwonongeka kwa quantum mpaka 5.8%. Mapangidwe apadera oziziritsa amatha kuziziritsa bwino kristalo wawafer ndikuwonetsetsa kukhazikika kwa chiwombankhanga chosinthika. Mphuno yowonjezereka yowonjezereka imakhala ndi maselo a Pockels (PC), Thin Film Polarizers (TFP), Mapepala a Quarter-Wave (QWP) ndi resonator yokhazikika kwambiri. Ma Isolators amagwiritsidwa ntchito kuteteza kuwala kokulirapo kuti zisawononge gwero la mbewu. Mapangidwe odzipatula omwe ali ndi TFP1, Rotator ndi Half-Wave Plates (HWP) amagwiritsidwa ntchito kupatula mbewu zolowetsa ndi ma pulses okulitsa. Kugunda kwa mbewu kumalowa muchipinda chokulitsanso kudzera pa TFP2. Makhiristo a Barium metaborate (BBO), PC, ndi QWP amaphatikizana kuti apange chosinthira chowoneka bwino chomwe chimagwiritsa ntchito magetsi okwera nthawi ndi nthawi pa PC kuti azitha kujambula kugunda kwambewu ndikufalitsa mmbuyo ndi mtsogolo m'mphako. Kugunda komwe kumafunidwa kumayenda m'bowo ndipo kumakulitsidwa bwino paulendo wozungulira kufalitsa posintha bwino nthawi yoponderezedwa ya bokosilo.
Chowonjezera chowonjezera chowotcha chimawonetsa magwiridwe antchito abwino ndipo chidzatenga gawo lofunika kwambiri m'magawo opanga zinthu zapamwamba kwambiri monga ultraviolet lithography, gwero la pampu ya attosecond, zamagetsi 3C, ndi magalimoto amphamvu atsopano. Nthawi yomweyo, ukadaulo wa laser wawafer ukuyembekezeka kugwiritsidwa ntchito pazamphamvu kwambirizida za laser, kupereka njira zatsopano zoyesera zopangira ndi kuzindikira bwino za nkhani pa nanoscale space scale ndi femtosecond time sikelo. Ndi cholinga cha kutumikira zofunika zazikulu za dziko, gulu polojekiti adzapitiriza kuganizira luso laser luso, kupitirira kudutsa yokonza njira mkulu-mphamvu makhiristo laser, ndi bwino kusintha kafukufuku palokha ndi luso chitukuko cha zipangizo laser mu minda ya chidziwitso, mphamvu, zipangizo zapamwamba ndi zina zotero.