Sub-20 femtosecond yowoneka bwino yowunikira gwero la laser

Sub-20 femtosecond kuwala kowonekatunable pulsed laser source

Posachedwapa, gulu lofufuza kuchokera ku UK lidasindikiza kafukufuku watsopano, kulengeza kuti apanga bwino ma megawatt-level sub-20 femtosecond light tunable.pulsed laser source. Gwero la laser pulsed, ultrafastlaser fibersystem imatha kupanga ma pulses okhala ndi mafunde ang'onoang'ono, nthawi yayitali kwambiri, mphamvu zofikira ma nanojoules 39, komanso mphamvu yayikulu yopitilira ma megawati 2, kutsegulira mwayi watsopano wogwiritsa ntchito magawo monga ultrafast spectroscopy, kulingalira kwachilengedwe, komanso kukonza mafakitale.

Chofunikira kwambiri paukadaulo uwu ndikuphatikiza njira ziwiri zotsogola: "Gain-Managed nonlinear Amplification (GMNA)" ndi "Resonant Dispersive Wave (RDW) emission". M'mbuyomu, kuti mupeze ma pulses apamwamba kwambiri otere, ma lasers okwera mtengo komanso ovuta a titaniyamu-sapphire kapena optical parametric amplifiers nthawi zambiri ankafunikira. Zidazi sizinali zodula, zochulukirapo, komanso zovuta kuzisamalira, komanso zochepetsera kubwereza kocheperako komanso kusinthasintha. Yankho la-fiber lomwe linapangidwa nthawi ino silimangopangitsa kuti kamangidwe kake kakhale kosavuta komanso kumachepetsa kwambiri ndalama komanso zovuta. Imathandizira m'badwo wachindunji wa sub-20 femtosecond, womwe umatha kupitilira 400 mpaka 700 nanometers komanso kupitilira mphamvu zamphamvu kwambiri pakubwereza kubwereza kwa 4.8 MHz. Gulu lochita kafukufuku linapeza izi kudzera mu kamangidwe kamene kanapangidwa ndendende. Choyamba, adagwiritsa ntchito polarization-preserving mode-locked ytterbium fiber oscillator kutengera kalirole wokulirapo wopanda mzere (NALM) ngati gwero la mbewu. Kukonzekera kumeneku sikungotsimikizira kukhazikika kwa nthawi yaitali kwa dongosololi, komanso kumapewa vuto la kuwonongeka kwa thupi lodzaza thupi. Pambuyo pa preamplification ndi kuponderezedwa kwa pulse, ma pulse ambewu amalowetsedwa mu gawo la GMNA. GMNA imagwiritsa ntchito kudzisintha kwa gawo limodzi ndi kugawa kwautali kwakutali mu ulusi wowoneka bwino kuti ikwaniritse kufalikira kwa mawonekedwe ndikupanga ma ultrashort pulse okhala ndi mizere yomveka bwino, yomwe pamapeto pake imapanikizidwa mpaka ma sub-40 femtoseconds kudzera pamagulu awiri a grating. Pam'badwo wa RDW, ofufuza adagwiritsa ntchito zida zodzipangira okha ndikupanga zida zisanu ndi zinayi zotsutsana ndi resonance hollow-core. Mtundu woterewu wa kuwala umakhala ndi kutayika kochepa kwambiri mu gulu la pulse pulse ndi dera lowala lowoneka bwino, zomwe zimapangitsa mphamvu kuti ikhale yosinthika bwino kuchokera pa mpope kupita ku mafunde omwazika ndikupewa kusokoneza komwe kumachitika chifukwa cha kutayika kwakukulu kwa resonant band. Pansi pa zinthu mulingo woyenera kwambiri, kubalalitsidwa yoweyula zimachitika mphamvu linanena bungwe akhoza kufika 39 nanojoules, wamfupi zimachitika m'lifupi akhoza kufika 13 femtoseconds, nsonga mphamvu akhoza kukhala mkulu monga 2.2 megawati, ndi mphamvu kutembenuka dzuwa kungakhale mkulu monga 13%. Chosangalatsa kwambiri ndi chakuti posintha mphamvu ya gasi ndi magawo a fiber, dongosololi limatha kufalikira mosavuta ku ma ultraviolet ndi ma infrared band, ndikukwaniritsa makulidwe otambalala kuchokera ku ultraviolet yakuzama kupita ku infrared.

Kafukufukuyu samangokhala ndi kufunikira kwakukulu m'gawo lofunika kwambiri la zithunzithunzi, komanso amatsegula zina mwazinthu zamakampani ndi ntchito. Mwachitsanzo, m'magawo monga kujambula kwa ma microscope amitundu yambiri, mawonekedwe osinthika nthawi yayitali, kukonza zinthu, mankhwala olondola, komanso kafukufuku wamakono wamakono, wowoneka bwino, wothandiza, komanso wotsika mtengo wamtundu watsopano wowunikira mwachangu kwambiri udzapatsa ogwiritsa ntchito zida zosaneneka komanso kusinthasintha. Makamaka pazochitika zomwe zimafuna kubwereza mobwerezabwereza, mphamvu yapamwamba komanso ultra-short pulses, teknolojiyi mosakayikira imakhala yopikisana kwambiri ndipo imakhala ndi mwayi wopititsa patsogolo poyerekeza ndi machitidwe achikhalidwe a titaniyamu-safire kapena optical parametric amplification.

M'tsogolomu, gulu lofufuza likukonzekera kupititsa patsogolo dongosololi, monga kuphatikiza zomangamanga zamakono zomwe zili ndi zigawo zingapo za kuwala kwaufulu mu ulusi wa kuwala, kapena ngakhale kugwiritsa ntchito oscillator imodzi ya Mamyshev m'malo mwa oscillator yamakono ndi amplifier kuphatikiza, kuti akwaniritse miniaturization ndi kuphatikiza kwa dongosolo. Kuphatikiza apo, potengera mitundu yosiyanasiyana ya ma anti-resonance fibers, poyambitsa ma Raman gases yogwira ntchito komanso ma module owirikiza kawiri, dongosololi likuyembekezeka kukulitsidwa ku gulu lalikulu, lopereka ma fiber, wideband, ultrafast laser solutions for multiple fields monga ultraviolet, kuwala kowoneka ndi infrared.

Chithunzi 1. Chithunzi chojambula chakukonzekera kwa laser pulsed