Ìhè a na-ahụ anya Sub-20 femtosekọndtunable pulsed laser isi iyi
N'oge na-adịbeghị anya, otu ndị nyocha sitere na UK bipụtara nyocha ọhụrụ, na-ekwupụta na ha emebela nke ọma n'ịmepụta ọkụ megawatt sub-20 femtosecond a na-ahụ anya nke ọma.pulsed laser isi iyi. Isi iyi laser pulsed, ultrafasteriri laserSistemu nwere ike iwepụta mkpụrụ osisi nwere ogologo ogologo oge, ogologo oge dị mkpụmkpụ, ike dị elu dị ka 39 nanojoules, yana ike kacha elu karịa 2 megawatts, na-emepe atụmanya ngwa ọhụrụ maka ubi ndị dị ka ultrafast spectroscopy, ihe onyonyo ndu, na nhazi ụlọ ọrụ.
Isi ihe dị na teknụzụ a dabere na nchikota ụzọ abụọ dị mma: “Gain-Managed nononlinear Amplification (GMNA)” na “Resonant Dispersive Wave (RDW) emission”. N'oge gara aga, iji nweta ụdị pulses ultrashshort dị elu na-arụ ọrụ dị elu, a na-achọkarị lasers titanium-sapphire dị oke ọnụ na mgbagwoju anya ma ọ bụ amplifiers ngwa anya parametric. Ngwaọrụ ndị a abụghị naanị ọnụ ọnụ, buru ibu, yana sie ike idowe, mana enwerekwa oke site na ọnụego nkwugharị dị ala na nso nsonye. Ihe ngwọta nke fiber niile mepụtara oge a ọ bụghị naanị na-eme ka usoro nhazi usoro dị mfe ma na-ebelata ọnụ ahịa na mgbagwoju anya. Ọ na-enyere ndị ọgbọ nke sub-20 femtosecond aka kpọmkwem, na-emegharị ruo 400 ruo 700 nanometers na karịa ụda ike dị elu na ugboro ugboro ugboro ugboro nke 4.8 MHz. Ndị otu nyocha ahụ nwetara mmetuta a site na nhazi usoro nhazi nke ọma. Nke mbu, ha jiri oscillator ytterbium fiber oscillator kpochiri nke ọma nke na-echekwa ihe dabere na enyo mgbanaka mgbanaka na-adịghị adị (NALM) dị ka isi mmalite mkpụrụ. Nhazi a ọ bụghị nanị na-eme ka nkwụsi ike nke usoro ahụ dị ogologo oge, ma na-ezerekwa nsogbu mmebi nke anụ ahụ jupụtara na ya. Mgbe preamplification na pulse mkpakọ, a na-ewebata mkpụrụ osisi n'ime ogbo GMNA. GMNA na-eji modulation nke oge onwe yana nkesa asymmetrical ogologo n'ime eriri anya iji nweta mgbasawanye nke ukwuu ma mepụta ultrashort pulses na ihe fọrọ nke nta ka ọ bụrụ nke zuru oke linear chirp, nke na-emesịa abịakọta na sub-40 femtoseconds site na grating ụzọ abụọ. N'oge usoro ọgbọ RDW, ndị nchọpụta jiri aka haziri ma rụpụta ihe mgbochi resonator oghere oghere oghere itoolu. Ụdị eriri anya a nwere oke dị ala na mgbapụta mgbapụta mgbapụta na mpaghara ọkụ a na-ahụ anya, na-eme ka ike gbanwee nke ọma site na mgbapụta ahụ gaa na ebili mmiri gbasasịrị ma na-ezere nnyonye anya nke ụda resonant dị elu kpatara. N'okpuru ezigbo ọnọdụ, mgbasa ozi usu ume mmepụta site na usoro nwere ike iru 39 nanojoules, nke kacha nta usu obosara nwere ike iru 13 femtoseconds, elu ike nwere ike dị ka 2.2 megawatts, na ike ntụgharị arụmọrụ nwere ike ịdị elu dị ka 13%. Ọbụna ihe na-atọ ụtọ karị bụ na site n'ịgbanwe nrụgide gas na eriri eriri, usoro ahụ nwere ike ịgbatị ngwa ngwa na eriri ultraviolet na infrared, na-enweta ngbanwe wideband site na ultraviolet miri emi ruo infrared.
Nchọpụta a abụghị naanị na-ejide ihe dị mkpa na ngalaba ntọala nke photonics, kamakwa na-emepe ọnọdụ ọhụrụ maka mpaghara mmepụta ihe na ngwa ngwa. Dị ka ọmụmaatụ, n'ọhịa dị ka multi-photon microscopy imaging, ultrafast oge edozi spectroscopy, nhazi ihe, ọgwụ ziri ezi, na ultrafast na-abụghị nke optics nnyocha, nke a kọmpat, ịrụ ọrụ nke ọma, na ọnụ ala ọhụrụ ụdị ultrafast ìhè isi iyi ga-enye ndị ọrụ ngwá ọrụ na-enwetụbeghị ụdị ya na mgbanwe. Karịsịa n'ọnọdụ ndị chọrọ ọnụ ọgụgụ nkwughachi dị elu, ike kacha elu na obere mkpirisi mkpirisi, ihe ịrụ ụka adịghị ya na nkà na ụzụ a na-asọmpi ma nwee ikike nkwalite dị ukwuu ma e jiri ya tụnyere titanium-sapphire omenala ma ọ bụ usoro nkwalite ngwa anya parametric.
N'ọdịnihu, otu nnyocha ahụ na-ezube ime ka usoro ahụ dịkwuo elu, dị ka ijikọta ihe owuwu dị ugbu a nke nwere ọtụtụ ihe ndị na-ahụ maka oghere oghere n'ime eriri anya, ma ọ bụ ọbụna na-eji otu Mamyshev oscillator dochie oscillator na amplifier ugbu a, iji nweta miniaturization na ntinye nke usoro ahụ. Tụkwasị na nke ahụ, site n'ịgbanwe ụdị dị iche iche nke mgbochi resonance fibers, na-ewebata Raman na-arụ ọrụ gas na ugboro abụọ modul, a na-atụ anya na a ga-agbasawanye usoro a ka ọ bụrụ nnukwu band, na-enye ihe niile fiber, wideband, ultrafast laser ngwọta maka ọtụtụ ubi dị ka ultraviolet, ìhè a na-ahụ anya na infrared.
Onyonyo 1. Eserese atụmatụ nke nzigharị nke laser pulsed
Oge nzipu: Mee-28-2025