Nchọpụta kachasị ọhụrụ na lasers semiconductor nwere agba abụọ

Nchọpụta kachasị ọhụrụ na lasers semiconductor nwere agba abụọ

Laser diski semiconductor (SDL lasers), makwaara dị ka vetikal external cavity surface-emitting lasers (VECSEL), adọtala nlebara anya nke ukwuu n'afọ ndị na-adịbeghị anya. Ọ na-ejikọta uru nke uru semiconductor na resonators steeti siri ike. Ọ bụghị naanị na ọ na-ebelata mmachi mpaghara emission nke nkwado otu ụdị maka lasers semiconductor, kamakwa ọ na-egosipụta atụmatụ bandgap semiconductor na-agbanwe agbanwe yana njirimara uru ihe dị elu. Enwere ike ịhụ ya n'ọtụtụ ọnọdụ ngwa ngwa, dị ka obere mkpọtụlaser-line obosarammepụta, ultra-short high-re repetition pulse generation, elu-order harmonic generation, na sodium ndu star technology, wdg Site na ọganihu nke nkà na ụzụ, elu chọrọ ka etinyere n'ihu ya wavelength mgbanwe. Ọmụmaatụ, isi iyi ọkụ na-agbakọ agba nke nwere ogologo ogologo ogologo egosila uru ngwa dị oke elu na mpaghara na-apụta dị ka mgbochi nnyonye anya lidar, holographic interferometry, nkwurịta okwu nkewa nkewa ogologo ogologo, ọgbọ etiti infrared ma ọ bụ terahertz, yana ọtụtụ agba agba agba. Otu esi enweta ikuku nwere agba abụọ na-egbuke egbuke na lasers diski semiconductor na nke ọma na-egbochi asọmpi uru n'etiti ọtụtụ wavelengths abụwo ihe isi ike nyocha na mpaghara a.

Na nso nso a, a dual-agbasemiconductor laserNdị otu nọ na China atụpụtala atụmatụ mgbawa ọhụrụ iji gboo ihe ịma aka a. Site n'ime nyocha ọnụọgụgụ miri emi, ha chọpụtara na ịhazi kpọmkwem quantum metụtara okpomọkụ na-enweta nzacha nke ọma yana mmetụta nzacha microcavity semiconductor ga-enweta njikwa mgbanwe nke uru agba abụọ. Dabere na nke a, ndị otu ahụ haziri mgbawa 960/1000 nm dị elu nke na-enwu gbaa. Laser a na-arụ ọrụ n'ụdị dị mkpa n'akụkụ oke nkesa, yana nchapụta nsonaazụ ruru ihe dịka 310 MW/cm²sr.

Uru oyi akwa nke diski semiconductor bụ naanị micrometers ole na ole, na a na-emepụta microcavity Fabry-Perot n'etiti ikuku ikuku na nkesa na-ekesa Bragg reflector. Ịgwọ microcavity semiconductor dị ka ihe nzacha nke mgbawa arụnyere n'ime ya ga-agbanwe uru nke quantum nke ọma. Ka ọ dị ugbu a, mmetụta nzacha microcavity na uru semiconductor nwere ọnụego mbelata okpomọkụ dị iche iche. Ejikọtara ya na njikwa okpomọkụ, mgbanwe na nhazi nke ogologo oge mmepụta nwere ike nweta. Dabere na njirimara ndị a, ndị otu ahụ gbakọrọ wee tọọ ọnụ ọgụgụ kasị elu nke quantum nke ọma na 950 nm na okpomọkụ 300 K, yana ọnụego ntụgharị okpomọkụ nke ogologo ogologo uru bụ ihe dịka 0.37 nm/K. Mgbe nke ahụ gasịrị, ndị otu ahụ chepụtara ihe mgbochi ogologo oge nke mgbawa site na iji usoro matrix nnyefe, yana ogologo ebili mmiri kacha elu nke ihe dịka 960 nm na 1000 nm n'otu n'otu. Ihe ngosi gosipụtara na ọ̀tụ̀tụ̀ ịfefe okpomọkụ bụ nanị 0.08 nm/K. Site n'iji teknụzụ ntinye kemịkalụ kemịkalụ nke metal-organic maka uto epitaxial na na-aga n'ihu na-ebuli usoro uto ahụ, akpụpụtala ibe uru dị elu nke ọma. Nsonaazụ nha nke fotoluminescence dabara kpamkpam na nsonaazụ ịme anwansị. Iji belata ibu thermal ma nweta nnyefe ike dị elu, usoro nkwakọ ngwaahịa semiconductor-diamond emelitela n'ihu.

Mgbe emechara ngwugwu mgbawa, ndị otu ahụ mere nyocha zuru oke nke arụmọrụ laser ya. Na ọnọdụ ọrụ na-aga n'ihu, site n'ịchịkwa ike mgbapụta ma ọ bụ okpomọkụ sink okpomọkụ, enwere ike gbanwee ikuku ikuku n'etiti 960 nm na 1000 nm. Mgbe ike mgbapụta dị n'ime ebe a kapịrị ọnụ, laser ahụ nwekwara ike ịrụ ọrụ nke abụọ-wavelength, yana ogologo oge nke ruo 39.4 nm. N'oge a, ike kacha na-aga n'ihu na-erute 3.8 W. Ka ọ dị ugbu a, laser na-arụ ọrụ na ọnọdụ dị mkpa n'akụkụ oke diffraction, na-enwe njiri mara mma M² nke naanị 1.1 yana nchapụta dị elu dịka 310 MW/cm²sr. Ndị otu ahụ mekwara nyocha gbasara arụmọrụ ebili mmiri na-aga n'ihulaser. Ahụrụ mgbama nchikota nke ọma site n'itinye kristal anya na-adịghị anya nke LiB₃O₅ n'ime oghere resonant, na-akwado mmekọrịta nke ogologo wavelength abụọ.

Site n'ichepụta mgbawa a mara mma, ngwakọta organic nke quantum nke ọma nweta nzacha na nzacha microcavity enwetala, na-atọ ntọala ntọala maka ịghọta isi mmalite laser nwere agba abụọ. N'ihe gbasara ndị na-egosi arụmọrụ, laser a nwere agba nwere agba nwere otu mgbawa na-enweta nchapụta dị elu, mgbanwe dị elu na mmepụta coaxial beam kpọmkwem. Nchapụta ya dị na ọkwa mba ụwa n'ọkwa dị ugbu a nke lasers semiconductor nwere otu mgbawa nwere agba abụọ. N'ihe gbasara ngwa bara uru, a na-atụ anya na mmezu a ga-eme ka nchọta nke ọma na ikike mgbochi nnyonye anya nke lidar agba dị iche iche na gburugburu ebe dị mgbagwoju anya site n'ịkwalite nchapụta ya dị elu na njirimara agba abụọ. N'ubi nke combs ngwa anya ugboro abụọ, mmepụta ya kwụsiri ike nwere ike inye nkwado dị mkpa maka ngwa dị ka nleba anya nke ọma na nhụta anya dị elu.