Nnyocha kachasị ọhụrụ na laser semiconductor agba abụọ

Nnyocha kachasị ọhụrụ na laser semiconductor agba abụọ

Laser diski Semiconductor (Las SDL), nke a makwaara dị ka lasers elu-emitting cavement (VECSEL) nke dị n'èzí, adọtala ọtụtụ mmasị n'afọ ndị na-adịbeghị anya. Ọ na-ejikọta uru nke semiconductor gain na resonators siri ike. Ọ bụghị naanị na ọ na-ebelata oke mpaghara emission nke nkwado otu ụdị maka lasers semiconductor nkịtị nke ọma, kamakwa ọ nwere imewe bandgap semiconductor na-agbanwe agbanwe na njirimara uru ihe dị elu. Enwere ike ịhụ ya n'ọtụtụ ọnọdụ ngwa, dị ka obere mkpọtụlaser dị warara nke nwere ahịrị dị wararammepụta, mmepụta mkpali ugboro ugboro dị mkpụmkpụ, mmepụta harmonic dị elu, na teknụzụ kpakpando ndu sodium, wdg. Site na ọganihu nke teknụzụ, etinyela ihe achọrọ dị elu maka mgbanwe ogologo oge ya. Dịka ọmụmaatụ, isi iyi ọkụ nwere ike ịgbanwe agbanwe abụọ egosila uru ngwa dị elu na mpaghara ndị na-apụta dịka lidar mgbochi-nnyefe, interferometry holographic, nkwukọrịta multiplexing nkewa ogologo oge, mmepụta infrared ma ọ bụ terahertz, na combs ugboro ugboro anya agba dị iche iche. Otu esi enweta mmịpụta agba abụọ dị elu na lasers diski semiconductor ma gbochie asọmpi uru n'etiti ọtụtụ ogologo oge abụrụla ihe isi ike nyocha na ngalaba a.

N'oge na-adịbeghị anya, agba abụọ nwere agba abụọlaser semiconductorNdị otu na China atụpụtala atụmatụ imepụta chip ọhụrụ iji dozie nsogbu a. Site na nyocha ọnụọgụgụ miri emi, ha chọpụtara na a na-atụ anya na nhazi kpọmkwem nke nzacha quantum well gain filter na semiconductor microcavity filter ga-enweta njikwa mgbanwe nke uru agba abụọ. Dabere na nke a, ndị otu ahụ mepụtara chip 960/1000 nm nke ọma. Laser a na-arụ ọrụ na ọnọdụ ntọala dị nso na oke diffraction, yana ìhè mmepụta dị elu dị ka 310 MW/cm²sr.

Oke oyi akwa nke diski semiconductor dị naanị obere mikromita ole na ole, a na-emepụtakwa obere mikromita Fabry-Perot n'etiti ihe na-eme ka semiconductor-ikuku dị na ihe na-eme ka Bragg reflector dị n'okpuru. Ịgwọ obere mikromita semiconductor dị ka ihe nzacha spectral nke chip ahụ ga-agbanwe uru nke olulu quantum. Ka ọ dị ugbu a, mmetụta nzacha microcavity na uru semiconductor nwere ọnụego mgbanwe okpomọkụ dị iche iche. Ejikọtara ya na njikwa okpomọkụ, enwere ike nweta mgbanwe na nhazi nke ogologo ebili mmiri mmepụta. Dabere na njirimara ndị a, ndị otu ahụ gbakọrọ ma tọọ elu uru nke olulu quantum na 950 nm na okpomọkụ 300 K, yana ọnụego mgbanwe okpomọkụ nke ogologo ebili mmiri uru dị ihe dị ka 0.37 nm/K. Mgbe nke ahụ gasịrị, ndị otu ahụ chepụtara ihe mgbochi ogologo oge nke chip site na iji usoro matrix nnyefe, yana ogologo ebili mmiri kachasị elu nke ihe dị ka 960 nm na 1000 nm n'otu n'otu. Ihe ngosi gosiri na ọnụego mgbanwe okpomọkụ bụ naanị 0.08 nm/K. Site n'iji teknụzụ nchekwa anwụrụ ọkụ kemịkalụ metal-organic maka uto epitaxial na ime ka usoro uto ahụ ka mma mgbe niile, e mepụtara ibe uru dị elu nke ọma. Nsonaazụ nha nke photoluminescence kwekọrọ kpamkpam na nsonaazụ ihe atụ ahụ. Iji belata ibu okpomọkụ ma nweta nnyefe ike dị elu, a mepụtala usoro nkwakọ ngwaahịa semiconductor-diamond chip.

Mgbe ha mechara ngwugwu chip ahụ, ndị otu ahụ mere nyocha zuru oke nke arụmọrụ laser ha. N'ụdị ọrụ na-aga n'ihu, site n'ịchịkwa ike mgbapụta ma ọ bụ okpomọkụ sink okpomọkụ, enwere ike ịgbanwe ogologo ikuku n'etiti 960 nm na 1000 nm. Mgbe ike mgbapụta ahụ dị n'ime oke kpọmkwem, laser ahụ nwekwara ike ịrụ ọrụ ogologo ebili mmiri abụọ, yana oge ebili mmiri ruru 39.4 nm. N'oge a, ike ebili mmiri kachasị na-aga n'ihu na-eru 3.8 W. Ka ọ dị ugbu a, laser ahụ na-arụ ọrụ na ọnọdụ dị mkpa nso oke diffraction, yana ihe dị mma nke ọkụ M² nke naanị 1.1 na ìhè dị elu dị ka 310 MW/cm²sr. Ndị otu ahụ mekwara nchọpụta na arụmọrụ ebili mmiri dị ka nke na-aga n'ihu nkelaserA hụrụ mgbaama ugboro ole a na-agbakọta nke ọma site n'itinye kristal anya LiB₃O₅ na-abụghị nke ahịrị n'ime oghere resonant, na-akwado njikọta nke ogologo ebili mmiri abụọ ahụ.

Site na imewe chip a dị egwu, e meela ngwakọta organic nke nzacha quantum well gain na microcavity filter, na-etinye ntọala imewe maka mmezu nke isi mmalite laser agba abụọ. N'ihe gbasara ihe ngosi arụmọrụ, laser agba abụọ a nke otu chip na-enweta nnukwu ìhè, mgbanwe dị elu na mmepụta ọkụ coaxial kpọmkwem. Ọ na-enwu n'ọkwa mba ụwa na ngalaba laser semiconductor agba abụọ nke otu chip ugbu a. N'ihe gbasara ojiji bara uru, a na-atụ anya na mmezu a ga-eme ka izi ezi nchọpụta na ikike mgbochi mgbochi nke lidar agba dị iche iche dịkwuo mma na gburugburu ebe dị mgbagwoju anya site na iji nnukwu ìhè na njirimara agba abụọ ya. N'ọhịa nke combs ugboro ugboro optical, mmepụta ya nke ogologo wavelength kwụsiri ike nwere ike inye nkwado dị mkpa maka ngwa dịka nha spectral ziri ezi na mmetụta anya dị elu.