Sabbin bincike akan lasers semiconductor masu launi biyu

Sabbin bincike akan lasers semiconductor masu launi biyu

Semiconductor disc Laser (SDL Laser), kuma aka sani da a tsaye waje cavity surface-emitting lasers (VECSEL), sun ja hankali sosai a cikin 'yan shekarun nan. Ya haɗu da fa'idodin ribar semiconductor da resonators masu ƙarfi. Ba wai kawai yana kawar da ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun yanayin goyan baya ga laser semiconductor na al'ada ba, har ma yana fasalta ƙirar bandgap mai sassauƙa na semiconductor da halayen haɓaka kayan abu. Ana iya ganin shi a cikin yanayin aikace-aikacen da yawa, kamar ƙananan amokunkuntar-linewidth Laserfitarwa, matsananci-gajere high-maimaitu bugun jini tsara, high-oda jitu tsara, da sodium jagorar fasahar, da dai sauransu Tare da ci gaban fasaha, mafi girma buƙatu da aka sa a gaba domin ta zangon sassauci. Misali, madaidaicin maɓuɓɓugan haske mai tsayi biyu sun nuna ƙimar aikace-aikace mai girma a cikin fagage masu tasowa kamar su lidar hana tsangwama, interferometry na holographic, sadarwar multixing rabo na tsawon tsayi, tsakiyar infrared ko terahertz ƙarni, da tarin mitar gani mai launi iri-iri. Yadda ake samun haske mai haske mai launuka biyu a cikin lasers na faifai na semiconductor da yadda ya kamata don murkushe gasa a tsakanin madaidaicin raƙuman ruwa ya kasance koyaushe wahalar bincike a wannan fagen.

Kwanan nan, mai launi biyusemiconductor LaserTawagar kasar Sin ta ba da shawarar wani sabon tsari na guntu don magance wannan kalubale. Ta hanyar zurfafa bincike na lambobi, sun gano cewa daidaitaccen daidaita adadin da ke da alaƙa da zafin jiki yana samun ingantaccen tacewa kuma ana sa ran tasirin tacewa na microcavity zai cimma sassauƙan sarrafa ribar launi biyu. Dangane da wannan, ƙungiyar ta yi nasarar tsara guntu mai haske mai girman 960/1000 nm. Wannan Laser yana aiki a cikin mahimmancin yanayin kusa da iyakar rarrabawa, tare da hasken fitarwa wanda ya kai kusan 310 MW/cm²sr.

Riba Layer na faifan semiconductor yana da kauri ƴan micrometers kawai, kuma an samar da ƙananan microcavity na Fabry-Perot tsakanin mahaɗar iska da kuma rarrabawar Bragg reflector na ƙasa. Kula da ƙananan microcavity na semiconductor azaman ginanniyar tacewa na guntu zai daidaita ribar adadin da kyau. A halin yanzu, tasirin tacewa na microcavity da ribar semiconductor suna da ƙimar ɗimbin zafin jiki daban-daban. Haɗe tare da kula da zafin jiki, ana iya samun sauyawa da ka'idojin fitarwa. Dangane da waɗannan halayen, ƙungiyar ta ƙididdigewa da saita ƙimar ƙimar ƙima da kyau a 950nm a zafin jiki na 300K, tare da ƙimar zafin zafin ribar riba yana kusan 0.37 nm/K. Daga baya, ƙungiyar ta tsara madaidaicin madaidaicin guntu ta amfani da hanyar matrix watsawa, tare da tsayin tsayin tsayin kusan 960 nm da 1000 nm bi da bi. Kwaikwayo sun bayyana cewa yawan zafin jiki ya kasance 0.08 nm/K kawai. Ta hanyar amfani da fasahar tara kayan tururin sinadarai na ƙarfe-kwayoyin don haɓaka epitaxial da ci gaba da inganta tsarin haɓaka, an sami nasarar ƙirƙira guntu masu inganci masu inganci. Sakamakon ma'auni na photoluminescence sun yi daidai da sakamakon kwaikwayo. Don rage nauyin zafi da cimma babban watsawa, an ƙara haɓaka tsarin marufi na semiconductor-diamond guntu.

Bayan kammala guntu marufi, tawagar gudanar da wani m kima na Laser aiki. A cikin ci gaba da yanayin aiki, ta hanyar sarrafa ikon famfo ko zafin zafin zafi, za a iya daidaita tsawon raƙuman fitar da ruwa tsakanin 960 nm da 1000 nm. Lokacin da famfo ikon ne a cikin wani takamaiman kewayon, da Laser kuma iya cimma dual-wavelengons aiki, tare da zangon tazara har zuwa 39.4 nm. A wannan lokacin, matsakaicin ci gaba da igiyoyin igiyar ruwa ya kai 3.8 W. A halin yanzu, laser yana aiki a cikin mahimmancin yanayin kusa da iyaka, tare da ƙimar ingancin katako M² na kawai 1.1 da haske mai girma kamar kusan 310 MW/cm²sr. Kungiyar ta kuma gudanar da bincike a kan ci gaba da aikin igiyar ruwa naLaser. An sami nasarar ganin jimlar siginar mitar ta hanyar shigar da lu'ulu'u na gani mara kyau na LiB₃O₅ a cikin rami mai resonant, yana mai tabbatar da aiki tare na tsawon zango biyu.

Ta hanyar wannan ƙirar guntu mai hazaƙa, haɗaɗɗun kwayoyin halitta na jimla da samin tacewa da kuma tacewa microcavity an cimma, aza harsashin ƙira don gane tushen Laser launi biyu. Dangane da alamomin aiki, wannan Laser mai launi guda-guntu guda ɗaya yana samun haske mai girma, babban sassauci da daidaitaccen fitowar katako na coaxial. Haskensa yana a matakin jagora na duniya a cikin filin na yanzu na guntu guda biyu-launi biyu-launi. Dangane da aikace-aikacen aikace-aikacen, ana sa ran wannan nasarar za ta haɓaka daidaitattun ganowa da ƙarfin hana tsangwama na lidar launuka masu yawa a cikin mahalli masu sarƙaƙƙiya ta hanyar yin amfani da babban haske da halaye masu launi biyu. A fagen combs na mitar gani, ingantaccen fitowar sa mai tsayi biyu na iya ba da tallafi mai mahimmanci ga aikace-aikace kamar madaidaicin ma'aunin gani da tsinkayen gani mai ƙarfi.