Ubushakashatsi buheruka kuri lasers za semiconductor zifite amabara abiri
Imashini zikoresha disiki ya semiconductor (SDL lasers), zizwi kandi nka vertical external cavity surface-emitting lasers (VECSEL), zakunzwe cyane mu myaka ya vuba aha. Zihuza ibyiza byo gukura kwa semiconductor na solid-state resonators. Ntabwo zigabanya gusa neza uburebure bw'agace k'imyuka ku buryo bwo gushyigikira laser zisanzwe za semiconductor, ahubwo zinafite imiterere y'icyuho cya semiconductor hamwe n'imiterere yo gukura kwa material ku rugero rwo hejuru. Zishobora kugaragara mu buryo butandukanye bwo gukoresha, nko mu rusaku ruke.laser ifite ubugari bw'umurongo mutoumusaruro, gukora pulse ngufi cyane kandi isubiramo neza, gukora harmonic yo mu rwego rwo hejuru, n'ikoranabuhanga rya sodium guide star, nibindi. Uko ikoranabuhanga ryateye imbere, hashyizweho ibisabwa byinshi kugira ngo uburebure bw'urumuri rwayo burusheho kuba bwiza. Urugero, amasoko y'urumuri ahuza uburebure bw'urumuri yagaragaye ko afite akamaro kanini cyane mu nzego zigitangira gukora nka anti-interference lidar, holographic interferometry, wavelength division multiplexing communication, mid-infrared cyangwa terahertz generation, na multi-color optical frequency combs. Uburyo bwo kugera ku bushyuhe bwinshi bwo gutanga amabara abiri muri semiconductor disc lasers no gukumira neza gupiganwa hagati y'uburebure bw'urumuri byagiye biba ingorabahizi mu bushakashatsi muri uru rwego.
Vuba aha, hagaragaye amabara abirilaser ya semiconductorItsinda ry’Abashinwa ryatanze igitekerezo cy’igishushanyo mbonera gishya cya chip kugira ngo gikemure iki kibazo. Binyuze mu bushakashatsi bwimbitse ku mibare, basanze kugenzura neza ingaruka z’ubushyuhe bwa quantum well gain filtering hamwe n’ingaruka za semiconductor microcavity filtering byitezweho kugira ngo bigerweho mu kugenzura neza kwiyongera kw’amabara abiri. Hashingiwe kuri ibi, itsinda ryakoze neza chip ifite ubwiza bwa 960/1000 nm. Iyi laser ikora mu buryo bw’ibanze hafi y’umupaka wa diffraction, hamwe n’urumuri rutanga umusaruro rugera kuri 310 MW/cm²sr.
Urusobe rw'ingufu rwa disiki ya semiconductor rufite ubugari bwa mikorometero nke gusa, kandi hakorwa microcavity ya Fabry-Perot hagati y'aho semiconductor-air ihurira n'agace ko hasi ka Bragg gatanga urumuri. Gufata microcavity ya semiconductor nk'akayunguruzo k'imashini karimo spectral bizahindura inyungu y'ingufu ya quantum. Hagati aho, ingaruka zo kuyungurura microcavity n'inyungu ya semiconductor bifite igipimo gitandukanye cyo kunyura mu bushyuhe. Hamwe no kugenzura ubushyuhe, guhindura no kugenzura uburebure bw'umuvuduko w'amazi bishobora kugerwaho. Hashingiwe kuri ibi biranga, itsinda ryabaruye kandi rishyiraho igipimo cyo kunyura mu ngano y'amazi ya quantum kuri 950 nm ku bushyuhe bwa 300 K, aho igipimo cyo kunyura mu bushyuhe cy'umuvuduko w'umuvuduko w'amazi cya 0.37 nm/K. Nyuma yaho, itsinda ryakoze ikintu kigabanya ubushyuhe hakoreshejwe uburyo bwa transmission matrix, aho uburebure bw'umuvuduko bwa 960 nm na 1000 nm. Inyigo zagaragaje ko igipimo cyo kunyura mu bushyuhe cyari 0.08 nm/K gusa. Hakoreshejwe ikoranabuhanga ryo gushyira umwuka mu byuma bivangwa n’ibintu ...
Nyuma yo kurangiza gupakira chip, itsinda ryakoze isuzuma ryimbitse ry’imikorere ya laser. Mu buryo bw’imikorere buhoraho, binyuze mu kugenzura imbaraga za pompe cyangwa ubushyuhe bwo gushyushya, uburebure bw’umuraba bushobora guhindurwa mu buryo bworoshye hagati ya 960 nm na 1000 nm. Iyo imbaraga za pompe ziri mu rugero runaka, laser ishobora no kugera ku burebure bw’uburebure bw’umuraba bubiri, hamwe n’intera y’uburebure bw’umuraba igera kuri 39.4 nm. Muri iki gihe, imbaraga ntarengwa z’umuraba uhoraho zigera kuri 3.8 W. Hagati aho, laser ikora mu buryo bw’ibanze hafi y’umupaka w’ikwirakwizwa ry’urumuri, ifite factor y’ubwiza bwa beam M² ya 1.1 gusa n’urumuri ruri hejuru ya 310 MW/cm²sr. Itsinda ryanakoze ubushakashatsi ku mikorere y’umuraba uhoraho walaserIkimenyetso cya frequence y'umuvuduko w'amazi cyagaragaye neza binyuze mu gushyira kristu ya LiB₃O₅ idakoresha umurongo umwe mu gice cy'umuvuduko w'amazi mu gice cy'umuvuduko w'amazi, byemeza guhuza uburebure bw'umuvuduko w'amazi bubiri.
Binyuze muri ubu buryo bw'ubuhanga bwo gushushanya chip, uburyo bwo guhuza imiterere y'ingufu za quantum well gain na microcavity filtering byagezweho, bishyiraho urufatiro rw'igishushanyo mbonera cyo gushyira mu bikorwa amasoko ya laser y'amabara abiri. Ku bijyanye n'ibipimo by'imikorere, iyi laser y'amabara abiri ifite chip imwe igera ku mucyo mwinshi, ubworoherane bwinshi n'umusaruro wa coaxial neza. Umucyo wayo uri ku rwego rwo hejuru ku rwego mpuzamahanga mu bijyanye na lasers za semiconductor zifite chip imwe. Ku bijyanye n'ikoreshwa mu buryo bufatika, iyi ntego yitezweho kongera neza ubushobozi bwo kumenya no gukumira ingaruka za lidar y'amabara menshi mu bidukikije bigoye binyuze mu gukoresha urumuri rwayo rwinshi n'imiterere yayo y'amabara abiri. Mu rwego rwo gupima frequency ya optical, umusaruro wayo uhamye w'uburebure bw'amabara abiri ushobora gutanga inkunga y'ingenzi ku bikorwa nko gupima neza spectral no kumenya neza optical.
Igihe cyo kohereza: 23 Nzeri 2025