Isishwankathelo samandla aphezului-laser ye-semiconductoricandelo lokuqala lophuhliso
Njengoko ukusebenza kakuhle namandla kuqhubeka kuphucuka, ii-laser diodes (umqhubi we-laser diodes) iza kuqhubeka ithatha indawo yetekhnoloji yendabuko, ngaloo ndlela itshintsha indlela ezenziwa ngayo izinto kwaye ivumela uphuhliso lwezinto ezintsha. Ukuqonda uphuculo olubalulekileyo kwiilaser ze-semiconductor ezinamandla aphezulu nako kunqongophele. Ukuguqulwa kwee-electron zibe ziilaser ngee-semiconductors kwabonakaliswa okokuqala ngo-1962, kwaye kuye kwalandela iintlobo ngeentlobo zenkqubela phambili eziye zaqhuba inkqubela phambili enkulu ekuguqulweni kwee-electron zibe ziilaser ezivelisa kakhulu. Ezi nkqubela phambili zixhase usetyenziso olubalulekileyo ukusuka kwindawo yokugcina izinto ukuya kwinethiwekhi ye-optical ukuya kuluhlu olubanzi lwamacandelo emizi-mveliso.
Uphononongo lwale nkqubela phambili kunye nenkqubela phambili yayo eqokelelweyo lubonisa amandla okuba nempembelelo enkulu nebanzi kwiindawo ezininzi zoqoqosho. Enyanisweni, ngokuphuculwa okuqhubekayo kwe-high-power semiconductor lasers, intsimi yayo yokusetyenziswa iya kukhawulezisa ukwanda, kwaye iya kuba nefuthe elikhulu ekukhuleni koqoqosho.
Umfanekiso 1: Uthelekiso lokukhanya kunye nomthetho kaMoore wee-laser ze-semiconductor ezinamandla aphezulu
Iileser ze-solid-state ezipompelwe yi-diode kunyeiileyiza zefayibha
Inkqubela phambili kwi-high-power semiconductor lasers ikhokelele ekuphuhlisweni kwetekhnoloji ye-downstream laser, apho i-semiconductor lasers zihlala zisetyenziselwa ukuvusa (ukupompa) iikristale ezifakwe i-doped (diode-pumped solid-state lasers) okanye ii-doped fibers (fiber lasers).
Nangona iileyiza ze-semiconductor zibonelela ngamandla e-laser asebenzayo, amancinci, kwaye angabizi kakhulu, zikwanazo nemida emibini ephambili: azigcini amandla kwaye ukukhanya kwazo kulinganiselwe. Ngokusisiseko, izicelo ezininzi zifuna iileyiza ezimbini eziluncedo; Enye isetyenziselwa ukuguqula umbane ube yi-laser emission, kwaye enye isetyenziselwa ukuphucula ukukhanya kwaloo emission.
Iileser ze-solid-state ezipompelwe yi-diode.
Ngasekupheleni kweminyaka yoo-1980, ukusetyenziswa kwee-semiconductor lasers ukupompa ii-solid-state lasers kwaqala ukufumana umdla omkhulu kwezorhwebo. Ii-diode-pumped solid-state lasers (DPSSL) zinciphisa kakhulu ubungakanani kunye nobunzima beenkqubo zolawulo lobushushu (ngokuyintloko ii-cycle coolers) kunye nee-gain modules, ezazisebenzisa izibane ze-arc ukupompa iikristale ze-solid-state laser.
Ubude be-laser ye-semiconductor bukhethwa ngokusekelwe kukudibana kweempawu zokufunxwa kwe-spectral kunye ne-gain medium ye-laser ye-solid-state, enokunciphisa kakhulu umthwalo wobushushu xa kuthelekiswa ne-wideband emission spectrum yesibane se-arc. Xa kujongwa ukuthandwa kwee-laser ezifakwe i-neodymium ezikhupha ubude be-1064nm, i-laser ye-semiconductor ye-808nm ibe yimveliso evelisa kakhulu kwimveliso ye-laser ye-semiconductor kangangeminyaka engaphezu kwama-20.
Ukuphuculwa kokusebenza kakuhle kokupompa iidayidi kwesizukulwana sesibini kwenziwe kwaba nokwenzeka kukukhanya okwandisiweyo kweelaser ze-semiconductor ze-multi-mode kunye nokukwazi ukuzinzisa i-small emission linewidths kusetyenziswa i-bulk Bragg gratings (VBGS) phakathi kwiminyaka yoo-2000. Iimpawu zokunciphisa ukukhanya kwe-spectral ezibuthathaka nezincinci ezimalunga ne-880nm zivuse umdla omkhulu kwii-spectrally stable high brightness pump diodes. Ezi lasers ziphezulu zokusebenza zenza kube nokwenzeka ukupompa i-neodymium ngokuthe ngqo kwinqanaba eliphezulu lelaser le-4F3/2, kunciphisa ukungabikho kwe-quantum kwaye ngaloo ndlela kuphuculwe ukukhupha i-fundamental mode kumandla aphezulu aphakathi, ebekuya kuthintelwa ziilensi zobushushu.
Ekuqaleni kweshumi leminyaka lesibini lale nkulungwane, besibona ukwanda kwamandla okukhulu kwiilaser ze-single-transverse mode ze-1064nm, kunye neelaser zazo zokuguqula i-frequency ezisebenza kwiiwavelengths ezibonakalayo kunye ne-ultraviolet. Ngenxa yobomi obude bamandla aphezulu e-Nd: YAG kunye ne-Nd: YVO4, ezi DPSSL Q-switched operations zibonelela ngamandla aphezulu e-pulse kunye namandla aphezulu, okwenza ukuba zilungele ukucubungula izinto ezingasebenziyo kunye nokusetyenziswa kwe-micromachining echanekileyo kakhulu.
Ixesha lokuthumela: Novemba-06-2023