Umgomo wokusebenza weI-semiconductor laser
Okokuqala, izidingo zepharamitha ze-lasemiconductor lasers ziyethulwa, ikakhulukazi ezihlanganisa izici ezilandelayo:
1. Ukusebenza kwe-Photoelectric: okuhlanganisa isilinganiso sokuqothulwa, ububanzi bomugqa oguqukayo namanye amapharamitha, le mingcele ithinta ngokuqondile ukusebenza kwama-lasemiconductor lasers ezinhlelweni zokuxhumana.
2. Amapharamitha wesakhiwo: njengosayizi okhanyayo nokuhlelwa, incazelo yokuphela kokukhipha, usayizi wokufaka nosayizi wohlaka.
3. Ubude be-wavelength: Ububanzi be-wavelength be-laser ye-semiconductor ngu-650~1650nm, futhi ukunemba kuphezulu.
4. I-Threshold current (Ith) kanye ne-operating current (lop) : Le mingcele inquma izimo zokuqalisa kanye nesimo sokusebenza se-laser ye-semiconductor.
5. Amandla ne-voltage: Ngokulinganisa amandla, i-voltage kanye namandla e-laser ye-semiconductor emsebenzini, amajika e-PV, PI kanye ne-IV angadonswa ukuze aqonde izici zawo zokusebenza.
Isimiso sokusebenza
1. Izimo zenzuzo: Ukusabalalisa okuguquliwe kwezithwali zokushaja endaweni ye-lasing (isifunda esisebenzayo) kuyasungulwa. Ku-semiconductor, amandla ama-electron amelwe uchungechunge lwamazinga wamandla acishe abe aqhubekayo. Ngakho-ke, inani lama-electron ngaphansi kwebhendi yokuqhuba esimweni samandla aphezulu kufanele libe likhulu kakhulu kunenombolo yezimbobo phezulu kwebhande le-valence esimweni samandla aphansi phakathi kwezifunda ezimbili zamabhendi wamandla ukuze kuzuzwe ukuguqulwa inombolo yezinhlayiyana. Lokhu kufinyelelwa ngokusebenzisa ukuchema okuhle ku-homojunction noma i-heterojunction kanye nokujova abathwali abadingekayo kungqimba esebenzayo ukuze kujabulise ama-electron asuka ebhendini ephansi ye-valence yamandla kuya ebhendini yokuqhuba amandla ephakeme. Lapho inani elikhulu lama-electron endaweni yezinhlayiya ezihlanekezelwe lihlangana futhi nezimbobo, ukukhishwa okushukunyiswayo kwenzeka.
2. Ukuze empeleni kutholakale imisebe evuselelwe ehambisanayo, imisebe evuselelwe kufanele ibuyiselwe izikhathi eziningana ku-resonator optical ukuze yenze i-laser oscillation, i-resonator ye-laser yakhiwa indawo engokwemvelo yokuqhekeka kwekristalu ye-semiconductor njengesibuko, ngokuvamile. ifakwe ekugcineni kokukhanya ngefilimu ye-dielectric ye-multilayer ekhombisa phezulu, futhi indawo ebushelelezi ihlanganiswe nefilimu ekhanyayo encishisiwe. Ku-Fp cavity (i-Fabry-Perot cavity) semiconductor laser, i-FP cavity ingakhiwa kalula ngokusebenzisa indiza yemvelo yokuhlukanisa i-perpendicular to the pn junction plane ye-crystal.
(3) Ukuze kwakheke i-oscillation ezinzile, i-laser medium kufanele ikwazi ukuhlinzeka ngenzuzo enkulu ngokwanele ukunxephezela ukulahleka kokubona okubangelwa i-resonator kanye nokulahlekelwa okubangelwa ukuphuma kwe-laser kusuka endaweni yomgodi, futhi ikhulise njalo insimu ekhanyayo emgodini. Lokhu kufanele kube nomjovo wamanje oqinile ngokwanele, okungukuthi, kukhona ukuguqulwa kwenombolo yezinhlayiyana ezanele, izinga eliphezulu lokuguqulwa kwenombolo yezinhlayiyana, inzuzo enkulu, okungukuthi, imfuneko kufanele ihlangabezane nesimo esithile samanje somkhawulo. Lapho i-laser ifinyelela embundwini, ukukhanya okunobude beza obuthile kungenziwa kabusha emgodini futhi kukhuliswe, futhi ekugcineni kwakhe i-laser nokuphuma okuqhubekayo.
Imfuneko yokusebenza
1. Umkhawulokudonsa wokuguquguquka kanye nezinga: amalaza e-semiconductor kanye nobuchwepheshe bawo bokuguquguquka bubalulekile ekuxhumaneni okungenantambo okungenantambo, futhi umkhawulokudonsa wokumodulisa kanye nezinga kuthinta ngqo ikhwalithi yokuxhumana. I-laser eshintshiwe yangaphakathi (laser modulated ngqo) ifaneleka emikhakheni ehlukene yokuxhumana nge-fiber optical ngenxa yokudlulisela kwayo ngesivinini esiphezulu kanye nezindleko eziphansi.
2. Izici ze-Spectral kanye nezici zokuguquguquka: I-semiconductor isabalalise ama-lasers wempendulo(I-DFB laser) baye baba umthombo wokukhanya obalulekile ekuxhumaneni kwe-fiber optical kanye nokuxhumana kwe-space optical ngenxa yezici zabo ezinhle kakhulu ze-spectral nezici zokuguquguquka.
3. Izindleko kanye nokukhiqizwa okukhulu: Ama-lasemiconductor lasers adinga ukuba nezinzuzo zezindleko eziphansi kanye nokukhiqiza ngobuningi ukuze ahlangabezane nezidingo zokukhiqiza nezinhlelo zokusebenza ezinkulu.
4. Ukusetshenziswa kwamandla nokuthembeka: Ezimeni zohlelo lokusebenza njengezikhungo zedatha, ama-laser we-semiconductor adinga ukusetshenziswa kwamandla okuphansi nokuthembeka okuphezulu ukuze kuqinisekiswe ukusebenza okuzinzile kwesikhathi eside.
Isikhathi sokuthumela: Sep-19-2024