Ka tsoelo-pele e potlakileng ea theknoloji ea optoelectronic, li-lasers tsa semiconductor li se li sebelisoa haholo mafapheng a fapaneng a kang mehala ea puisano, meriana, ts'ebetso ea indasteri, le LiDAR, ka lebaka la ts'ebetso ea tsona e phahameng, boholo bo kopanetsoeng, le ho feto-fetoha ha molumo habonolo. Motheong oa theknoloji ena ho na le mokhoa oa ho fumana chelete, o bapalang karolo ea bohlokoa haholo. E sebetsa joalo ka“mohloli oa matla”e nolofalletsang tlhahiso e tsosolositsoeng le tlhahiso ea laser, e khethollang laser's tshebetso, wavelength, le bokhoni ba ts'ebeliso.
1. Phaello e Bohareng ke Eng?
Joalo ka ha lebitso le bontša, mokhoa oa ho fumana chelete ke sesebelisoa se fanang ka amplification ea optical. Ha e thabisoa ke mehloli ea matla a kantle (joalo ka ente ea motlakase kapa pompa ea mahlo), e holisa leseli la ketsahalo ka mochini oa tlhahiso e hlasimollang, e lebisang ho tlhahiso ea laser.
Ho li-lasers tsa semiconductor, sebaka sa ho fumana chelete hangata se entsoe ka sebaka se sebetsang sebakeng sa PN, seo sebopeho sa sona, sebopeho le mekhoa ea doping e amang ka kotloloho likarolo tsa bohlokoa joalo ka threshold current, wavelength emission, performance, le litšoaneleho tsa mocheso.
2. Lisebelisoa tse Tloaelehileng tsa ho Rua ka Lasers ea Semiconductor
Li-semiconductors tsa III-V ke tsona tse sebelisoang haholo ho fumana thepa. Mehlala e tloaelehileng e kenyelletsa:
①GaAs (Gallium Arsenide)
E loketse li-lasers tse tsoang ho 850-980 nm, e sebelisoang haholo lipuisanong tsa optical le khatiso ea laser.
②InP (Indium Phosphide)
E sebedisetsoa ho tsoa lihlopheng tsa 1.3 µm le 1.55 µm, ea bohlokoa bakeng sa likhokahano tsa fiber-optic.
③InGaAsP / AlGaAs / InGaN
Liqapi tsa bona li ka hlophisoa ho fihlela bolelele bo fapaneng, ho theha motheo oa meralo ea laser ea tunable-wavelength.
Lisebelisoa tsena hangata li na le meaho e otlolohileng ea li-bandgap, e li etsang hore li sebetse hantle haholo ho kopanngoeng le lesoba la elektronike ka tlhahiso ea photon, e loketseng ho sebelisoa molemong oa ho fumana laser ea semiconductor.
3. Evolution of Get Structures
Ha mahlale a mahlale a ntse a hatela pele, meaho ea ho fumana li-lasers tsa semiconductor e fetohile ho tloha ho li-homojunctions tsa pele ho ea ho li-heterojunctions, 'me ho ea pele ho tlhophiso e tsoetseng pele ea quantum le matheba a quantum.
①Heterojunction Gain Medium
Ka ho kopanya lisebelisoa tsa semiconductor le li-bandgap tse fapaneng, bajari le li-photon li ka koalloa hantle libakeng tse khethiloeng, ho ntlafatsa katleho le ho fokotsa moeli oa hona joale.
②Quantum Well Structures
Ka ho fokotsa botenya ba sebaka se sebetsang ho ea sekaleng sa nanometer, li-electrone li koaletsoe ka litekanyo tse peli, e leng ho eketsang haholo katleho ea ho kopanya mahlaseli. Sena se fella ka li-laser tse nang le maqhubu a tlase a moeli le botsitso bo betere ba mocheso.
③Mehaho ea Quantum Dot
Ka ho sebelisa mekhoa ea ho ipokella, li-nanostructures tsa zero-dimensional li thehoa, li fana ka kabo ea matla a matla. Meaho ena e fana ka litšoaneleho tse ntlafalitsoeng tsa phaello le botsitso ba maqhubu, e ba etsa sebaka sa lipatlisiso bakeng sa li-lasers tsa semiconductor tse sebetsang hantle tsa moloko o latelang.
4. Ke Eng Seo The Gain Medium e se Etsang?
①Emission Wavelength
The bandgap ea thepa e etsa qeto ea laser's bolelele ba maqhubu. Ka mohlala, InGaAs e loketse lisebelisoa tsa laser tse haufi le infrared, ha InGaN e sebelisoa bakeng sa lasers e putsoa kapa ea violet.
②Bokhoni le Matla
Litefiso tsa ho tsamaisa thepa le li-non-radiative recombination li ama katleho ea phetoho ea optical-to-electric.
③Ts'ebetso ea Mocheso
Lisebelisoa tse fapaneng li arabela liphetohong tsa mocheso ka litsela tse sa tšoaneng, tse susumetsang ho tšepahala ha laser libakeng tsa indasteri le tsa sesole.
④Karabelo ea Modulation
The gain medium e susumetsa laser's lebelo la ho arabela, le leng la bohlokoa lits'ebetsong tsa puisano tse potlakileng.
5. Qetello
Ka sebopeho se rarahaneng sa li-lasers tsa semiconductor, mokhoa oa ho fumana chelete ke "pelo" ea eona.-ha e ikarabelle feela bakeng sa ho hlahisa laser empa hape le ho susumetsa bophelo ba eona, botsitso le maemo a ts'ebeliso. Ho tloha ho khetho ea thepa ho ea ho moralo oa sebopeho, ho tloha ho ts'ebetso ea macroscopic ho isa litsing tse nyane haholo, ts'ebetso e 'ngoe le e 'ngoe ea phaello e tsamaisa theknoloji ea laser ho ea ts'ebetsong e kholoanyane, ts'ebeliso e pharalletseng, le tlhahlobo e tebileng.
Ka tsoelopele e tsoelang pele ho mahlale a thepa le thekenoloji ea nano-fabrication, mokhoa oa bokamoso o lebelletsoe ho tlisa khanya e phahameng, tšireletso e pharalletseng ea wavelength, le tharollo e bohlale ea laser.-ho bula menyetla e mengata bakeng sa mahlale, indasteri le sechaba.
Nako ea poso: Jul-17-2025