Ke eng alaser ea bophara ba mola o moqotetsane?
Narrow linewidth laser, Poleloana "bophara ba line" e bolela bophara ba mola oa spectral oalasersebakeng sa maqhubu, seo hangata se lekantsoeng ho latela halofo ea tlhōrō e feletseng ea bophara ba spectrum (FWHM). The linewidth haholo-holo angoa ke mahlaseli a itlelang feela ea liathomo thabo kapa li-ion, lerata la mohato, mochine o sisinyehang oa resonator, jitter mocheso le lintho tse ling tse ka ntle. Ntho e nyenyane ea boleng ba bophara ba mohala, e phahamisa bohloeki ba marang-rang, ke hore, ho molemo ho feta monochromaticity ea laser. Li-Laser tse nang le litšobotsi tse joalo hangata li na le mohato o fokolang haholo kapa lerata la khafetsa le lerata le lenyenyane haholo. Ka nako e ts'oanang, boleng bo fokolang ba bophara ba mohala oa laser, bo matla ba momahano o lumellanang, o bonahatsoang e le bolelele bo bolelele ba momahano.
Ho elelloa le ho sebelisoa ha laser linewidth e moqotetsane
Ho fokotsoa ke phaello ea tlhaho ea bophara ba ntho e sebetsang ea laser, ho batla ho sa khonehe ho lemoha ka ho toba tlhahiso ea laser e moqotetsane ea bophara ka ho itšetleha ka oscillator ea setso ka boeona. E le ho hlokomela ts'ebetso ea laser e moqotetsane, hangata hoa hlokahala ho sebelisa li-filters, grating le lisebelisoa tse ling ho fokotsa kapa ho khetha modulus ea longitudinal ka har'a sekhahla sa phaello, ho eketsa phapang ea letlooa lipakeng tsa mekhoa ea longitudinal, e le hore ho be le oscillation e fokolang kapa e le 'ngoe feela ea longitudinal ho resonator ea laser. Ts'ebetsong ena, hangata hoa hlokahala ho laola tšusumetso ea lerata ho tlhahiso ea laser, le ho fokotsa ho pharalla ha mela ea spectral e bakoang ke ho sisinyeha le liphetoho tsa mocheso oa tikoloho ea kantle; Ka nako e ts'oanang, e ka boela ea kopanngoa le tlhahlobo ea sekhahla sa sekhahla sa lerata kapa maqhubu a lerata ho utloisisa mohloli oa lerata le ho ntlafatsa moralo oa laser, e le ho finyella tlhahiso e tsitsitseng ea laser e moqotetsane.
Ha re shebeng ts'ebetso ea ts'ebetso ea mola o mosesaane oa mekhahlelo e mengata e fapaneng ea lasers.
Li-lasers tsa semiconductor li na le melemo ea boholo bo kopaneng, ts'ebetso e phahameng, bophelo bo bolelele le melemo ea moruo.
Fabry-Perot (FP) optical resonator e sebelisoang moetlonglisebelisoa tsa laser tsa semiconductorka kakaretso oscillates ka mokgwa wa multi-longitudinal, 'me sephetho mola bophara bophara batlang e le bophara, kahoo ho ke ke ho hlokahala hore ho eketsa maikutlo a optical ho fumana tlhahiso ea moqotetsane bophara ba mola.
Distributed feedback (DFB Laser) le Distributed Bragg reflection (DBR) ke li-lasers tse peli tse tloaelehileng tsa ka hare tsa optical semiconductor. Ka lebaka la sekontiri se senyenyane sa grating le khetho e ntle ea wavelength, ho bonolo ho fihlella tlhahiso e tsitsitseng ea maqhubu a moqotetsane a le mong. Phapang e ka sehloohong pakeng tsa mehaho e 'meli ke boemo ba grating: DFB Laser sebopeho hangata aba sebopeho sa nako ea Bragg grating ho pholletsa le resonator,' me resonator ea DBR hangata e entsoe ka sebopeho sa ho bonahatsa grating le sebaka sa phaello se kopantsoeng le sebaka sa ho qetela. Ntle le moo, li-laser tsa DFB li sebelisa li-grating tse kentsoeng tse nang le phapang e tlase ea index ea refractive le ponahalo e tlase. Li-laser tsa DBR li sebelisa li-grating tsa bokaholimo tse nang le phapang e phahameng ea refractive index le ponahalo e phahameng. Mehaho ka bobeli e na le sebaka se seholo sa mahala sa spectral mme e khona ho etsa tokiso ea wavelength ntle le mokhoa oa ho tlola lipakeng tsa nanometer tse 'maloa, moo laser ea DBR e nang le mefuta e mengata ea tokiso ho fetaDFB laser. Ho phaella moo, thekenoloji ea "external cavity optical feedback" , e sebelisang lisebelisoa tsa ka ntle tsa optical ho fana ka maikutlo a leseli le hlahang la semiconductor laser chip le ho khetha maqhubu, e ka boela ea hlokomela ts'ebetso e fokolang ea mohala oa semiconductor laser.
(2) Fiber lasers
Li-laser tsa fiber li na le ts'ebetso e phahameng ea phetolo ea pompo, boleng bo botle ba maballo le ts'ebetso e phahameng ea ho kopanya, e leng lihlooho tsa lipatlisiso tse chesang lebaleng la laser. Boemong ba mehla ea tlhahisoleseling, li-laser tsa fiber li lumellana hantle le litsamaiso tsa hajoale tsa puisano tsa optical fiber 'marakeng. Laser ea fiber e le 'ngoe e nang le melemo ea bophara ba mela e moqotetsane, lerata le tlaase le momahano e ntle e fetohile e' ngoe ea litsela tsa bohlokoa tsa tsoelo-pele ea eona.
Single longitudinal mode opereishene ke motheo oa fiber laser ho finyella e moqotetsane mola-bophara tlhahiso, hangata ho ea ka sebopeho sa resonator ea single frequency fiber laser e ka aroloa ka DFB mofuta, DBR mofuta le lesale mofuta. Har'a bona, molao-motheo o sebetsang oa DFB Laser le DBR single-frequency fiber lasers o tšoana le oa DFB le DBR semiconductor lasers.
Ka 1960, laser ea pele ea ruby ea lefats'e e ne e le laser e tiileng-state, e khetholloang ka matla a phahameng a tlhahiso le tšireletso e pharaletseng ea maqhubu. Sebopeho se ikhethileng sa sebaka sa "solid-state laser" se etsa hore e feto-fetohe haholoanyane moralong oa tlhahiso ea bophara bo moqotetsane. Hajoale, mekhoa ea mantlha e kentsoeng ts'ebetsong e kenyelletsa mokhoa o mokhuts'oane oa cavity, mokhoa o le mong oa ring cavity, intracavity standard standard, torsion pendulum mode cavity method, volume Bragg grating mokhoa le mokhoa oa ente ea peo.
Nako ea poso: Jun-03-2025