Ke englaser modulationthekenoloji
Leseli ke mofuta oa leqhubu la motlakase le nang le maqhubu a holimo. E na le momahano e babatsehang, ka hona, joalo ka maqhubu a motlakase a fetileng (joaloka liea-le-moea le lithelevishene), e ka sebelisoa e le mochine oa ho fetisa boitsebiso. Boitsebiso bo "jaroang" ke laser (ho kenyeletsoa puo, mongolo, litšoantšo, matšoao, joalo-joalo) bo romelloa ho moamoheli ka litsela tse itseng tsa phetisetso (sepakapaka, optical fibers, joalo-joalo), ebe li tsejoa le ho khutlisetsoa boitsebisong ba pele ke mochine oa optical. Mokhoa oa ho kenya boitsebiso holim'a laser o bitsoa modulation, 'me sesebelisoa se finyellang sena se bitsoa modulator. Har'a bona, laser e bitsoa "carrier wave; Tlhahisoleseding e tlaase-frequency e phethang karolo ea ho laola e bitsoa modulated signal.
Laser modulation e ka aroloa ka ho feto-fetoha ha ka hare le ho feto-fetoha ha ka ntle.
Ho feto-fetoha ha ka hare: E bua ka ho jara matšoao a fetotsoeng nakong ea ts'ebetso ea laser oscillation, ke hore, ho sebelisa matshwao a fetotsoeng ho fetola liparamente tsa oscillation tsa laser, ka hona ho fetola litšobotsi tsa tlhahiso ea laser ho fihlela modulation. Mekhoa ea ho feto-fetoha ha ka hare e kenyelletsa: 1. Ho laola ka ho toba phepelo ea matla a pompo ea laser ho finyella matla a laser e hlahisoang ke modulated. Matla le boteng ba lihlahisoa kaofela li laoloa ke matla a matla. Haeba lets'oao le lokelang ho fetisoa le sebelisetsoa ho laola matla a matla a laser, ho etsa liphetoho tsa morao-rao ka laser e laoloang ke letšoao, joale laser e ntšitsoeng e tla boela e laoloe ke letšoao. 2. Lintho tsa ho feto-fetoha li behiloe ka har'a sekoti sa resonant, 'me thepa ea' mele ea likarolo tsa modulation e laoloa ke matšoao a ho fetoha, ka hona ho fetola mekhahlelo ea "resonant cavity" le ho fetola litšobotsi tsa laser ho finyella modulation. Molemo oa ho feto-fetoha ha ka hare ke bokhoni ba eona bo phahameng ba ho feto-fetoha ha maemo. Bothata ke hore kaha modulator e behiloe ka har'a sekoti, e lekana le ho eketsa tahlehelo ka hare ho sekoti, ho fokotsa matla a tlhahiso, 'me bandwidth ea modulator e lekanyelitsoe ke passband ea cavity resonant.
Modulator ea kantle: E bua ka ho beoa ha modulator tseleng ea optical ka ntle ho laser ka mor'a hore laser e thehoe, 'me litšobotsi tsa' mele tsa modulator li fetoloa ke lets'oao la modulation. Ha laser e feta modulator, paramente e itseng ea leqhubu la leseli e tla fetoloa. Molemo oa ho feto-fetoha ha molumo oa ka ntle ke hore ha o ame matla a phallo ea laser le bandwidth ea jenereithara ha e felle feela ke passband ea cavity resonant. Drawback ke ts'ebetso e tlase ea modulation.
Laser modulation e ka aroloa ka amplitude modulation, frequency modulation, phase modulation le intensity modulation, joalo-joalo ho ea ka sebopeho sa eona sa modulation. Li-modulator tse tšoanang tse tloaelehileng li kenyelletsali-modulator tsa mekhahlelo, matla a modulators, joalo-joalo Ntle le "electro-optic intensity modulation" e boletsoeng ka holimo le electro-optic phase modulation, Ho na le mefuta e mengata eali-modulators tsa laser, joalo ka transverseli-modulators tsa electro-optic, li-modulator tsa maqhubu a motlakase a motlakase, li-modulator tsa Kerr electro-optic, li-acousto-optic modulators, magneto-optic modulators, li-modulator tse sitisang le li-modulator tsa sebaka sa khanya, joalo-joalo.
Nako ea poso: May-13-2025