Yintoni iukuguquguquka kwelezaubuchwepheshe
Ukukhanya luhlobo lwamaza e-electromagnetic ane-frequency ephezulu. Kuhambelana kakuhle kwaye ke, njengamaza e-electromagnetic angaphambili (afana neerediyo kunye nomabonwakude), angasetyenziswa njengomthwali wokudlulisa ulwazi. Ulwazi "oluthwalwa" yi-laser (kuquka ulwimi, umbhalo, imifanekiso, iimpawu, njl.njl.) luthunyelwa kwi-receiver ngeendlela ezithile zokudlulisela (umoya, ii-optical fibers, njl.njl.), luze luchongwe kwaye lubuyiselwe kulwazi lokuqala yi-optical receiver. Inkqubo yokulayisha ulwazi kwi-laser ibizwa ngokuba yi-modulation, kwaye isixhobo esiphumeza le nkqubo sibizwa ngokuba yi-modulator. Phakathi kwazo, i-laser ibizwa ngokuba yi-carrier wave; Ulwazi oluphantsi oludlala indima yokulawula lubizwa ngokuba yi-modulated signal.
Ukuguqulwa kwelaser kunokwahlulwahlulwa kube kukuguqulwa kwangaphakathi kunye nokuguqulwa kwangaphandle.
Ukuguqulwa kwangaphakathi: Kubhekisa ekulayishweni kwemiqondiso eguquliweyo ngexesha lenkqubo yokujika kwelaser, oko kukuthi, ukusebenzisa imiqondiso eguquliweyo ukutshintsha iiparameter zokujika kwelaser, ngaloo ndlela kutshintsha iimpawu zokuphuma kwelaser ukuze kufezekiswe ukuguquguquka. Iindlela zokuguqulwa kwangaphakathi ziquka: 1. Ukulawula ngokuthe ngqo umbane wepompo yelaser ukuze kufezekiswe ubunzulu belaser eguquliweyo. Amandla kunye nobukho bemveliso zonke zilawulwa lunikezelo lwamandla. Ukuba isignali eza kudluliselwa isetyenziselwa ukulawula unikezelo lwamandla lwelaser, okwenza utshintsho lwangoku ngelaser elawulwa luphawu, ilaser ekhutshiweyo nayo iya kulawulwa luphawu. 2. Izinto zokuguqulwa zifakwa ngaphakathi kwi-resonant cavity, kwaye iipropati zomzimba zezinto zokuguqulwa zilawulwa zizibonakaliso zokutshintsha, ngaloo ndlela kutshintsha iiparameter ze-resonant cavity kwaye kutshintsha iimpawu zokuphuma kwelaser ukuze kufezekiswe ukuguquguquka. Inzuzo yokuguqulwa kwangaphakathi kukusebenza kwayo okuphezulu kokuguquguquka. Ingxaki kukuba ekubeni i-modulator ibekwe ngaphakathi kwi-cavity, ilingana nokwandisa ilahleko ngaphakathi kwi-cavity, ukunciphisa amandla okukhupha, kwaye i-bandwidth ye-modulator inqunyelwe yi-passband ye-resonant cavity.
Ukuguqulwa kwangaphandle: Kubhekisa ekubekweni kwe-modulator kwindlela yokukhanya engaphandle kwe-laser emva kokuba i-laser yenziwe, kwaye iimpawu zomzimba ze-modulator zitshintshwa yisignali yokuguqulwa. Xa i-laser idlula kwi-modulator, iparameter ethile ye-light wave iya kuguqulwa. Inzuzo yokuguqulwa kwangaphandle kukuba ayichaphazeli amandla okukhupha kwe-laser kwaye i-bandwidth yejenereyitha ayithintelwa yi-passband ye-resonant cavity. Ingxaki kukuba ukusebenza kakuhle kwe-modulation kuphantsi.
Ukuguqulwa kwelaser kunokwahlulwahlulwa ngokwe-amplitude modulation, i-frequency modulation, i-phase modulation kunye ne-intensity modulation, njl. ngokwemo yayo yokuguqulwa. Ii-modulators ezifanayo ziqukaiimodulators zesigaba, iimodulators zokuqina, njl. Ngaphandle kokuguqulwa kwe-electro-optic intensity kunye ne-electro-optic phase modulation ekhankanyiweyo apha ngasentla, kukho iintlobo ezininzi zeiimodulators zelaser, njenge-transverseiimodulators ze-electro-optic, ii-electro-optic traveling wave modulators, ii-Kerr electro-optic modulators, ii-acousto-optic modulators, ii-magneto-optic modulators, ii-interference modulators kunye nee-spatial light modulators, njl.
Ixesha leposi: Meyi-13-2025