Kuyiniukuguqulwa kwe-laserubuchwepheshe
Ukukhanya uhlobo lwamagagasi kagesi anemvamisa ephezulu. Kunokuhambisana okuhle kakhulu ngakho-ke, njengamagagasi kagesi kagesi angaphambilini (njengemisakazo namathelevishini), kungasetshenziswa njengesithwali sokudlulisa ulwazi. Ulwazi "oluthwalwa" yi-laser (kufaka phakathi ulimi, umbhalo, izithombe, izimpawu, njll.) luthunyelwa kumamukeli ngeziteshi ezithile zokudlulisa (umkhathi, imicu ye-optical, njll.), bese luhlonzwa futhi lubuyiselwe kulwazi lokuqala yi-optical receiver. Inqubo yokulayisha ulwazi kwi-laser ibizwa ngokuthi i-modulation, kanti idivayisi efeza le nqubo ibizwa ngokuthi i-modulator. Phakathi kwazo, i-laser ibizwa ngokuthi i-carrier wave; Ulwazi lwemvamisa ephansi oludlala indima yokulawula lubizwa ngokuthi isignali eguquliwe.
Ukuguqulwa kwe-laser kungahlukaniswa ngokuguqulwa kwangaphakathi kanye nokuguqulwa kwangaphandle.
Ukuguqulwa kwangaphakathi: Kubhekisela ekulayishweni kwezimpawu eziguquliwe ngesikhathi senqubo yokuguquguquka kwe-laser, okungukuthi, ukusebenzisa izimpawu eziguquliwe ukushintsha amapharamitha okuguquguquka kwe-laser, ngaleyo ndlela kushintsha izici zokukhishwa kwe-laser ukuze kufezwe ukuguqulwa. Izindlela zokuguqulwa kwangaphakathi zifaka: 1. Ukulawula ngokuqondile ukunikezwa kwamandla ephampu ye-laser ukuze kufezwe ukuqina kwe-laser yokukhipha eguquliwe. Amandla nokuba khona kokukhishwa konke kulawulwa ukunikezwa kwamandla. Uma isignali ezodluliselwa isetshenziselwa ukulawula ukunikezwa kwamandla e-laser, okwenza izinguquko zamanje nge-laser elawulwa yisignali, khona-ke i-laser ekhishwayo izolawulwa yisignali. 2. Izinto zokuguqulwa zifakwa ngaphakathi kwe-resonant cavity, futhi izakhiwo zomzimba zezinto zokuguqulwa zilawulwa amasignali ukuze zishintshe, ngaleyo ndlela kushintsha amapharamitha e-resonant cavity futhi kushintsha izici zokukhishwa kwe-laser ukuze kufezwe ukuguqulwa. Inzuzo yokuguqulwa kwangaphakathi ukusebenza kahle kwayo okuphezulu kokuguquguquka. Inkinga ukuthi njengoba i-modulator ifakwa ngaphakathi kwe-cavity, ilingana nokwandisa ukulahlekelwa ngaphakathi kwe-cavity, ukunciphisa amandla okukhipha, kanye ne-bandwidth ye-modulator inqunyelwe yi-passband ye-cavity ye-resonant.
Ukuguqulwa kwangaphandle: Kubhekisela ekubekweni kwe-modulator endleleni yokukhanya engaphandle kwe-laser ngemva kokuba i-laser yakheke, futhi izici zomzimba ze-modulator zishintshwa yisignali yokuguqulwa. Lapho i-laser idlula ku-modulator, ipharamitha ethile yegagasi lokukhanya izoguqulwa. Inzuzo yokuguqulwa kwangaphandle ukuthi ayithinti amandla okukhipha e-laser futhi i-bandwidth yejeneretha ayinqunyelwe yi-passband ye-resonant cavity. Inkinga ukusebenza kahle kokuguqulwa okuphansi.
Ukuguqulwa kwe-laser kungahlukaniswa ngokuguqulwa kwe-amplitude, ukuguqulwa kwemvamisa, ukuguqulwa kwesigaba kanye nokuguqulwa kwamandla, njll. ngokuya ngohlobo lwayo lokuguqulwa. Ama-modulators avamile ahambisanayo afaka phakathiama-modulators esigaba, ama-modulator okuqina, njll. Ngaphandle kokuguqulwa kwe-electro-optic intensity okukhulunywa ngakho kanye nokuguqulwa kwe-electro-optic phase, kunezinhlobo eziningi ze-ama-modulators e-laser, njengokuphambeneama-modulators e-electro-optic, ama-modulators e-electro-optic traveling wave, ama-modulators e-Kerr electro-optic, ama-modulators e-acousto-optic, ama-modulators e-magneto-optic, ama-modulators okuphazamisa kanye nama-modulators okukhanya kwendawo, njll.
Isikhathi sokuthunyelwe: Meyi-13-2025