Yiniukuguqulwa kwe-laserubuchwepheshe
Ukukhanya kuwuhlobo lwamagagasi kagesi anefrikhwensi ephezulu. Inokuhambisana okuhle kakhulu futhi ngaleyo ndlela, njengamaza kagesi adlule (njengemisakazo namathelevishini), ingasetshenziswa njengesiphathi sokudlulisa ulwazi. Ulwazi “oluthwalwa” nge-laser (okuhlanganisa ulimi, umbhalo, izithombe, izimpawu, njll.) luthunyelwa kumamukeli ngamashaneli athile okudlulisela (umkhathi, ama-optical fibers, njll.), bese kukhonjwa futhi kubuyiselwe olwazini lwangempela yisamukeli sokubona. Inqubo yokulayisha ulwazi kuyi-laser ibizwa ngokuthi i-modulation, futhi idivayisi eyenza le nqubo ibizwa ngokuthi i-modulator. Phakathi kwabo, i-laser ibizwa ngokuthi i-carrier wave; Ulwazi lwefrikhwensi ephansi edlala indima yokulawula ibizwa ngokuthi isignali eshintshiwe.
I-laser modulation ingahlukaniswa ibe ukuguquguquka kwangaphakathi nokuguquguquka kwangaphandle.
Ukushintshashintsha kwangaphakathi: Kubhekiselwa ekulayishweni kwamasignali ashintshiwe phakathi nenqubo ye-laser oscillation, okungukuthi, ukusebenzisa amasiginali ashintshiwe ukushintsha imingcele ye-oscillation ye-laser, ngaleyo ndlela kuguqule izici zokuphuma kwe-laser ukuze kuzuzwe ukushintshashintsha. Izindlela zokuguquguquka kwangaphakathi zihlanganisa: 1. Ukulawula ngokuqondile ukuphakelwa kwamandla kwephampu ye-laser ukuze kuzuzwe ukushuba kwe-modulated okukhiphayo laser. Amandla kanye nokuba khona kokuphumayo konke kulawulwa ukunikezwa kwamandla. Uma isignali ezodluliswa isetshenziselwa ukulawula ukunikezwa kwamandla nge-laser, okwenza izinguquko zamanje nge-laser elawulwa isignali, khona-ke i-laser ekhishiwe izophinde ilawulwe isignali. 2. Izakhi zokuguquguquka zifakwa ngaphakathi kwe-resonant cavity, futhi izici ezibonakalayo ze-modulation izakhi zilawulwa amasignali ukuze zishintshe, ngaleyo ndlela ziguqule amapharamitha we-resonant cavity kanye nokushintsha izici zokuphuma kwe-laser ukuze kuzuzwe ukuguquguquka. Inzuzo yokuguquguquka kwangaphakathi ukusebenza kahle kwayo kokuguquguquka. I-drawback yukuthi njengoba i-modulator ibekwe ngaphakathi emgodini, ilingana nokwandisa ukulahlekelwa ngaphakathi kwe-cavity, ukunciphisa amandla okukhipha, futhi umkhawulokudonsa we-modulator unqunyelwe i-passband ye-cavity resonant.
Ukushintshashintshashintsha kwangaphandle: Kubhekisela ekubekweni kwemoduli endleleni yokubona ngaphandle kwelaser ngemva kokwakhiwa kwelaser, futhi izici ezibonakalayo zemoduli zishintshwa isignali yokushintshashintsha. Lapho i-laser idlula kumodeli, ipharamitha ethile yegagasi lokukhanya izoshintshwa. Inzuzo yokuguquguquka kwangaphandle ukuthi ayithinti amandla okukhipha we-laser futhi umkhawulokudonsa we-generator awunqunyelwe yi-passband ye-cavity resonant. I-drawback ukusebenza kahle kwe-modulation ephansi.
Ukuguquguquka kwe-laser kungahlukaniswa kube ukuguquguquka kwe-amplitude, ukuguqulwa kwemvamisa, ukuguquguquka kwesigaba kanye nokuguquguquka kokuqina, njll. ngokuya ngemvelo yakho yokuguquguquka. Amamojula ajwayelekile ahambisanayo afakaama-modulators wesigaba, ama-intensity modulators, njll. Ngaphandle kwalokhu okushiwo ngenhla kwe-electro-optic intensity modulation kanye nokushintshashintsha kwesigaba se-electro-optic, Kunezinhlobo eziningiama-modulators we-laser, njengokuphambanaama-modulators e-electro-optic, ama-modulators e-electro-optic traveling wave, Kerr electro-optic modulators, acousto-optic modulators, magneto-optic modulators, interference modulators and spatial light modulators, njll.
Isikhathi sokuthumela: May-13-2025