Ukuze kuhlangatyezwane neemfuno zabantu ezikhulayo zolwazi, izinga lokudluliselwa kweenkqubo zonxibelelwano lwefayibha ye-optical liyanda imihla ngemihla. Inethiwekhi yonxibelelwano lwe-optical yexesha elizayo iya kuphuhliswa iye kwinethiwekhi yonxibelelwano lwefayibha ye-optical enesantya esiphezulu kakhulu, amandla amakhulu kakhulu, umgama omde kakhulu, kunye nokusebenza kakuhle kwe-spectrum ephezulu kakhulu. I-transmitter ibalulekile. I-transmitter yesignali ye-optical ekhawulezayo kakhulu yenziwe yi-laser evelisa i-optical carrier, isixhobo sokuvelisa i-signal yombane esiguqulayo, kunye ne-modulator ye-electro-optical ekhawulezayo ephezulu eguqula i-optical carrier. Xa kuthelekiswa nezinye iintlobo zee-modulators zangaphandle, ii-modulators ze-lithium niobate electro-optical zinezibonelelo ze-wide operating frequency, uzinzo oluhle, umlinganiselo wokuphela okuphezulu, ukusebenza okuzinzileyo, izinga eliphezulu lokuguquguquka, i-small chirp, i-coupling elula, iteknoloji yemveliso evuthiweyo, njl. Isetyenziswa kakhulu kwiinkqubo zokudluliselwa kwe-optical ezikhawulezayo kakhulu, amandla amakhulu, kunye nomgama omde.
I-voltage yesiqingatha se-wave yiparameter ebalulekileyo kakhulu yomzimba ye-electro-optic modulator. Imele utshintsho kwi-voltage ye-bias ehambelana nokukhanya okuphumayo kwe-electro-optic modulator ukusuka kwi-minimum ukuya kwi-maximum. Imisela i-electro-optic modulator kakhulu. Indlela yokulinganisa ngokuchanekileyo nangokukhawuleza i-voltage yesiqingatha se-wave ye-electro-optic modulator ibaluleke kakhulu ekwenzeni ngcono ukusebenza kwesixhobo kunye nokuphucula ukusebenza kakuhle kwesixhobo. I-voltage yesiqingatha se-wave ye-electro-optic modulator ibandakanya i-DC (isiqingatha se-wave).
i-voltage kunye ne-radiofrequency) i-half-wave voltage. Umsebenzi wokudlulisa we-electro-optic modulator ngolu hlobo lulandelayo:
Phakathi kwazo kukho amandla okukhanya aphumayo e-electro-optic modulator;
Ngaba amandla okukhanya okufakwayo e-modulator;
Ngaba kukulahlekelwa kokufakwa kwe-electro-optic modulator?
Iindlela ezikhoyo zokulinganisa i-voltage yesiqingatha-samaza ziquka ukuvelisa ixabiso eligqithisileyo kunye neendlela zokuphindaphindeka kwe-frequency, ezinokulinganisa i-voltage yesiqingatha-samaza ngqo (DC) kunye ne-radio frequency (RF) yesiqingatha-samaza se-modulator, ngokwahlukeneyo.
Itheyibhile 1 Uthelekiso lweendlela ezimbini zovavanyo lwe-voltage yesiqingatha-samaza
| Indlela yexabiso eligqithisileyo | Indlela yokuphinda kabini rhoqo | |
| Izixhobo zelebhu | Umbane weLaser Imodyuli yokuqina ephantsi kovavanyo Umbane we-DC ohlengahlengiswayo ±15V Imitha yamandla e-Optical | Umthombo wokukhanya kwelaser Imodyuli yokuqina ephantsi kovavanyo Umbane weDC ohlengahlengiswayo I-Oscilloscope umthombo wesiginali (I-DC Bias) |
| ixesha lovavanyo | 20min() | 5 imizuzu |
| Iingenelo zovavanyo | kulula ukuyifeza | Uvavanyo oluchanekileyo Inokufumana i-DC half-wave voltage kunye ne-RF half-wave voltage ngaxeshanye |
| Iingxaki zovavanyo | Ixesha elide kunye nezinye izinto, uvavanyo aluchanekanga Uvavanyo lomkhweli ngqo lwe-DC half-wave voltage | Ixesha elide kakhulu Izinto ezifana nempazamo enkulu yokugweba nge-waveform, njl.njl., uvavanyo aluchanekanga |
Isebenza ngolu hlobo lulandelayo:
(1) Indlela yexabiso eligqithisileyo
Indlela yexabiso eligqithisileyo isetyenziselwa ukulinganisa i-DC half-wave voltage ye-electro-optic modulator. Okokuqala, ngaphandle kwesignali ye-modulation, i-transfer function curve ye-electro-optic modulator ifunyanwa ngokulinganisa i-DC bias voltage kunye notshintsho lokukhanya okuphumayo, kwaye kwi-transfer function curve Chonga i-maximum value point kunye ne-minimum value point, kwaye ufumane amaxabiso e-DC voltage ahambelanayo i-Vmax kunye ne-Vmin ngokulandelelana. Okokugqibela, umahluko phakathi kwala maxabiso mabini e-voltage yi-half-wave voltage Vπ=Vmax-Vmin ye-electro-optic modulator.
(2) Indlela yokuphinda kabini rhoqo
Yayisebenzisa indlela yokuphinda kabini kwe-frequency ukulinganisa i-RF half-wave voltage ye-electro-optic modulator. Yongeza i-DC bias computer kunye ne-AC modulation signal kwi-electro-optic modulator ngaxeshanye ukuze ulungise i-DC voltage xa i-output light intensity itshintshelwe kwixabiso eliphezulu okanye elincinci. Kwangaxeshanye, kwaye kunokubonwa kwi-dual-trace oscilloscope ukuba i-output modulated signal iya kuvela i-frequency double distortion. Umahluko kuphela we-DC voltage ehambelana ne-frequency double distortions ezimbini ezikufutshane yi-RF half-wave voltage ye-electro-optic modulator.
Isishwankathelo: Zombini indlela yexabiso eligqithisileyo kunye nendlela yokuphinda kabini imvamisa inokulinganisa ngokwethiyori i-voltage ye-half-wave ye-electro-optic modulator, kodwa xa kuthelekiswa, indlela yexabiso elinamandla ifuna ixesha elide lokulinganisa, kwaye ixesha elide lokulinganisa liya kuba ngenxa yamandla okukhanya okuphumayo kwe-laser ayatshintshatshintsha kwaye abangele iimpazamo zokulinganisa. Indlela yexabiso eligqithisileyo kufuneka iskena i-DC bias ngexabiso elincinci lesinyathelo kwaye irekhode amandla okukhanya okuphumayo e-modulator ngaxeshanye ukuze ifumane ixabiso le-voltage ye-half-wave ye-DC echanekileyo ngakumbi.
Indlela yokuphinda kabini kwe-frequency yindlela yokumisela i-voltage yesiqingatha-samaza ngokujonga i-frequency doubling waveform. Xa i-voltage ye-bias esetyenzisiweyo ifikelela kwixabiso elithile, kwenzeka ukuphambuka kokuphindaphinda kwe-frequency, kwaye ukuphambuka kwe-waveform akubonakali kakhulu. Akulula ukukubona ngeliso lenyama. Ngale ndlela, ngokuqinisekileyo kuya kubangela iimpazamo ezibalulekileyo, kwaye into elinganisayo yi-RF half-wave voltage ye-electro-optic modulator.