Hababka tijaabada ee waxqabadka modulator-ka elektiroonigga ah

Hababka tijaabada ee waxqabadkamodulator-ka elektaroonigga ah

1. Tallaabooyinka tijaabada danabka nus-hir ee loogu talagalaymodulator xoojinta elektaroonigga ah

Tusaale ahaan, iyadoo la adeegsanayo danabka nus-hirka ee terminalka RF, isha calaamadda, qalabka la tijaabinayo iyo oscilloscope-ka waxaa lagu xiraa qalab saddex-geesood ah. Marka aad tijaabinayso danabka nus-hirka ee terminalka Bias, ku xidh iyadoo loo eegayo xariiqda dhibcaha leh.

b. Daar isha iftiinka iyo isha calaamadda, oo mari calaamad hirarka sawtooth-ka (soo noqnoqoshada tijaabada caadiga ah waa 1KHz) qalabka la tijaabinayo. Calaamadda hirarka sawtooth-ka Vpp waa inay ka weynaataa laba jibaar danab badh-hir ah.

c. Daar oscilloscope-ka;

d. Calaamadda wax soo saarka ee qalabka ogaanshaha waa calaamadda cosine. Diiwaangeli qiimayaasha danabka hirarka sawtooth V1 iyo V2 ee u dhigma meelaha ugu sarreeya iyo meelaha ku xiga ee calaamaddan. e. Xisaabi danabka nus-hirka sida waafaqsan Qaacidda (3).

2. Tijaabooyinka tijaabada ee danab-badh-hir ahmodulator-ka wejiga elektarooniga ah

Ka dib marka la isku xiro nidaamka tijaabada, farqiga wadada indhaha ee u dhexeeya labada gacmood ee sameeya qaab-dhismeedka interferometer-ka indhaha waa inuu ahaadaa dhererka isku-xidhka. Isha calaamadda iyo terminalka RF ee qalabka la tijaabinayo iyo sidoo kale kanaalka 1aad ee oscilloscope-ka waxaa lagu xiraa qalab saddex-geesood ah. Ka dib marka la isku xiro nidaamka tijaabada, farqiga wadada indhaha ee u dhexeeya labada gacmood ee sameeya qaab-dhismeedka interferometer-ka indhaha waa inuu ahaadaa dhererka isku-xidhka. Isha calaamadda iyo terminalka RF ee qalabka la tijaabinayo iyo sidoo kale kanaalka 1aad ee oscilloscope-ka waxaa lagu xiraa qalab saddex-geesood ah, dekedda gelinta ee oscilloscope-ka waxaa loo hagaajiyaa xaalad is-hortaag sare leh.

b. Daar laysarka iyo isha calaamadda, oo mari calaamad hirarka sawtooth-ka oo ah soo noqnoqosho gaar ah (qiimaha caadiga ah ee 50KHz) qalabka la tijaabinayo. Calaamadda wax soo saarka ee qalabka ogaanaya waa calaamad cosine ah. Vpp-ka calaamadda hirarka sawtooth-ka waa inuu ka weynaadaa laba jibaar danab badh-hir ah, laakiin uusan ka badnayn heerka danab-gelinta ee uu qeexay modulator-ku, si calaamadda cosine-ka wax soo saarka ee qalabka ogaanaya uu u soo bandhigo ugu yaraan hal wareeg oo dhammaystiran.

c. Diiwaangeli qiimayaasha danabka hirarka sawtooth V1 iyo V2 ee u dhigma meelaha ugu sarreeya iyo meelaha ku xiga ee calaamadda cosine;

d. Xisaabi danabka nus-hirka sida waafaqsan Qaacidda (3).

3. Lumitaanka luminta modulators-ka elektiroonigga ah

Tallaabooyinka tijaabada

Ka dib markaad isku xirto isha iftiinka iyo polarizer-ka, shid isha iftiinka oo tijaabi awoodda indhaha ee Pi ee qalabka lagu tijaabiyay iyadoo la adeegsanayo mitir koronto oo indhaha ah.

b. Ku xidh qalabka tijaabada ku jira nidaamka tijaabada, oo ku xidh terminaalada wax soo saarka ee korontada la nidaamiyay biinanka 1 (GND) iyo 2 (Bias) eemodulator(Qaar ka mid ah dufcadaha modulators-ka, biinka 1aad ee modulator-ka ayaa sidoo kale loo baahan yahay in lagu xiro guriga).

c. Hagaaji danabka soo saarista ee korontada la nidaamiyay oo tijaabi akhrinta ugu badan ee mitirka korontada indhaha sida Pout.

d. Haddii qalabka la tijaabinayo uu yahay qalab wax lagu beddelo marxaladda, looma baahna in lagu daro koronto xasilisa danabka. Pout-ka waxaa si toos ah looga akhrin karaa mitirka korontada indhaha.

e. Xisaabi khasaaraha gelinta iyadoo loo eegayo Qaaciddada (1).

Ka taxadaritaan

a. Gelinta indhaha ee qalabka elektaroonigga ah waa inaysan dhaafin qiimaha cabbiraadda ee ku jira warbixinta tijaabada; haddii kale,EO modulatorway dhaawacmi doontaa.

b. Gelinta RF ee modulator-ka elektiroonigga ah waa inaysan dhaafin qiimaha cabbiraadda ee ku yaal xaashida tijaabada; haddii kale, modulator-ka EO wuu dhaawacmi doonaa.

c. Marka la sameynayo qalabka interferometer-ka, waxaa jira shuruudo aad u sarreeya oo loogu talagalay deegaanka isticmaalka. Ruxitaanka deegaanka iyo ruxitaanka fiilada indhaha labaduba waxay saameyn karaan natiijooyinka baaritaanka.