Iindlela zovavanyo lokusebenza kwei-electro-optic modulator
1. Amanyathelo ovavanyo lwe-voltage yesiqingatha-samazai-electro-optic intensity modulator
Ukuthatha i-voltage yesiqingatha-samaza kwi-terminal ye-RF njengomzekelo, umthombo wesignali, isixhobo esivavanywayo kunye ne-oscilloscope ziqhagamshelwe ngesixhobo esineendlela ezintathu. Xa uvavanya i-voltage yesiqingatha-samaza kwi-terminal ye-Bias, yiqhagamshele ngokwemigca enamachaphaza.
b. Vula umthombo wokukhanya kunye nomthombo wesignali, kwaye ufake isignali ye-sawtooth wave (uvavanyo oluqhelekileyo yi-1KHz) kwisixhobo esivavanywayo. Isignali ye-sawtooth wave Vpp kufuneka ibe ngaphezulu kwe-voltage yesiqingatha se-wave.
c. Vula i-oscilloscope;
d. Isignali yokuphuma kwesixhobo sokufumana umbane sisignali ye-cosine. Bhala phantsi ixabiso le-voltage ye-sawtooth wave V1 kunye ne-V2 ehambelana neencochoyi kunye nee-troughs ezikufutshane zale signal. e. Bala i-voltage yesiqingatha se-wave ngokweFomula (3).
2. Amanyathelo okuvavanya i-voltage yesiqingatha-samazai-electro-optic phase modulator
Emva kokudibanisa inkqubo yovavanyo, umahluko wendlela yokukhanya phakathi kweengalo ezimbini ezenza isakhiwo se-interferometer yokukhanya kufuneka ube ngaphakathi kobude bokuhambelana. Umthombo wesignali kunye nesiphelo se-RF sesixhobo esivavanywayo kunye netshaneli 1 ye-oscilloscope ziqhagamshelwe ngesixhobo esineendlela ezintathu. Emva kokudibanisa inkqubo yovavanyo, umahluko wendlela yokukhanya phakathi kweengalo ezimbini ezenza isakhiwo se-interferometer yokukhanya kufuneka ube ngaphakathi kobude bokuhambelana. Umthombo wesignali kunye nesiphelo se-RF sesixhobo esivavanywayo kunye netshaneli 1 ye-oscilloscope ziqhagamshelwe ngesixhobo esineendlela ezintathu, kwaye i-input port ye-oscilloscope ihlengahlengiswa kwi-high-impedance state.
b. Vula i-laser kunye nomthombo wesignali, kwaye ufake isignali ye-sawtooth wave ye-frequency ethile (ixabiso eliqhelekileyo le-50KHz) kwisixhobo esivavanywayo. Isignali yokuphuma kwe-detector sisignali ye-cosine. I-Vpp yesignali ye-sawtooth wave kufuneka ibe ngaphezulu kwe-voltage yesiqingatha se-wave, kodwa ingadluli kuluhlu lwe-voltage yokufaka oluchazwe yi-modulator, ukuze isignali ye-cosine yokuphuma ye-detector ibonise ubuncinane umjikelo omnye opheleleyo.
c. Bhala phantsi ixabiso le-voltage ye-sawtooth wave V1 kunye ne-V2 ehambelana neencochoyi kunye nemigxobhozo ekufutshane yesignali ye-cosine;
d. Bala i-voltage yesiqingatha-samaza ngokweFomula (3).
3. Ukulahleka kokufakwa kwee-electro-optic modulators
Amanyathelo ovavanyo
Emva kokudibanisa umthombo wokukhanya kunye ne-polarizer, vula umthombo wokukhanya kwaye uvavanye amandla okukhanya angenayo e-Pi yesixhobo esivavanywayo ngemitha yamandla okukhanya.
b. Qhagamshela isixhobo esivavanywayo kwinkqubo yovavanyo, kwaye uqhagamshele ii-output terminals zombane olawulwayo kwiiphini 1 (GND) kunye ne-2(Bias) zei-modulator(kwezinye iibhetshi zeemodulators, iphini 1 yemodulator nayo kufuneka iqhagamshelwe kwi-housing).
c. Lungisa i-output voltage yombane olawulwayo kwaye uvavanye ukufundwa okuphezulu kwemitha yamandla e-optical njenge-Pout.
d. Ukuba isixhobo esivavanywayo sisixhobo sokulawula i-phase modulator, akukho mfuneko yokongeza umbane ozinzileyo we-voltage. I-Pout ingafundwa ngokuthe ngqo kwi-optical power meter.
e. Bala ilahleko yokufakwa ngokweFomula (1).
Ukulumkela
a. Igalelo le-optical le-electro-optic modulator akufuneki lidlule ixabiso lokulinganisa kwingxelo yovavanyo; kungenjalo,Imodulator ye-EOiya konakala.
b. Igalelo le-RF le-electro-optic modulator akufuneki lidlule ixabiso lokulinganisa kwiphepha lovavanyo; kungenjalo, i-EO modulator iya konakala.
c. Xa useta i-interferometer, kukho iimfuno eziphezulu kakhulu kwindawo yokusetyenziswa. Ukushukuma kwendalo kunye nokushukuma kwefayibha ye-optical zombini zinokuchaphazela iziphumo zovavanyo.
Ixesha lokuthumela: Agasti-05-2025