Intshayelelo emfutshane yelaseri-modulatorubuchwepheshe
I-Laser yi-electromagnetic wave ephindaphindayo, ngenxa yokuhambelana kwayo okuhle, njengamaza e-electromagnetic emveli (afana nalawo asetyenziswa kwirediyo nakumabonwakude), njenge-carrier wave yokudlulisa ulwazi. Inkqubo yokulayisha ulwazi kwi-laser ibizwa ngokuba yi-modulation, kwaye isixhobo esenza le nkqubo sibizwa ngokuba yi-modulator. Kule nkqubo, i-laser isebenza njengomthwali, ngelixa isignali ye-low-frequency edlulisela ulwazi ibizwa ngokuba yi-modulated signal.
Ukuguqulwa kwelaser kudla ngokwahlulwahlulwa kukuguqulwa kwangaphakathi kunye nokuguqulwa kwangaphandle ngeendlela ezimbini. Ukuguqulwa kwangaphakathi: kubhekisa ekuguqulweni kwenkqubo yokutshintsha kwelaser, oko kukuthi, ngokuguqula isignali ukuze kutshintshwe iiparameter ze-oscillation zelaser, ngaloo ndlela kuchaphazele iimpawu zemveliso yelaser. Kukho iindlela ezimbini zokuguqulwa kwangaphakathi: 1. Lawula ngokuthe ngqo ukunikezelwa kwamandla okupompa kwelaser ukuze ulungise ubunzulu bemveliso yelaser. Ngokusebenzisa isignali ukulawula ukunikezelwa kwamandla kwelaser, amandla emveliso yelaser anokulawulwa sisignali. 2. Izinto zemodyuli zibekwe kwi-resonator, kwaye iimpawu zomzimba zezi zinto zemodyuli zilawulwa sisignali, kwaye emva koko iiparameter ze-resonator ziyatshintshwa ukuze kufezekiswe ukuguquguquka kwemveliso yelaser. Inzuzo yokuguqulwa kwangaphakathi kukuba ukusebenza kakuhle kwemodyuli kuphezulu, kodwa ingxaki kukuba ngenxa yokuba i-modulator ikwi-cavity, iya kwandisa ilahleko kwi-cavity, inciphise amandla emveliso, kwaye i-bandwidth ye-modulator nayo iya kuthintelwa yi-passband ye-resonator. Ukuguqulwa kwangaphandle: kuthetha ukuba emva kokwenziwa kwelaser, i-modulator ibekwa kwindlela yokukhanya engaphandle kwelaser, kwaye iimpawu zomzimba ze-modulator ziyatshintshwa ngesignali eguquliweyo, kwaye xa i-laser idlula kwi-modulator, iparameter ethile ye-light wave iya kuguqulwa. Iingenelo zokuguqulwa kwangaphandle kukuba amandla okukhupha elaser awachaphazeleki kwaye i-bandwidth yomlawuli ayithintelwa yi-passband ye-resonator. Ingxaki kukusebenza kakuhle kwe-modulation.
Ukuguqulwa kwelaser kunokwahlulwahlulwa kube kukuguqulwa kwe-amplitude, ukuguquguquka kwe-frequency, ukuguquguquka kwesigaba kunye nokuguquguquka kobunzulu ngokweempawu zayo zokuguquguquka. 1, ukuguquguquka kwe-amplitude: ukuguquguquka kwe-amplitude kukushukuma okutshintsha khona i-amplitude yenkampani ngokomthetho wesignali eguquliweyo. 2, ukuguquguquka kwe-frequency: ukuguqula isignali ukutshintsha i-frequency ye-laser oscillation. 3, ukuguquguquka kwesigaba: ukuguqula isignali ukutshintsha isigaba se-laser oscillation laser.
Imodulator yokuqina kwe-electro-optical
Umgaqo wokuguqulwa kwamandla e-electro-optic kukufezekisa ukuguqulwa kwamandla ngokwemigaqo yokuphazamiseka kokukhanya okupholisiweyo ngokusebenzisa isiphumo se-electro-optic sekristale. Isiphumo se-electro-optic sekristale sibhekisa kwinto yokuba isalathisi sokurhawuzelela sekristale sitshintsha phantsi kwesenzo sentsimi yombane yangaphandle, nto leyo ebangela umahluko wesigaba phakathi kokukhanya okudlula kwikristale kwiindlela ezahlukeneyo ze-polarization, ukuze imeko ye-polarization yokukhanya itshintshe.
Imodulator yesigaba se-Electro-optic
Umgaqo wokuguqulwa kwesigaba se-Electro-optical: isigaba I-Angle ye-laser oscillation itshintshwa ngumthetho wokuguqula isignali.
Ukongeza kwi-electro-optic intensity modulation engentla kunye ne-electro-optic phase modulation, kukho iintlobo ezininzi zee-laser modulators, ezifana ne-transverse electro-optic modulator, i-electro-optic traveling wave modulator, i-Kerr electro-optic modulator, i-acousto-optic modulator, i-magnetooptic modulator, i-interference modulator kunye ne-spatial light modulator.
Ixesha lokuthumela: Agasti-26-2024