Okokuqala, ukuguqulwa kwangaphakathi kanye nokuguqulwa kwangaphandle
Ngokusho kobudlelwano obuphakathi kwe-modulator ne-laser, i-ukuguqulwa kwe-laseringahlukaniswa ngokuguquguquka kwangaphakathi kanye nokuguquguquka kwangaphandle.
01 ukuguqulwa kwangaphakathi
Isignali yokuguquguquka yenziwa enkambisweni yokuguquguquka kwe-laser, okungukuthi, amapharamitha okuguquguquka kwe-laser ayashintshwa ngokomthetho wesignali yokuguquguquka, ukuze kushintshwe izici zokukhishwa kwe-laser futhi kufezwe ukuguquguquka.
(1) Lawula ngqo umthombo wephampu yelaser ukuze ufinyelele ukuguqulwa kwamandla elaser okukhiphayo nokuthi ngabe kukhona yini, ukuze ulawulwe ugesi.
(2) Isici sokuguquguquka sifakwa ku-resonator, futhi ushintsho lwezici zomzimba zesici sokuguquguquka lulawulwa yisiginali yokushintsha amapharamitha e-resonator, ngaleyo ndlela kushintshwe izici zokukhipha ze-laser.
02 Ukuguqulwa kwangaphandle
Ukuguqulwa kwangaphandle ukuhlukaniswa kokukhiqizwa kwe-laser kanye nokuguqulwa. Kubhekisela ekulayishweni kwesignali eguquliwe ngemva kokwakheka kwe-laser, okungukuthi, i-modulator ibekwa endleleni yokukhanya ngaphandle kwe-resonator ye-laser.
I-voltage yesignali yokuguquguquka yengezwa ku-modulator ukuze kwenziwe ezinye izici zomzimba zesigaba se-modulator zishintshe, futhi lapho i-laser idlula kuyo, amanye amapharamitha wegagasi lokukhanya ayaguqulwa, ngaleyo ndlela ethwala ulwazi oluzodluliselwa. Ngakho-ke, ukuguqulwa kwangaphandle akukhona ukushintsha amapharamitha e-laser, kodwa ukushintsha amapharamitha e-laser yokukhipha, njengokuqina, imvamisa, njalo njalo.
Okwesibili,i-modulator ye-laserukuhlukaniswa
Ngokusho kwendlela yokusebenza ye-modulator, ingahlukaniswa ngezigaba:ukuguqulwa kwe-electro-optic, ukuguqulwa kwe-acoustooptic, ukuguqulwa kwe-magneto-optic kanye nokuguqulwa okuqondile.
01 Ukuguqulwa okuqondile
Umshini wokushayela we-i-laser ye-semiconductornoma i-diode ekhipha ukukhanya iguqulwa ngqo yisignali kagesi, ukuze ukukhanya okuphumayo kuguqulwe ngokushintsha kwesignali kagesi.
(1) Ukuguqulwa kwe-TTL ekuguqulweni okuqondile
Isignali yedijithali ye-TTL ingezwa ekuhlinzekweni kwamandla kwe-laser, ukuze ugesi we-laser drive ukwazi ukulawulwa ngesignali yangaphandle, bese imvamisa yokukhishwa kwe-laser ingalawulwa.
(2) Ukuguqulwa kwe-analog ekuguqulweni okuqondile
Ngaphezu kwesignali ye-analog yokunikezwa kwamandla e-laser (ububanzi obungaphansi kwe-5V, igagasi lesignali yokushintsha okungahleliwe), ingenza isignali yangaphandle ifake i-voltage ehlukile ehambisana ne-laser drive current ehlukile, bese ilawula amandla e-laser okukhiphayo.
02 Ukuguqulwa kwe-Electro-optic
Ukushintshashintsha okusebenzisa umphumela we-electro-optic kubizwa ngokuthi ukuguquguquka kwe-electro-optic. Isisekelo esingokoqobo sokuguquguquka kwe-electro-optic umphumela we-electro-optic, okungukuthi, ngaphansi kwesenzo sensimu kagesi esetshenzisiwe, inkomba yokukhanya kwamakristalu athile izoshintsha, futhi lapho igagasi lokukhanya lidlula kule ndlela, izici zalo zokudlulisela zizothinteka futhi zishintshwe.
03 Ukuguqulwa kwe-Acousto-optic
Isisekelo esingokoqobo sokuguqulwa kwe-acousto-optic umphumela we-acousto-optic, obhekisela esimweni sokuthi amaza okukhanya ayasakazwa noma ahlakazwe yinsimu yamagagasi angaphezu kwawemvelo lapho esakazeka endaweni ephakathi. Lapho inkomba yokukhanya ye-medium ishintsha ngezikhathi ezithile ukuze yakhe i-grating yenkomba yokukhanya, i-diffraction izokwenzeka lapho igagasi lokukhanya lisakazeka endaweni ephakathi, futhi ukuqina, imvamisa kanye nesiqondiso sokukhanya okusabalalisa kuzoshintsha ngokushintsha kwensimu yamagagasi akhiqizwa kakhulu.
Ukuguqulwa kwe-Acousto-optic kuyinqubo ebonakalayo esebenzisa umphumela we-acousto-optic ukulayisha ulwazi ku-optical frequency carrier. Isignali eguquliwe isebenza ku-electro-acoustic transducer ngesimo sesignali kagesi (amplitude modulation), bese isignali kagesi ehambisanayo iguqulwa ibe yinsimu ye-ultrasonic. Lapho igagasi lokukhanya lidlula ku-acousto-optic medium, i-optical carrier iyaguquguqulwa futhi iba yigagasi eliguquliwe lokuqina "elithwala" ulwazi.
04 Ukuguqulwa kwe-Magneto-optical
Ukuguqulwa kwe-Magneto-optic kuyindlela yokusebenzisa umphumela wokujikeleza kwe-electromagnetic optical kaFaraday. Lapho amaza okukhanya esakazeka nge-magneto-optical medium ehambisana nesiqondiso sensimu yamagnetic, isimo sokujikeleza kwendiza ye-polarization yokukhanya oku-linearly polarized sibizwa ngokuthi i-magnetic rotation.
Insimu yamagnetic engaguquki isetshenziswa endaweni yokuxhumana ukuze kufezwe ukugcwala kwamagnetic. Isiqondiso sensimu yamagnetic yesekethe sisehlangothini lwe-axial ye-medium, futhi ukujikeleza kwe-Faraday kuncike ensimini yamagnetic yamanje ye-axial. Ngakho-ke, ngokulawula ugesi wekhoyili yemvamisa ephezulu nokushintsha amandla ensimu yamagnetic yesignali ye-axial, i-Angle yokujikeleza yendiza yokudlidliza kwe-optical ingalawulwa, ukuze ubukhulu bokukhanya nge-polarizer bushintshe ngokushintsha kwe-Angle ye-θ, ukuze kufezwe ukuguqulwa.
Isikhathi sokuthunyelwe: Jan-08-2024