Okokuqala, ukushintshashintsha kwangaphakathi nokushintshashintsha kwangaphandle
Ngokobudlelwano obuhlobene phakathi kwe-modulator ne-laser, iukuguqulwa kwe-laseringahlukaniswa ibe ukuguquguquka kwangaphakathi kanye nokuguquguquka kwangaphandle.
01 ukushintshashintsha kwangaphakathi
Isignali yokushintshashintsha yenziwa ngenqubo ye-laser oscillation, okungukuthi, imingcele ye-laser oscillation iyashintshwa ngokuvumelana nomthetho wesignali ye-modulation, ukuze kuguqulwe izici zokukhishwa kwe-laser futhi kuzuzwe ukuguquguquka.
(1) Lawula ngokuqondile umthombo wephampu ye-laser ukuze uzuze ukushintshwa kokuqina kwe-laser okukhiphayo nokuthi akhona yini, ukuze ulawulwe ukunikezwa kwamandla.
(2) Isici sokuguquguquka sibekwe ku-resonator, futhi ukuguqulwa kwezici zomzimba ze-modulation element kulawulwa isignali ukushintsha imingcele ye-resonator, ngaleyo ndlela iguqule izici zokukhishwa kwe-laser.
02 Ukushintshashintshashintsha kwangaphandle
Ukuguquguquka kwangaphandle ukuhlukaniswa kokukhiqizwa kwe-laser nokuguquguquka.Isho ukulayishwa kwesignali eshintshiwe ngemva kokwakhiwa kwe-laser, okungukuthi, i-modulator ibekwe endleleni yokubona ngaphandle kwe-laser resonator.
I-voltage yesignali yokushintshashintsha yengezwa kumodeli ukwenza izici ezithile zomzimba zesigaba semoduli sishintshe, futhi lapho i-laser idlula kuyo, amanye amapharamitha wegagasi lokukhanya ayashintshwa, ngaleyo ndlela athwale ulwazi oluzodluliselwa.Ngakho-ke, ukuguqulwa kwangaphandle akukona ukushintsha imingcele ye-laser, kodwa ukushintsha imingcele ye-laser ephumayo, njengokuqina, imvamisa, njalonjalo.
Okwesibili,i-modulator ye-laserukuhlukaniswa
Ngokusho kwendlela yokusebenza ye-modulator, ingahlukaniswa ibeukuguqulwa kwe-electro-optic, i-acoustooptic modulation, i-magneto-optic modulation kanye nokuguquguquka okuqondile.
01 Ukushintshashintsha kwezwi okuqondile
Umsinga wokushayela we-I-semiconductor lasernoma i-diode ekhipha ukukhanya ilungiswa ngokuqondile ngesignali kagesi, ukuze ukukhanya okukhiphayo kulungiswe ngokushintsha kwesignali kagesi.
(1) Ukuguqulwa kwe-TTL ekuguquguqukeni okuqondile
Isignali yedijithali ye-TTL yengezwa kugesi we-laser, ukuze i-laser drive current ilawulwe ngesignali yangaphandle, bese kuthi i-laser output frequency ilawulwe.
(2) Ukuguqulwa kwe-analog ekuguquguqukeni okuqondile
Ngokungeziwe kusiginali ye-analog ye-laser power supply (amplitude engaphansi kuka-5V ngokushintshashintsha kwesiginali igagasi), ingenza isignali yangaphandle okokufaka i-voltage ehlukile ehambisana ne-laser ehlukile yedrayivu yamanje, bese ilawula amandla e-laser okukhiphayo.
02 Ukushintshwa kwe-electro-optic
Ukuguquguquka kwe-electro-optic kubizwa ngokuthi i-electro-optic modulation.Isisekelo esingokomzimba sokushintshwa kwe-electro-optic umphumela we-electro-optic, okungukuthi, ngaphansi kwesenzo senkundla kagesi esetshenzisiwe, inkomba ye-refractive yamanye amakristalu izoshintsha, futhi lapho igagasi lokukhanya lidlula kule ndlela, izici zayo zokudlulisela zizoshintsha. bathinteke futhi bashintshwe.
03 Ukushintshashintsha kwe-Acousto-optic
Isisekelo esibonakalayo sokushintshwa kwe-acousto-optic umphumela we-acousto-optic, obhekisela kwinto yokuthi amaza okukhanya asakazwa noma ahlakazwe inkambu yamagagasi angaphezu kwawemvelo lapho esakaza phakathi nendawo.Lapho inkomba ye-refractive ye-medium ishintsha ngezikhathi ezithile ukuze yakhe inkomba ye-refractive index grating, i-diffraction izokwenzeka lapho igagasi lokukhanya lisakazeka phakathi nendawo, futhi ukuqina, imvamisa kanye nesiqondiso sokukhanya kwe-diffractive kuzoshintsha ngokushintsha inkambu yegagasi elikhudlwana.
I-Acousto-optic modulation iyinqubo ephathekayo esebenzisa umthelela we-acousto-optic ukulayisha ulwazi kusithwali sefrikhwensi yokubona.Isignali eshintshiwe yenziwa ku-transducer ye-electro-acoustic ngendlela yesignali kagesi (i-amplitude modulation), futhi isignali kagesi ehambisanayo iguqulwa ibe insimu ye-ultrasonic.Uma igagasi lokukhanya lidlula ku-acousto-optic medium, isithwali esibonakalayo siyashintshwa sibe yigagasi eliguquliwe elinamandla “elithwala” ulwazi.
04 Ukushintshashintsha kweMagneto-optical
I-Magneto-optic modulation uhlelo lokusebenza lomthelela we-Faraday's electromagnetic optical rotation effect.Lapho amaza okukhanya esakazeka phakathi kwe-magneto-optical medium parallel ukuya lapho kuqondiswa khona indawo kazibuthe, isenzakalo sokuzungezisa kwendiza ye-polarization yokukhanya kwe-polarized kubizwa ngokuthi ukuzungezisa kazibuthe.
Inkambu kazibuthe engaguquki isetshenziswa endaweni ephakathi ukuze kuzuzwe ukugcwala kukazibuthe.Isiqondiso sesifunda samagnetic sisendleleni ye-axial ye-medium, futhi ukujikeleza kwe-Faraday kuncike ku-axial yamanje kazibuthe.Ngakho-ke, ngokulawula i-current ye-high-frequency coil nokuguqula amandla kazibuthe wesignali ye-axial, i-Angle yokuzungeza yendiza yokudlidliza ebonakalayo ingalawulwa, ukuze i-amplitude yokukhanya ngokusebenzisa i-polarizer ishintshe ngokushintsha kwe-θ Angle. , ukuze kuzuzwe ukushintshashintsha kwezwi.
Isikhathi sokuthumela: Jan-08-2024