Choyamba, kusintha kwa mkati ndi kusintha kwakunja
Malinga ndi ubale wapakati pa modulator ndi laser,kusintha kwa laserzingagawidwe m'magulu awiri: mkati ndi kunja.
01 kusintha kwamkati
Chizindikiro cha modulation chimachitika mu njira ya laser oscillation, ndiko kuti, magawo a laser oscillation amasinthidwa malinga ndi lamulo la chizindikiro cha modulation, kuti asinthe mawonekedwe a laser output ndikukwaniritsa modulation.
(1) Yang'anirani mwachindunji gwero la pampu ya laser kuti mukwaniritse kusintha kwa mphamvu ya laser yotulutsa komanso ngati ilipo, kuti ilamulidwe ndi magetsi.
(2) Chinthu chosinthira chimayikidwa mu resonator, ndipo kusintha kwa makhalidwe akuthupi a chinthu chosinthira kumayendetsedwa ndi chizindikiro kuti chisinthe magawo a resonator, motero kusintha makhalidwe otulutsa a laser.
02 Kusintha kwakunja
Kusintha kwakunja ndi kulekanitsa kupanga ndi kusintha kwa laser. Kumatanthauza kukweza kwa chizindikiro chosinthidwa pambuyo pa kupangidwa kwa laser, ndiko kuti, modulator imayikidwa mu njira yowunikira kunja kwa resonator ya laser.
Mphamvu ya chizindikiro cha modulation imawonjezeredwa ku modulator kuti zinthu zina zakuthupi za gawo la modulator zisinthe, ndipo laser ikadutsamo, magawo ena a mafunde a kuwala amasinthidwa, motero kunyamula chidziwitso chomwe chikuyenera kutumizidwa. Chifukwa chake, kusintha kwakunja sikusintha magawo a laser, koma kusintha magawo a laser yotulutsa, monga mphamvu, ma frequency, ndi zina zotero.
Chachiwiri,modulator ya laserkugawa magulu
Malinga ndi njira yogwirira ntchito ya modulator, ikhoza kugawidwa m'magulu awiri:kusintha kwa magetsi ndi kuwala, kusintha kwa acoustooptic, kusintha kwa magneto-optic ndi kusintha kwachindunji.
01 Kusinthasintha kwachindunji
Mphamvu yoyendetsa yalaser ya semiconductorkapena diode yotulutsa kuwala imasinthidwa mwachindunji ndi chizindikiro chamagetsi, kotero kuti kuwala kotuluka kumasinthidwa ndi kusintha kwa chizindikiro chamagetsi.
(1) Kusintha kwa TTL mu kusintha kwachindunji
Chizindikiro cha digito cha TTL chimawonjezedwa ku magetsi a laser, kotero kuti mphamvu ya laser drive ikhoza kuyendetsedwa kudzera mu chizindikiro chakunja, kenako mafupipafupi otulutsa laser amatha kulamulidwa.
(2) Kusintha kwa analogi mu kusintha kwachindunji
Kuwonjezera pa chizindikiro cha analog cha magetsi a laser (makulidwe ochepera 5V mafunde osintha mosasamala), chizindikiro chakunja chingapangitse kuti magetsi osiyanasiyana alowetsedwe molingana ndi mphamvu yamagetsi ya laser, kenako n’kulamulira mphamvu ya laser yotulutsa.
02 Kusintha kwa Electro-optic
Kusinthasintha kwa magetsi pogwiritsa ntchito mphamvu ya electro-optic kumatchedwa electro-optic modulation. Maziko enieni a electro-optic modulation ndi mphamvu ya electro-optic, kutanthauza kuti, pansi pa mphamvu ya magetsi yomwe yagwiritsidwa ntchito, chizindikiro cha refractive cha makristalo ena chidzasintha, ndipo pamene mafunde a kuwala adutsa mu medium iyi, makhalidwe ake otumizira magetsi adzasinthidwa ndi kusinthidwa.
03 Kusintha kwa ma Acousto-optic
Maziko enieni a acousto-optic modulation ndi acousto-optic effect, yomwe imatanthauza chochitika chakuti mafunde a kuwala amafalikira kapena kufalikira ndi munda wa mafunde auzimu akamafalikira mu sing'anga. Pamene chizindikiro cha refractive cha sing'anga chimasintha nthawi ndi nthawi kuti chipange refractive index grating, diffraction idzachitika pamene mafunde a kuwala afalikira mu sing'anga, ndipo mphamvu, mafupipafupi, ndi malangizo a kuwala kofalikira zidzasintha ndi kusintha kwa munda wa mafunde wopangidwa ndi supergenerated.
Kusinthasintha kwa ma acousto-optic ndi njira yeniyeni yomwe imagwiritsa ntchito mphamvu ya acousto-optic kuti ikweze zambiri pa chonyamulira ma frequency cha kuwala. Chizindikiro chosinthidwa chimagwira ntchito pa electro-acoustic transducer mu mawonekedwe a chizindikiro chamagetsi (amplitude modulation), ndipo chizindikiro chamagetsi chofananacho chimasinthidwa kukhala munda wa ultrasonic. Pamene mafunde a kuwala adutsa mu acousto-optic medium, chonyamulira cha kuwala chimasinthidwa ndipo chimakhala mafunde osinthidwa mphamvu omwe "amanyamula" zambiri.
04 Magneto-optical modulation
Magneto-optic modulation ndi kugwiritsa ntchito mphamvu ya Faraday yozungulira maginito. Pamene mafunde a kuwala afalikira kudzera mu magneto-optical medium motsatira njira ya maginito, chodabwitsa cha kuzungulira kwa polarization plane ya kuwala kozungulira molunjika chimatchedwa magnetic rotation.
Mphamvu ya maginito yosasinthika imagwiritsidwa ntchito pa sing'anga kuti ikwaniritse kuchuluka kwa maginito. Njira ya mphamvu ya maginito ya dera ili mbali ya axial ya sing'anga, ndipo kuzungulira kwa Faraday kumadalira mphamvu ya maginito ya axial current. Chifukwa chake, powongolera mphamvu ya coil ya ma frequency apamwamba ndikusintha mphamvu ya mphamvu ya maginito ya chizindikiro cha axial, Angle yozungulira ya ndege ya optical vibration imatha kulamulidwa, kotero kuti amplitude ya kuwala kudzera mu polarizer imasintha ndi kusintha kwa Angle ya θ, kuti ikwaniritse kusintha.
Nthawi yotumizira: Januwale-08-2024