Mitundu ya laser modulators

Choyamba, Kusintha kwa mkati ndi kusintha kwakunja
Malinga ndi ubale wachibale pakati pa modulator ndi laser, thekusintha kwa laserakhoza kugawidwa mu kusintha kwa mkati ndi kusinthasintha kwa kunja.

01 kusinthidwa kwamkati
Chizindikiro chosinthira chimachitika pakadutsa laser oscillation, ndiye kuti, magawo a laser oscillation amasinthidwa malinga ndi lamulo la siginecha yosinthira, kuti asinthe mawonekedwe amtundu wa laser ndikukwaniritsa kusinthasintha.
(1) Mwachindunji kulamulira pampu laser gwero kukwaniritsa kusinthasintha kwa linanena bungwe mphamvu laser ndi ngati pali, kotero kuti umalamulidwa ndi magetsi.
(2) Chigawo chosinthira chimayikidwa mu resonator, ndipo kusintha kwa mawonekedwe a thupi la chinthu chosinthira kumayendetsedwa ndi chizindikiro kuti chisinthe magawo a resonator, motero kusintha mawonekedwe a laser.

02 Kusintha kwakunja
Kusinthasintha kwakunja ndiko kulekanitsa kwa m'badwo wa laser ndi kusinthasintha. Amatanthawuza kukweza kwa chizindikiro chosinthidwa pambuyo pa kupangidwa kwa laser, ndiko kuti, modulator imayikidwa munjira ya kuwala kunja kwa laser resonator.
Mphamvu yamagetsi yosinthira imawonjezedwa ku modulator kuti ipangitse mawonekedwe ena amtundu wa modulator gawo, ndipo laser ikadutsamo, magawo ena amagetsi amasinthidwa, motero amanyamula chidziwitsocho kuti chifalitsidwe. Choncho, kusinthasintha kwakunja sikusintha magawo a laser, koma kusintha magawo a laser linanena bungwe, monga mphamvu, pafupipafupi, ndi zina zotero.

Chachiwiri,laser modulegulu
Malingana ndi momwe ma modulator amagwirira ntchito, amatha kugawidwa kukhalaelectro-optic modulation, ma acoustooptic modulation, maginito-optic modulation ndi modulation mwachindunji.

01 Kusintha kwachindunji
Mayendedwe apano alaser semiconductorkapena diode yotulutsa kuwala imasinthidwa mwachindunji ndi chizindikiro chamagetsi, kotero kuti kuwala kotuluka kumasinthidwa ndi kusintha kwa chizindikiro cha magetsi.

(1) TTL modulation mwachindunji modulation
Chizindikiro cha digito cha TTL chimawonjezedwa kumagetsi a laser, kuti ma laser drive pano azitha kuwongoleredwa kudzera pa chizindikiro chakunja, ndiyeno ma frequency a laser amatha kuwongoleredwa.

(2) Kusintha kwa analogi mu kusintha kwachindunji
Kuwonjezera laser mphamvu kotunga analogi chizindikiro (matalikidwe zosakwana 5V umasinthasintha kusintha chizindikiro yoweyula), akhoza kupanga kunja chizindikiro athandizira osiyana voteji lolingana ndi laser osiyana pagalimoto panopa, ndiyeno kulamulira linanena bungwe laser mphamvu.

02 Electro-optic modulation
Kusinthasintha pogwiritsa ntchito electro-optic effect kumatchedwa electro-optic modulation. Maziko akuthupi a electro-optic modulation ndi electro-optic effect, ndiko kuti, pansi pa mphamvu ya magetsi ogwiritsidwa ntchito, chiwerengero cha refractive cha makristasi ena chidzasintha, ndipo pamene mafunde a kuwala akudutsa mu sing'anga iyi, mawonekedwe ake opatsirana adzasintha. kukhudzidwa ndi kusinthidwa.

03 Kusintha kwa Acousto-Optic
Maziko akuthupi a acousto-optic modulation ndi mphamvu ya acousto-optic, yomwe imatanthawuza chodabwitsa kuti mafunde a kuwala amafalikira kapena kumwazikana ndi mphamvu yamatsenga pamene akufalikira pakati. Pamene refractive index ya sing'anga imasintha nthawi ndi nthawi kuti ipangitse refractive index grating, diffraction idzachitika pamene mafunde a kuwala akufalikira pakati, ndipo mphamvu, mafupipafupi ndi njira ya kuwala kosiyana idzasintha ndi kusintha kwa gawo la supergenerated wave.
Acousto-optic modulation ndi njira yakuthupi yomwe imagwiritsa ntchito ma acousto-optic kuti ikweze zambiri pa chonyamulira pafupipafupi. Chizindikiro chosinthidwa chimachitidwa pa electro-acoustic transducer mu mawonekedwe a magetsi (amplitude modulation), ndipo chizindikiro chamagetsi chofananira chimasinthidwa kukhala gawo la akupanga. Pamene mafunde a kuwala akudutsa mu acousto-optic medium, chonyamulira cha kuwala chimasinthidwa ndikukhala mphamvu yosinthika yomwe "imanyamula" chidziwitso.

04 Magneto-optical modulation
Magneto-optic modulation ndikugwiritsa ntchito Faraday's electromagnetic optical rotation effect. Mafunde a kuwala akamafalikira kudzera mu sing'anga ya magneto-optical yofanana ndi njira ya maginito, chodabwitsa cha kuzungulira kwa ndege ya polarization ya kuwala kozungulira kumatchedwa maginito kuzungulira.
Mphamvu ya maginito yokhazikika imagwiritsidwa ntchito pakatikati kuti ikwaniritse maginito. Mayendedwe a maginito ozungulira ali kumtunda wa axial wa sing'anga, ndipo kuzungulira kwa Faraday kumadalira mphamvu ya maginito ya axial. Choncho, poyang'anira zamakono za koyilo yapamwamba kwambiri komanso kusintha mphamvu ya maginito ya chizindikiro cha axial, kusinthasintha kwa Angle ya ndege yowonongeka kungathe kuwongoleredwa, kotero kuti matalikidwe a kuwala kupyolera mu polarizer amasintha ndi kusintha kwa θ Angle. , kuti mukwaniritse kusinthasintha.