Chekutanga, Kuchinja kwemukati uye Kuchinja kwekunze
Zvichienderana nehukama huripo pakati pemodulator nelaser, iyokushandurwa kwelaserinogona kukamurwa kuita internal modulation uye external modulation.
01 modulation yemukati
Chiratidzo chemodulation chinoitwa panguva ye laser oscillation, kureva kuti, ma parameter e laser oscillation anochinjwa zvichienderana nemutemo we modulation signal, kuitira kuti ichinje hunhu hwe laser output uye iwane modulation.
(1) Kudzora zvakananga pombi yelaser kuti uwane modulation yesimba relaser rinobuda uye kana riripo, kuitira kuti ridzorwe nemagetsi.
(2) Chinhu che modulation chinoiswa mu resonator, uye shanduko yehunhu hwemuviri hwechinhu che modulation inodzorwa nechiratidzo chekuchinja ma parameter e resonator, nokudaro ichichinja hunhu hwe output ye laser.
02 Kuchinja kwekunze
Kuchinja kwekunze ndiko kupatsanurwa kwekugadzirwa kwelaser nekuchinja. Izvi zvinoreva kurodha kwechiratidzo chakagadziriswa mushure mekuumbwa kwelaser, kureva kuti, modulator inoiswa munzira ye optical kunze kwe laser resonator.
Voltage yechiratidzo chemodulation inowedzerwa kumodulator kuti zvimwe zvinhu zvemuviri zvemodulator phase zvichinje, uye kana laser inopfuura nepakati payo, mamwe ma parameter e light wave anogadziriswa, nokudaro achitakura ruzivo rwunofanirwa kutumirwa. Saka, external modulation haisi yekuchinja ma parameter e laser, asi yekushandura ma parameter e output laser, akadai se intensity, frequency, nezvimwewo.
Chepiri,modulator yelaserkupatsanura
Zvichienderana nekushanda kwemodulator, inogona kupatsanurwa muzvikamu zviviri:kushandurwa kwemagetsi-optic, acoustooptic modulation, magneto-optic modulation uye direct modulation.
01 Kuchinja kwakananga
Kufamba kwemhepo kwelaser ye semiconductorkana kuti light-emitting diode inogadziriswa zvakananga ne electric signal, kuitira kuti output light igadziriswe nekuchinja kwe electrical signal.
(1) Kuchinja kweTTL mukuchinja kwakananga
Chiratidzo chedhijitari cheTTL chinowedzerwa kune simba relaser, kuitira kuti simba relaser drive rigone kudzorwa kuburikidza nechiratidzo chekunze, uye ipapo frequency yekubuda kwelaser inogona kudzorwa.
(2) Kuchinja kweanalog mukuchinja kwakananga
Pamusoro pechiratidzo cheanalog chemagetsi elaser (amplitude iri pasi pe5V isingatarisirwi shanduko yechiratidzo), chinogona kuita kuti chiratidzo chekunze chiise voltage yakasiyana inoenderana nelaser yakasiyana drive current, uye wozodzora simba relaser rinobuda.
02 Kuchinja kweElectro-optic
Kuchinja-chinja kwesimba uchishandisa electro-optic effect kunonzi electro-optic modulation. Hwaro hwe electro-optic modulation i electro-optic effect, kureva kuti, pasi pekushanda kwesimba remagetsi rinoshandiswa, refractive index yemamwe makristaro ichachinja, uye kana light wave ikapfuura nepakati pechinhu ichi, hunhu hwayo hwekutumira huchakanganiswa uye huchachinjwa.
03 Kuchinja kweAcousto-optic
Hwaro hwemuviri hwe acousto-optic modulation i acousto-optic effect, iyo inoreva chiitiko chekuti mafungu echiedza anoparadzirwa kana kuparadzirwa ne supernatural wave field paanenge achipararira mu medium. Kana refractive index ye medium ichichinja nguva nenguva kuti igadzire refractive index grating, diffraction ichaitika kana light wave ichipararira mu medium, uye simba, frequency uye gwara re diffractive light zvichachinja nekuchinja kwe supergenerated wave field.
Kuchinja kweAcousto-optic inzira inoshandiswa nemuviri inoshandisa acousto-optic effect kurodha ruzivo pane optical frequency carrier. Chiratidzo chakagadziriswa chinoshandiswa pa electro-acoustic transducer muchimiro che electrical signal (amplitude modulation), uye chiratidzo chemagetsi chinoenderana chinoshandurwa kuita ultrasonic field. Kana light wave inopfuura nepakati pe acousto-optic medium, optical carrier inogadziriswa uye inova intensity modulated wave iyo "inotakura" ruzivo.
04 Kuchinja kweMagneto-optical
Magneto-optic modulation ibasa reFaraday re electromagnetic optical rotation effect. Kana mafungu echiedza achipararira nepakati pe magneto-optical medium akaenzana negwara re magnetic field, chiitiko chekutenderera kwe polarization plane ye linearly polarized light chinonzi magnetic rotation.
Simba remagineti rinoramba riripo rinoshandiswa panzvimbo iyi kuti magnetic saturation isvike. Kutungamira kwesimba remagineti redunhu kuri munzira ye axial yenzvimbo iyi, uye kutenderera kweFaraday kunoenderana ne axial current magnetic field. Saka, nekudzora simba re high-frequency coil uye kuchinja simba remagineti re axial signal, Angle yekutenderera ye optical vibration plane inogona kudzorwa, kuitira kuti amplitude yechiedza kuburikidza ne polarizer ichinje nekuchinja kwe θ Angle, kuitira kuti pave ne modulation.
Nguva yekutumira: Ndira-08-2024