Sumo pfupi ye lasermodulatortekinoroji
Laser imhepo yemagetsi ine frequency yakakwira, nekuda kwekubatana kwayo kwakanaka, semafungu emagetsi echinyakare (anoshandiswa muredhiyo neterevhizheni), senzira yekutakura ruzivo. Maitiro ekuisa ruzivo pa laser anonzi modulation, uye mudziyo unoita maitiro aya unonzi modulator. Mukuita uku, laser inoshanda senzira yekutakura, nepo chiratidzo chefrequency yakaderera chinotumira ruzivo ichinzi modulated signal.
Kuchinja kweLaser kunowanzo kamurwa kuita internal modulation uye external modulation nenzira mbiri. Internal modulation: zvinoreva kuchinja kwemagetsi panguva ye laser oscillation, ndiko kuti, nekuchinja chiratidzo kuti chishandure ma oscillation parameters e laser, zvichikanganisa maitiro e output e laser. Kune nzira mbiri dze internal modulation: 1. Kudzora zvakananga simba rekupomba re laser kuti ugadzirise simba re laser output. Nekushandisa chiratidzo kudzora laser power supply, simba re laser output rinogona kudzorwa nechiratidzo. 2. Zvinhu zve modulation zvinoiswa mu resonator, uye hunhu hwemuviri hwezvinhu izvi zve modulation hunodzorwa nechiratidzo, uye ipapo ma parameter e resonator anochinjwa kuti awane modulation ye laser output. Chakanakira internal modulation ndechekuti modulation efficiency yakakura, asi dambudziko nderekuti nekuti modulator iri mu cavity, ichawedzera kurasikirwa mu cavity, inoderedza output power, uye bandwidth ye modulator ichaganhurirwawo ne passband ye resonator. Kuchinja kwekunze: zvinoreva kuti mushure mekuumbwa kwelaser, modulator inoiswa panzira ye optical iri kunze kwelaser, uye hunhu hwemuviri hwemodulator hunochinjwa ne modulated signal, uye kana laser inopfuura nepakati pe modulator, imwe parameter ye light wave ichagadziriswa. Zvakanakira zve external modulation ndezvekuti simba rekubuda kwelaser harikanganiswi uye bandwidth ye controller haina kuganhurirwa ne passband ye resonator. Dambudziko nderekuti modulation efficiency yakaderera.
Kuchinja kweLaser kunogona kukamurwa kuita amplitude modulation, frequency modulation, phase modulation uye intensity modulation zvichienderana ne modulation properties dzayo. 1, amplitude modulation: amplitude modulation ndiko kutenderera uko amplitude yemutakuri inochinja nemutemo we modulated signal. 2, frequency modulation: kugadzirisa chiratidzo kuti chishandure frequency ye laser oscillation. 3, phase modulation: kugadzirisa chiratidzo kuti chishandure phase ye laser oscillation.
Modulator yesimba remagetsi-optical
Nheyo ye electro-optic intensity modulation ndeyekuita kuti intensity modulation ienderane nepfungwa yekupindira kwe polarized light uchishandisa electro-optic effect ye crystal. Electro-optical effect ye crystal inoreva chiitiko chekuti refractive index ye crystal inoshanduka pasi pekushanda kwe external electric field, zvichikonzera musiyano we phase pakati pechiedza chinopfuura ne crystal munzira dzakasiyana dze polarization, zvekuti polarization state yechiedza inoshanduka.
Modulator yeElectro-optic phase
Electro-optical phase modulation principle: phase Angle ye laser oscillation inoshandurwa nemutemo we modulating signal.
Kuwedzera kune electro-optic intensity modulation yataurwa pamusoro apa uye electro-optic phase modulation, kune mhando dzakawanda dzema laser modulator, akadai se transverse electro-optic modulator, electro-optic traveling wave modulator, Kerr electro-optic modulator, acousto-optic modulator, magnetooptic modulator, interference modulator uye spatial light modulator.
Nguva yekutumira: Nyamavhuvhu-26-2024