Hoʻopuka pōkole o ka ʻenehana modulator laser

Hoʻopuka pōkole o ka lasermea hoʻololiʻenehana
ʻO Laser kahi hawewe electromagnetic kiʻekiʻe, ma muli o kona pilina maikaʻi, e like me nā hawewe electromagnetic kuʻuna (e like me ka hoʻohana ʻana i ka lekiō a me ke kīwī), ma ke ʻano he nalu lawe e hoʻouna i ka ʻike. ʻO ke kaʻina hana o ka hoʻouka ʻana i ka ʻike ma luna o ka laser i kapa ʻia ʻo modulation, a ʻo ka mea hana e hana i kēia kaʻina i kapa ʻia he modulator. Ma kēia kaʻina hana, hana ka laser ma ke ʻano he mea lawe, aʻo ka hōʻailona haʻahaʻa haʻahaʻa e hoʻouna i ka ʻike i kapa ʻia ʻo ka hōʻailona modulated.
Hoʻokaʻawale pinepine ʻia ka modulation laser i ka modulation kūloko a me ka modulation waho i ʻelua ala. ʻO ka modulation kūloko: pili i ka modulation i ke kaʻina o ka laser oscillation, ʻo ia hoʻi, ma ka hoʻololi ʻana i ka hōʻailona e hoʻololi i nā ʻāpana oscillation o ka laser, no laila e pili ana i nā hiʻohiʻona o ka laser. ʻElua mau ala o ka hoʻololi ʻana i loko: 1. E hoʻomalu pono i ka mana pumping o ka laser e hoʻoponopono i ka ikaika o ka hopena laser. Ma ka hoʻohana ʻana i ka hōʻailona e hoʻomalu i ka mana laser, hiki ke hoʻokele ʻia ka ikaika o ka hoʻopuka laser e ka hōʻailona. 2. Hoʻokomoʻia nā mea hoʻololi i ka resonator, aʻo nāʻano kino o kēia mau mea hoʻololi e hoʻomaluʻia e ka hōʻailona, ​​a laila ua hoʻololiʻia nā palena o ka resonator e hoʻokō i ka modulation o ka hopena laser. ʻO ka maikaʻi o ka modulation kūloko he kiʻekiʻe ka maikaʻi o ka modulation, akā ʻo ka hemahema ʻo ia no ka mea aia ka modulator i loko o ka lua, e hoʻonui ia i ka poho i loko o ka lua, e hoʻemi i ka mana hoʻopuka, a e lilo pū ka bandwidth o ka modulator. kaupalena ʻia e ka passband o ka resonator. ʻO ka modulation waho: ʻo ia hoʻi ma hope o ka hoʻokumu ʻia ʻana o ka laser, ua kau ʻia ka modulator ma ke ala optical ma waho o ka laser, a ua hoʻololi ʻia nā ʻano kino o ka modulator me ka hōʻailona modulated, a i ka wā e hele ai ka laser i ka modulator, kahi ʻāpana. o ka nalu māmā e hoʻololi ʻia. ʻO nā mea maikaʻi o ka modulation waho ʻaʻole i hoʻopili ʻia ka mana o ka laser a ʻaʻole i kaupalena ʻia ka bandwidth o ka mea hoʻoponopono e ka passband o ka resonator. ʻO ka hemahema ka haʻahaʻa modulation pono.
Hiki ke hoʻokaʻawale ʻia ka laser modulation i ka amplitude modulation, frequency modulation, phase modulation a me ka ikaika modulation e like me kāna mau waiwai modulation. 1, amplitude modulation: amplitude modulation ka oscillation i hoʻololi ʻia ka amplitude o ka mea lawe me ke kānāwai o ka hōʻailona modulated. 2, hoʻololi pinepine: e hoʻololi i ka hōʻailona e hoʻololi i ke alapine o ka oscillation laser. 3, hoʻololi i ka ʻāpana: e hoʻololi i ka hōʻailona e hoʻololi i ka pae o ka laser oscillation laser.

Electro-optical ikaika modulator
ʻO ka loina o ka electro-optic intensity modulation ka ʻike ʻana i ka hoʻololi ʻana i ka ikaika e like me ke kumu interference o ke kukui polarized ma o ka hoʻohana ʻana i ka hopena electro-optic o ke aniani. ʻO ka hopena electro-optical o ke aniani e pili ana i ke ʻano o ka hoʻololi ʻana o ka index refractive o ka aniani ma lalo o ka hana o ke kahua uila waho, e hopena i kahi ʻokoʻa ma waena o ka mālamalama e hele ana i ka aniani ma nā ʻaoʻao polarization like ʻole, i hiki ai i ka polarization. lolie ke kulana o ka malamalama.

Electro-optic phase modulator
Electro-optical phase modulation principle: the phase Angle of laser oscillation is changed by the rule of modulating signal.

Ma kahi o ka modulation electro-optic intensity modulation a me ka electro-optic phase modulation, he nui nā ʻano modulators laser, e like me transverse electro-optic modulator, electro-optic wave modulator, Kerr electro-optic modulator, acousto-optic modulator. , modulator magnetooptic, modulator interference a me modulator kukui spatial.