Kakaretso ea li-modulator tse 'ne tse tloaelehileng

Kakaretso ea li-modulator tse 'ne tse tloaelehileng

Pampiri ena e hlahisa mekhoa e mene ea ho fetola molumo (ho fetola boholo ba laser sebakeng sa nanosecond kapa subnanosecond time domain) e sebelisoang haholo litsamaisong tsa laser ea fiber. Tsena li kenyelletsa AOM (modulation ea acousto-optic), EOM (modulation ea electro-optic), SOM/SOA(ho eketsa khanya ea semiconductor hape ho tsejoang e le semiconductor modulation), lephetoho ea laser e tobilengHar'a bona, AOM,EOM,SOM ke ya modulation ya kantle, kapa modulation e sa tobang.

1. Modulatara wa Acousto-optic (AOM)

Modulation ea acousto-optic ke ts'ebetso ea 'mele e sebelisang phello ea acousto-optic ho kenya tlhahisoleseling ho carrier ea optical. Ha e fetoloa, lets'oao la motlakase (modulation ea amplitude) le sebelisoa pele ho transducer ea electro-acoustic, e fetolang lets'oao la motlakase hore e be tšimo ea ultrasonic. Ha leqhubu la leseli le feta ka har'a acousto-optic medium, carrier ea optical ea fetoloa 'me e fetoha tlhahisoleseling ea maqhubu a fetotsoeng ka matla ka lebaka la ketso ea acousto-optic.

2. Modulator ea Electro-Optical(EOM)

Modulator ea electro-optical ke modulator e sebelisang litlamorao tsa electro-optical tsa likristale tse itseng tsa electro-optical, joalo ka likristale tsa lithium niobate (LiNb03), likristale tsa GaAs (GaAs) le likristale tsa lithium tantalate (LiTa03). Phello ea electro-optical ke hore ha motlakase o sebelisoa ho kristale ea electro-optical, index ea refractive ea kristale ea electro-optical e tla fetoha, e leng se fellang ka liphetoho litšobotsing tsa leqhubu la leseli la kristale, 'me phetoho ea phase, amplitude, matla le boemo ba polarization ba lets'oao la optical lia phethahala.

Setšoantšo: Sebopeho se tloaelehileng sa potoloho ea mokhanni oa EOM

3. Semiconductor Optical Modulator/Semiconductor optical amplifier (SOM/SOA)

Semiconductor optical amplifier (SOA) hangata e sebediswa bakeng sa ho hodisa letshwao la optical, e nang le melemo ya chip, tshebediso e tlase ya matla, tshehetso bakeng sa di-band tsohle, jj., mme ke mokhoa o mong wa nakong e tlang ho ena le di-amplifier tsa optical tsa setso tse kang EDFA (Seholisa-faeba se nang le Erbium). Sesebediswa sa semiconductor optical modulator (SOM) ke sesebediswa se tshwanang le sesebediswa sa semiconductor optical amplifier, empa tsela eo se sebediswang ka yona e fapane hanyane le tsela eo se sebediswang ka sesebediswa sa setso sa SOA, mme ditshupo tseo se shebaneng le tsona ha se sebediswa e le sesebediswa sa lesedi di fapane hanyane le tse sebediswang e le sesebediswa sa ho hodisa matshwao a lesedi, SOA e atisa ho fuwa motlakase o tsitsitseng ho netefatsa hore SOA e sebetsa sebakeng se otlolohileng; Ha e sebediswa ho fetola di-pulse tsa lesedi, e kenya matshwao a lesedi a tswelang pele ho SOA, e sebedisa di-pulse tsa motlakase ho laola motlakase wa ho kganna wa SOA, ebe e laola boemo ba tlhahiso ya SOA e le ho hodisa/ho fokotsa matla. Ha e sebedisa dibopeho tsa ho hodisa le ho fokotsa matla tsa SOA, mokgwa ona wa ho fetola matla o sebedisitswe butle-butle ho dikopo tse ding tse ntjha, tse kang ho utlwa fiber ya lesedi, LiDAR, ditshwantsho tsa bongaka tsa OCT le masimo a mang. Haholo-holo bakeng sa maemo a mang a hlokang karolelano e phahameng ya bophahamo, tshebediso ya matla le ho fela ha matla.

4. Ho feto-fetoha ha laser ka kotloloho ho ka boela ha fetola lets'oao la optical ka ho laola ka ho toba motlakase oa laser, joalo ka ha ho bontšitsoe setšoantšong se ka tlase, bophara ba pulse ea nanosecond tse 3 bo fumanoa ka ho feto-fetoha ha direct. Ho ka bonoa hore ho na le spike qalong ea pulse, e tlisoang ke ho phomola ha sesebelisoa sa laser. Haeba u batla ho fumana pulse ea li-picosecond tse ka bang 100, u ka sebelisa spike ena. Empa hangata ha re batle ho ba le spike ena.

Kakaretso

AOM e loketse tlhahiso ea matla a optical ka li-watts tse 'maloa' me e na le ts'ebetso ea phetoho ea maqhubu. EOM e potlakile, empa bothata ba drive bo holimo 'me karolelano ea ho fela e tlase. SOM (SOA) ke tharollo e ntle ka ho fetisisa bakeng sa lebelo la GHz le karolelano e phahameng ea ho fela, ka tšebeliso e tlase ea matla, miniaturization le likarolo tse ling. Li-diode tsa laser tse tobileng ke tharollo e theko e tlaase, empa ela hloko liphetoho litšobotsing tsa spectral. Morero o mong le o mong oa modulation o na le melemo le mathata a oona, 'me ho bohlokoa ho utloisisa litlhoko tsa ts'ebeliso ka nepo ha u khetha moralo, le ho tloaelana le melemo le mathata a morero ka mong, le ho khetha moralo o loketseng ka ho fetisisa. Mohlala, ho senseng ea fiber e ajoang, AOM ea setso ke eona e ka sehloohong, empa meralong e meng e mecha ea sistimi, ts'ebeliso ea merero ea SOA e ntse e hola ka potlako, mererong e meng ea setso ea moea liDAR sebelisa AOM ea mekhahlelo e 'meli, moralo o mocha oa morero e le ho fokotsa litšenyehelo, ho fokotsa boholo, le ho ntlafatsa karolelano ea ho fela, morero oa SOA oa amoheloa. Tsamaisong ea puisano, sistimi ea lebelo le tlase hangata e amohela morero oa modulation o tobileng, 'me sistimi ea lebelo le phahameng hangata e sebelisa morero oa modulation oa electro-optic.