Dulmar guud ee afar habeeyaha guud

Dulmar guud ee afar habeeyaha guud

Warqadani waxay soo bandhigaysaa afar hab oo wax-ka-beddelid ah (isbeddelka baaxadda laysarka ee goobta nanosecond ama subnanosecond time domain) kuwaas oo inta badan lagu isticmaalo hababka laser fiber. Kuwaas waxaa ka mid ah AOM (modulation acousto-optic), EOM (modulation electro-optic), SOM/SOA(Iftiinka nalka semiconductor sidoo kale loo yaqaan habaynta semiconductor), iyoHababka laser tooska ah. Waxaa ka mid ah, AOM,EOM,SOM waxay ka tirsan tahay habaynta dibadda, ama habaynta dadban.

1. Modulator Acousto-optic (AOM)

Habbaynta acousto-optic waa hannaan jireed oo adeegsada saamaynta acousto-optic si loogu shubo macluumaadka sidaha indhaha. Marka wax laga beddelo, calaamadda korantada (modulation amplitude) ayaa marka hore lagu dabaqaa beddelaha korantada, kaas oo u beddela signalka korantada goobta ultrasonic. Marka mowjadda iftiinku dhex maro dhexdhexaadiyaha acousto-optic, sidaha indhaha waa la habeeyey oo wuxuu noqdaa mowjad xoog leh oo habaysan oo sidda macluumaadka sababta oo ah ficilka acousto-optic

2. Modulator Electro-optical Modulator(EOM)

Modulator-ka elektro-optical modulator waa modulator-ka isticmaala saamaynta korantada-aragga ee kiristaalo-electro-optical crystals qaarkood, sida lithium niobate crystals (LiNb03), crystals GaAs (GaAs) iyo lithium tantalate crystals (LiTa03). Saamaynta elektro-optical waa in marka danab lagu codsado in crystal-optic, index refractive ee kristal electro-optical waa beddeli doonaa, taasoo keentay in isbedel ku sifooyinka mawjada iftiinka crystal, iyo modulation ee wajiga. baaxadda, xoojinta iyo xaaladda kala soocida calaamadda indhaha ayaa la xaqiiqsaday.

Jaantus: Qaabeynta caadiga ah ee wareegga darawalka EOM

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

Semiconductor optical amplifier (SOA) waxaa badanaa loo isticmaalaa kor u qaadida calaamadaha indhaha, kaas oo leh faa'iidooyinka chip, isticmaalka tamarta yar, taageerada dhammaan qaybaha, iwm.Eerbium-doped fibre amplifier). Semiconductor Optical Modulator (SOM) waa qalab la mid ah qalabka cod-weyneeye-ga ee semiconductor-ka, laakiin habka loo isticmaalo ayaa wax yar ka duwan habka loo isticmaalo cod-weyneeye SOA-ga caadiga ah, iyo tilmaamayaasha ay diiradda saaraan marka loo isticmaalo sidii Modulator-ka iftiinka wax yar ayuu ka duwan yahay kuwa loo isticmaalo cod-weyneeye ahaan. Marka loo isticmaalo kor u qaadida ishaarada indhaha, socodka waditaanka xasiloon ayaa badanaa la siiyaa SOA si loo hubiyo in SOA ay ka shaqeyso gobolka toosan; Marka loo isticmaalo in lagu beddelo garaaca indhaha, waxay gelisaa calaamadaha indhaha ee joogtada ah ee SOA, waxay isticmaashaa garaaca korantada si ay u maamusho SOA wadista hadda, ka dibna waxay xakameysaa heerka wax soo saarka SOA sidii kor u qaadis / attenuation. Iyada oo la adeegsanayo xoojinta SOA iyo sifooyinka attenuation, qaabkan wax-ka-beddelka ayaa si tartiib tartiib ah loogu dabaqay codsiyada cusub qaarkood, sida dareenka fiber indhaha, LiDAR, sawirka caafimaadka OCT iyo meelo kale. Gaar ahaan xaaladaha qaarkood oo u baahan mug aad u sarreeya, isticmaalka tamarta iyo saamiga dabar goynta.

4. Hababka tooska ah ee laser-ka ayaa sidoo kale wax ka beddeli kara calaamadda indhaha iyada oo si toos ah u xakameynaysa eexda laysarka ee hadda jirta, sida ku cad shaxanka hoose, 3 nanosecond ballac garaaca wadnaha ayaa la helay iyada oo loo marayo habaynta tooska ah. Waxaa la arki karaa in ay jirto barar bilawga garaaca wadnaha, taas oo ay keentay nasashada qalabka laser-ka. Haddii aad rabto in aad hesho garaac garaac ah ilaa 100 picoseconds, waxaad isticmaali kartaa garaacan. Laakiin sida caadiga ah ma rabno inaan yeelano kororkaan.

Isku soo wada duuboo

AOM waxay ku habboon tahay soo saarista tamarta indhaha ee dhowr watts waxayna leedahay shaqo wareeg ah oo soo noqnoqota. EOM waa dhakhso, laakiin kakanaanta darawalku aad ayuu u sarreeyaa saamiga dabar go'una wuu hooseeyaa. SOM (SOA) waa xalka ugu fiican ee xawaaraha GHz-da iyo saamiga baabi'inta sare, oo leh isticmaalka koronto yar, yareyn iyo astaamo kale. Diodes laser toos ah ayaa ah xalka ugu raqiisan, laakiin ka digtoonow isbeddelada sifooyinka muuqaalka. Nidaam kasta oo wax-ka-beddelka ahi wuxuu leeyahay faa'iidooyin iyo faa'iido darrooyin u gaar ah, waxaana muhiim ah in si sax ah loo fahmo shuruudaha codsiga marka la dooranayo nidaamka, oo la baro faa'iidooyinka iyo khasaarooyinka nidaam kasta, lana doorto nidaamka ugu habboon. Tusaale ahaan, dareenka fiber-ka ee la qaybiyey, AOM-dhaqameedka ayaa ah kan ugu weyn, laakiin qaar ka mid ah naqshadaha nidaamka cusub, isticmaalka nidaamyada SOA ayaa si degdeg ah u koraya, qaar ka mid ah nidaamyada dhaqameed ee liDAR dabaysha waxay isticmaalaan laba marxaladood AOM, naqshadeynta nidaamka cusub si loo sameeyo hoos u dhig qiimaha, dhimi xajmiga, oo wanaaji saamiga dabar goynta, nidaamka SOA waa la qaatay. Nidaamka isgaadhsiinta, nidaamka xawaaraha hooseeya wuxuu caadi ahaan qaataa nidaamka habaynta tooska ah, iyo nidaamka xawaaraha sare wuxuu caadi ahaan adeegsadaa nidaamka habaynta elektro-optic.