Ea pele, Ho feto-fetoha ha ka hare le ho feto-fetoha ha ka ntle
Ho ea ka kamano e lekanyelitsoeng pakeng tsa modulator le laser, thelaser modulatione ka aroloa ka ho feto-fetoha ha lentsoe ka hare le ho feto-fetoha ha lentsoe ka ntle.
01 ho feto-fetoha ha maemo ka hare
Letšoao la modulation le etsoa ts'ebetsong ea laser oscillation, ke hore, litekanyo tsa laser oscillation li fetoloa ho latela molao oa lets'oao la modulation, e le ho fetola litšobotsi tsa tlhahiso ea laser le ho fihlela modulation.
(1) Laola ka ho toba mohloli oa pompo ea laser ho finyella ho feto-fetoha ha matla a laser ea tlhahiso le hore na ho na le, e le hore e laoloe ke matla a matla.
(2) Karolo ea modulation e behiloe ka har'a resonator, 'me phetoho ea litšoaneleho tsa sebopeho sa modulation e laoloa ke lets'oao ho fetola liparamente tsa resonator, ka hona ho fetola litšobotsi tsa laser.
02 Mofetoleli oa ka ntle
Modulation ea kantle ke karohano ea tlhahiso ea laser le modulation.E bua ka ho kenngoa ha lets'oao le fetotsoeng ka mor'a ho thehoa ha laser, ke hore, modulator e behoa tseleng ea optical ka ntle ho laser resonator.
Matla a leqhubu la modulation a eketsoa ho modulator ho etsa hore litšoaneleho tse ling tsa sebopeho sa modulator li fetohe, 'me ha laser e feta ho eona, likarolo tse ling tsa leqhubu la leseli lia fetoloa, ka hona li jara tlhahisoleseling e lokelang ho fetisoa.Ka hona, ho feto-fetoha ha molumo oa kantle ha se ho fetola li-parameter tsa laser, empa ho fetola mekhahlelo ea laser e hlahisoang, joalo ka matla, maqhubu, joalo-joalo.
Ea bobeli,laser modulatorkarohano
Ho latela mokhoa oa ho sebetsa oa modulator, e ka aroloa hoelectro-optic modulation, acoustooptic modulation, magneto-optic modulation le modulation e tobileng.
01 Ho feto-fetoha ha molumo ka kotloloho
Boemo ba ho khanna balaser ea semiconductorkapa diode e ntšang leseli e fetotsoe ka kotloloho ke lets'oao la motlakase, e le hore leseli le tsoang le fetoloe ka phetoho ea lets'oao la motlakase.
(1) TTL modulation ka ho toba modulation
Letšoao la dijithale la TTL le eketsoa phepelong ea matla a laser, e le hore motlakase oa laser o ka laoloa ka lets'oao la kantle, ebe maqhubu a laser a ka laoloang.
(2) Analog modulation ka ho toba modulation
Ho phaella ho laser matla a phepelo analoge pontso (amplitude ka tlase ho 5V arbitrary phetoho leqhubu la leqhubu), ka etsa hore letshwao la ka ntle input gagamalo fapaneng e tsamaisanang le laser fapaneng kganna hona joale, 'me joale laola dipholo tsa laser matla.
02 Ho feto-fetoha ha molumo oa elektro-optic
Ho feto-fetoha ha molumo ka mokhoa oa electro-optic ho bitsoa electro-optic modulation.Motheo oa 'mele oa electro-optic modulation ke phello ea electro-optic, ke hore, tlas'a ts'ebetso ea sebaka sa motlakase se sebelisitsoeng, index ea refractive ea likristale tse ling e tla fetoha,' me ha leqhubu la leseli le feta sebakeng sena, litšobotsi tsa lona tsa phetisetso li tla fetoha. ameha le ho fetoha.
03 Acousto-optic modulation
Motheo oa 'mele oa ho feto-fetoha ha molumo oa acousto-optic ke phello ea acousto-optic, e bolelang ketsahalo ea hore maqhubu a khanyang a hasane kapa a hasane ke tšimo ea maqhubu a phahametseng tlhaho ha a ntse a hasana bohareng.Ha index ea refractive ea seaplane e fetoha nako le nako ho theha index ea refractive index, diffraction e tla etsahala ha leqhubu la leseli le ata bohareng, 'me matla, maqhubu le tataiso ea khanya e fapaneng e tla fetoha ka phetoho ea tšimo ea maqhubu a supergenerated.
Acousto-optic modulation ke ts'ebetso ea 'mele e sebelisang phello ea acousto-optic ho kenya tlhahisoleseling ho mochini o tsamaisang maqhubu.Letšoao le fetotsoeng le sebelisoa ho transducer ea electro-acoustic ka mokhoa oa pontšo ea motlakase (amplitude modulation), 'me pontšo ea motlakase e lumellanang e fetoloa tšimong ea ultrasonic.Ha leqhubu la khanya le feta har'a acousto-optic medium, mochine oa optical o fetoloa 'me o fetoha leqhubu le feto-fetohang le "jarang" tlhahisoleseding.
04 Magneto-optical modulation
Magneto-optic modulation ke ts'ebeliso ea Faraday's electromagnetic optical rotation effect.Ha maqhubu a khanya a ata ka har'a magneto-optical medium parallel ho ea moo matla a khoheli a leng teng, ketsahalo ea ho potoloha ha sefofane sa polarization ea leseli le polarized e bitsoa rotation ea makenete.
Matla a khoheli a sa khaotseng a sebelisoa ho ea bohareng ho fihlela matla a khoheli.Tataiso ea matla a khoheli a potoloho e ka lehlakoreng la axial ea mahareng, 'me ho potoloha ha Faraday ho ipapisitse le matla a khoheli a axial.Ka hona, ka ho laola hona joale ha coil e phahameng-frequency le ho fetola matla a matla a khoheli a pontšo ea axial, Angle ea ho potoloha ea sefofane sa optical vibration e ka laoloa, e le hore amplitude e khanyang ka polarizer e fetohe ka phetoho ea θ Angle. , e le ho fihlela modulation.
Nako ea poso: Jan-08-2024