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 phepelo ea 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 Ho feto-fetoha ha molumo 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 ea ka 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 khanya 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