Tsa morao-raomodulator ea electro-optic ea karolelano ea ho fela e phahameng haholo
Li-modulator tsa electro-optical tse nang le on-chip (tse thehiloeng ho silicon, triquinoid, thin film lithium niobate, jj.) li na le melemo ea ho ba bokhutšoanyane, lebelo le phahameng le tšebeliso e tlase ea matla, empa ho ntse ho e-na le liphephetso tse kholo tsa ho fihlella phetoho ea matla a matla ka karolelano ea ho fela e phahameng haholo. Haufinyane tjena, bafuputsi Setsing sa lipatlisiso se kopaneng sa Fiber Optic Sensing univesithing ea Chaena ba entse tsoelo-pele e kholo lefapheng la li-modulator tsa electro-optical tse nang le karolelano ea ho fela e phahameng haholo holim'a li-substrate tsa silicon. Ho latela sebopeho sa filthara ea optical e phahameng, silicon e nang le on-chipmodulator ea electro-opticka karolelano ea ho timela ha matla e fihlang ho 68 dB e bonoa ka lekhetlo la pele. Boholo le tšebeliso ea matla li nyane ka makhetlo a mabeli ho feta tsa setso.Modulator ea AOM, 'me monyetla oa ts'ebeliso ea sesebelisoa o netefalitsoe tsamaisong ea DAS ea laboratori.
Setšoantšo sa 1. Setšoantšo sa sekema sa sesebelisoa sa teko bakeng sa ultramodulator ea electro-optic e nang le karolelano e phahameng ea ho fela
E thehiloeng ho siliconmodulator ea electro-opticalHo latela sebopeho sa sefe sa microring se kopantsoeng ho tšoana le sefe sa motlakase sa khale. Modulator ea electro-optic e fihlella ho sefa ha bandpass e bataletseng le karolelano e phahameng ea ho hana ea kantle ho sehlopha (>60 dB) ka ho kopanya letoto la li-resonator tse 'ne tsa microring tse thehiloeng ho silicon. Ka thuso ea shifter ea phase ea electro-optical ea mofuta oa Pin ho microring ka 'ngoe, spectrum ea phetisetso ea modulator e ka fetoloa haholo ka motlakase o tlase o sebelisitsoeng (<1.5 V). Karolelano e phahameng ea ho hana ea kantle ho sehlopha e kopantsoeng le tšobotsi ea ho roll-down ea filthara e tetebelang e nolofalletsa matla a leseli le kenang haufi le bolelele ba maqhubu a resonant ho fetoloa ka phapang e kholo haholo, e leng se thusang haholo tlhahiso ea li-pulse tsa khanya tsa karolelano ea ho fela ha ultra-high.
Ho netefatsa bokgoni ba modulation ba modulator ya electro-optic, sehlopha se ile sa qala ka ho bontsha phapang ya phetiso ya sesebediswa ka motlakase wa DC ho wavelength ya tshebetso. Ho ka bonwa hore kamora 1 V, phetiso e theoha haholo ho feta 60 dB. Ka lebaka la moedi wa mekgwa ya ho shebella ya oscilloscope e tlwaelehileng, sehlopha sa bafuputsi se amohela mokgwa wa ho lekanya tšitiso ya self-heterodyne, mme se sebedisa mefuta e meholo ya dynamic ya spectrometer ho hlalosa karolelano ya dynamic extinction ya ultra-high ya modulator nakong ya pulse modulation. Diphetho tsa teko di bontsha hore pulse ya lesedi le tswang ya modulator e na le karolelano ya extinction ya ho fihla ho 68 dB, mme karolelano ya extinction ya ho feta 65 dB haufi le maemo a mmalwa a wavelength ya resonant. Kamora ho bala ka botlalo, voltage ya RF drive ya nnete e kentsweng ho electrode ke hoo e ka bang 1 V, mme tshebediso ya matla a modulation ke 3.6 mW feela, e leng ditaelo tse pedi tse nyane ho feta tshebediso ya matla a modulator ya AOM e tlwaelehileng.
Tšebeliso ea modulator ea electro-optic e thehiloeng ho Silicon tsamaisong ea DAS e ka sebelisoa tsamaisong ea DAS ea ho lemoha ka ho toba ka ho paka modulator ea on-chip. Ho fapana le interferometry ea heterodyne e akaretsang ea local-signal, mokhoa oa demodulation oa interferometry ea Michelson e sa leka-lekanang o sebelisoa tsamaisong ena, e le hore phello ea phetoho ea maqhubu a optical ea modulator e se ke ea hlokahala. Liphetoho tsa mohato tse bakoang ke matšoao a ho thothomela a sinusoidal li tsosolosoa ka katleho ka ho qhaqholla matšoao a hasaneng a Rayleigh a liteishene tse 3 ho sebelisoa algorithm ea demodulation ea IQ e tloaelehileng. Liphetho li bontša hore SNR e ka ba 56 dB. Kabo ea bongata ba spectral ea matla ho pholletsa le bolelele bohle ba fiber ea sensor ho pholletsa le maqhubu a matšoao ±100 Hz e hlahlojoa haholoanyane. Ntle le lets'oao le hlahelletseng boemong ba ho thothomela le maqhubu, ho bonoa hore ho na le likarabo tse itseng tsa bongata ba spectral ea matla libakeng tse ling tsa sebaka. Lerata la crosstalk le pakeng tsa ±10 Hz le ka ntle ho boemo ba ho thothomela le lekanyelitsoe bolelele ba fiber, 'me SNR e tloaelehileng sebakeng ha e ka tlase ho 33 dB.
Setšoantšo sa 2
Setšoantšo sa Sekema sa sistimi ea ho lemoha molumo oa acoustic e ajoang ka fiber ea optical.
b Botebo ba spectral ba matla a lets'oao bo fokolitsoeng.
c, d maqhubu a ho thothomela haufi le kabo ea bongata ba spectral ea matla hammoho le faeba ea ho lemoha.
Phuputso ena ke ea pele ho fihlela modulator ea electro-optical holim'a silicon e nang le karolelano ea ho fela ha ultra-high (68 dB), 'me e sebelisitsoe ka katleho lits'ebetsong tsa DAS,' me phello ea ho sebelisa modulator ea khoebo ea AOM e haufi haholo, 'me boholo le tšebeliso ea matla li nyane haholo ho feta tsa morao-rao, e leng se lebelletsoeng ho bapala karolo ea bohlokoa molokong o latelang oa litsamaiso tsa ho lemoha fiber tse nyane, tse nang le matla a tlase. Ho phaella moo, ts'ebetso e kholo ea tlhahiso ea CMOS le bokhoni ba ho kopanya li-chip tsa silicon-basedlisebelisoa tsa optoelectronice ka kgothaletsa haholo ntshetsopele ya moloko o motjha wa di-module tse kopaneng tsa monolithic tse theko e tlase, tse nang le disebediswa tse ngata tse itshetlehileng hodima ditsamaiso tsa ho lemoha faeba tse ajwang ka di-chip.
Nako ea poso: Hlakubele-18-2025