Uburyo bushya bwo gupima amashanyarazi bwa ultra-high extinction ratio electro-optic modulator

Ibiherukamodulator ya electro-optic ifite uburebure bwa ultra-high extinction ratio

Udukoresho twa electro-optical modulators two kuri on-chip (dushingiye kuri silicone, triquinoide, lithium niobate y'icyuma gito, nibindi) dufite ibyiza byo kuba duto, umuvuduko mwinshi no gukoresha ingufu nke, ariko haracyari imbogamizi zikomeye zo kugera ku ihinduka ry'imbaraga rikoresheje ultra-high termination ratio. Vuba aha, abashakashatsi bo mu kigo cy’ubushakashatsi cya Fiber Optic Sensing muri kaminuza yo mu Bushinwa bakoze iterambere rikomeye mu bijyanye na ultra-high termination ratio electro-optical modulators kuri substrates za silicon. Hashingiwe ku miterere ya filter ya optical yo hejuru, silicon yo kuri on-chipmodulator y'amashanyarazi n'amataraku nshuro ya mbere, igipimo cyo kuzimira kigera kuri 68 dB cyaragaragaye. Ingano n'ikoreshwa ry'ingufu ni bito cyane ugereranyije n'ibya gakondo.Modulator ya AOM, kandi ubushobozi bwo gukoresha igikoresho bwemezwa muri sisitemu ya DAS yo muri laboratwari.

Ishusho ya 1 Ishusho y'igishushanyo mbonera cy'igikoresho cyo gupima cya Ultramodulator ya electro-optic ifite ikigereranyo cyo kuzimira cyane

Ishingiye kuri siliconmodulator y'amashanyarazi n'amataraHashingiwe ku miterere ya microring ihujwe, isa n'iya filter ya kera y'amashanyarazi. Electro-optic modulator igera ku kuyungurura bandpass igororotse no ku gipimo cyo kwanga hanze y'umugozi (>60 dB) binyuze mu guhuza urukurikirane rw'ama resonators ane ya microring ashingiye kuri silicon. Hakoreshejwe pin-type electro-optical phase shifter muri buri microring, spectrum yo kohereza ya modulator ishobora guhinduka cyane kuri voltage iri hasi (<1.5 V). Igipimo cyo kwanga hanze y'umugozi kinini hamwe n'imiterere ya steep filter roll-down bituma ubukana bw'urumuri rwinjiye hafi y'uburebure bwa resonant buhinduka cyane, ibyo bikaba ari byiza cyane mu gukora ultra-high extinction ratio light pulses.

Kugira ngo harebwe ubushobozi bwo guhindura imiterere y'igikoresho, itsinda ryabanje kwerekana itandukaniro ry'uburyo gitanga urumuri hamwe na voltage ya DC ku bunini bw'uburebure bw'umurambararo. Bigaragara ko nyuma ya 1 V, uburyo bwo gutanga urumuri bugabanuka cyane hejuru ya 60 dB. Bitewe n'uburyo busanzwe bwo kureba oscilloscope, itsinda ry'ubushakashatsi ryakoresheje uburyo bwo gupima ubwikora bwa heterodyne interference, kandi rikoresha urwego runini rwa dynamic rwa spectrometer kugira ngo rigaragaze ikigereranyo cyo kuzimira kw'imbaraga cya modulator mu gihe cyo guhindura imiterere y'imbaraga. Ibisubizo by'igerageza bigaragaza ko impumuro y'urumuri rw'umukoresha ifite ikigereranyo cyo kuzimira cya 68 dB, naho ikigereranyo cyo kuzimira cya 65 dB hafi y'ahantu henshi ho kuzenguruka. Nyuma yo kubara birambuye, voltage nyayo ya RF drive ishyizwe kuri electrode ni 1 V, kandi ingufu za modulation ni 3.6 mW gusa, ni ukuvuga urwego rubiri rw'ubunini ruto ugereranyije n'imbaraga za modulator zisanzwe za AOM.

Gukoresha modulator ya electro-optic ishingiye kuri Silicon muri sisitemu ya DAS bishobora gukoreshwa kuri sisitemu ya DAS yo gutahura mu buryo butaziguye binyuze mu gupakira modulator iri kuri chip. Bitandukanye na interferometry rusange ya heterodyne, uburyo bwo gukuramo intera ya Michelson interferometry idahuje n'ikigereranyo bukoreshwa muri iyi sisitemu, ku buryo ingaruka zo guhindura frequency ya optique ya modulator zidakenewe. Impinduka mu cyiciro ziterwa n'ibimenyetso bya sinusoidal vibration zisubizwa neza binyuze mu gukuramo intera ya Rayleigh yatatanye y'imiyoboro 3 hakoreshejwe algorithme isanzwe ya IQ demodulation. Ibisubizo bigaragaza ko SNR ari hafi 56 dB. Ikwirakwizwa ry'ubucucike bwa spectral y'imbaraga ku burebure bwose bwa fibre ya sensor mu burebure bwa frequency y'ibimenyetso ±100 Hz rirasuzumwa cyane. Uretse ikimenyetso kigaragara ku mwanya wa vibration n'intera, byagaragaye ko hari ibisubizo bimwe na bimwe bya spectral y'imbaraga ku bindi bice by'ikirere. Urusaku rw'intertalk ruri hagati ya ±10 Hz no hanze y'umwanya wa vibration rushyirwa ku burebure bwa fibre, kandi SNR mpuzandengo mu isanzure ntabwo iri munsi ya 33 dB.

Igishushanyo cya 2

Imbonerahamwe y'icyitegererezo cy'uburyo bwo kumenya amajwi akwirakwizwa n'imirasire y'urumuri.

b Ubucucike bwa spectral y'ingufu z'ibimenyetso bwagabanijwe.

c, d imivuduko yo guhindagurika hafi y'ubucucike bwa spectral y'imbaraga ku ruhande rw'umugozi wo kumva.

Ubu bushakashatsi ni bwo bwa mbere bwagize modulator ya electro-optical kuri silikoni ifite ikigereranyo cyo kuzimira cyane (68 dB), kandi bwakoreshejwe neza kuri sisitemu za DAS, kandi ingaruka zo gukoresha modulator ya AOM y’ubucuruzi ziri hafi cyane, kandi ingano n’ikoreshwa ry’ingufu ni bike cyane ugereranyije n’iya nyuma, byitezwe ko bizagira uruhare runini mu gisekuru gitaha cya sisitemu ntoya zo kumenya fibre zikwirakwizwa mu buryo buciriritse. Byongeye kandi, inzira nini ya CMOS yo gukora no gushyira hamwe imashini zikoresha silikoni.ibikoresho by'ikoranabuhangabishobora guteza imbere cyane iterambere ry'ubwoko bushya bw'ibikoresho byinshi bihendutse kandi bifite modules nyinshi zishingiye kuri sisitemu zo kumenya fibre zikwirakwizwa kuri chip.