Ihe kacha ọhụrụ ultra-high extinction ratio electro-optic modulator

Kacha ọhụrụultra-high extinction ratio electro-optic modulator

On-chip electro-optical modulators (silicon dabeere, triquinoid, thin film lithium niobate, wdg) nwere uru nke compactness, elu ọsọ na obere ike oriri, ma a ka nwere nnukwu ihe ịma aka iji nweta ike ike modulation na ultra-high extinction ratio. N'oge na-adịbeghị anya, ndị na-eme nchọpụta na ụlọ ọrụ nyocha nkwonkwo maka Fiber Optic Sensing na mahadum China emeela nnukwu ọganihu n'ọhịa nke ultra-high extinction ratio electro-optical modulators na silicon substrates. Dabere na usoro nzacha ngwa anya dị elu, silicon on-chipelectrooptic modulatorna oke mkpochapu ruru 68 dB na-emezu maka oge mbụ. Nha na ike oriri bụ iwu abụọ dị ntakịrị karịa nke ọdịnalaAOM modulator, na akwadoro ike ngwa nke ngwaọrụ ahụ na sistemụ DAS ụlọ nyocha.

Ọgụgụ 1 Eserese eserese nke ngwaọrụ nnwale maka ultraoke ikpochapu oke electro-optic modulator

Ihe dabere na siliconelectro-optical modulatordabere n'usoro nzacha microring jikọtara ya na nzacha eletriki oge gboo. Onye na-ahụ maka eletrọnịkị na-enweta nzacha bandpass dị larịị yana oke njụta ​​nke na-apụ apụ (> 60 dB) site na njikọ nke ihe nrụpụta microring sitere na silicon anọ. Site n'enyemaka nke pin-ụdị electro-optical phase shifter na nke ọ bụla microring, transmittance ụdịdị dị iche iche nke modulator nwere ike nke ukwuu gbanwere na a obere etinye voltaji (<1.5 V). The elu si band jụrụ ratio jikọtara na nkpoda nyo mpịakọta-ala àgwà na-enyere ike nke input ìhè nso resonant wavelength na-modulated na a nnọọ nnukwu iche, nke bụ nnọọ mma na mmepụta nke ultra-elu ikpochapụ ruru ìhè usu.

Iji nyochaa ike mgbanwe nke modulator electro-optic, ndị otu ahụ gosipụtara mgbanwe nke nnyefe nke ngwaọrụ na voltaji DC na ogologo ogologo ọrụ. Enwere ike ịhụ na mgbe 1 V gasịrị, nnyefe na-adaba nke ọma karịa 60 dB. N'ihi mmachi nke usoro nlele oscilloscope nkịtị, ndị otu nyocha na-agbaso usoro nha nnyonye anya heterodyne, ma na-eji nnukwu ike nke spectrometer iji mara oke mbibi ike dị oke elu nke modulator n'oge mgbanwe pulse. Nsonaazụ nnwale ahụ na-egosi na mpụta ọkụ ọkụ nke modulator nwere oke mbibi ruru 68 dB, yana oke mkpochapu nke ihe karịrị 65 dB n'akụkụ ọtụtụ ọnọdụ resonant resonant. Mgbe ngụkọ zuru ezu, ezigbo voltaji mbanye RF nke etinyere na electrode bụ ihe dịka 1 V, na ike oriri na-edozi ahụ bụ naanị 3.6mW, nke bụ iwu abụọ dị ntakịrị karịa ike oriri AOM modulator.

Ngwa nke Silicon based electro-optic modulator na sistemu DAS nwere ike itinye ya na sistemụ DAS nchọpụta ozugbo site na ịkwakọba modulator on-chip. N'iche na mkpokọta local-signal heterodyne interferometry, a na-anakwere ọnọdụ demodulation nke Michelson interferometry na-abụghị nke ziri ezi na sistemu a, nke mere na ọ dịghị mkpa mmetụta ntụgharị anya nke modulator. A na-eweghachite mgbanwe nke usoro nke nrịbama na-ama jijiji sinusoidal nke ọma site n'ịkwalite akara ngosi Rayleigh gbasasịa nke ọwa 3 site na iji IQ demodulation algọridim. Nsonaazụ gosiri na SNR dị ihe dịka 56 dB. A na-enyocha nkesa nke ike spectral density n'ogologo dum nke eriri sensọ na nsonye nke ugboro mgbaàmà ± 100 Hz. E wezụga mgbama ama ama na ọnọdụ ịma jijiji na ugboro ole, a na-ahụ na enwere ụfọdụ nzaghachi njupụta ike na ebe ndị ọzọ. Mkpọtụ ụda olu na nso nke ± 10 Hz na n'èzí ọnọdụ ịma jijiji bụ nkezi n'ogologo ogologo eriri, na nkezi SNR na oghere adịghị ala karịa 33 dB.

Onyonyo 2

Eserese eserese nke eriri anya na-ekesa usoro ihe mmetụta ụda.

b Ike njupụta njupụta nke mgbama agbagoro agbaji.

c, d ugboro vibration nso ike spectral density nkesa n'akụkụ eriri mmetụta.

Ọmụmụ ihe a bụ nke mbụ iji nweta modulator electro-optical modulator na silicon nwere oke mkpochapụ dị elu (68 dB), wee tinye ya na sistemụ DAS nke ọma, yana mmetụta nke iji modulator AOM azụmahịa dị ezigbo nso, na nha na ike oriri bụ iwu abụọ nke ịdị ukwuu dị obere karịa nke ikpeazụ, nke a na-atụ anya na ọ ga-arụ ọrụ dị mkpa na ọgbọ na-esote nke obere sistemụ ikesa. Na mgbakwunye, usoro nrụpụta nnukwu CMOS na ike ntinye aka na mgbawa nke dabere na siliconngwaọrụ optoelectronicnwere ike kwalite nke ukwuu mmepe nke ọgbọ ọhụrụ nke ọnụ ala dị ọnụ ala, multi-ngwaọrụ monolithic integrated modul dabere na-chip ekesa fiber sensing usoro.