ʻO ka lākiō hoʻopau loa kiʻekiʻe loa electro-optic modulator

ʻO ka mea hou loaultra-high extinction ratio electro-optic modulator

Loaʻa i nā modulators electro-optical on-chip (silicon-based, triquinoid, thin film lithium niobate, a me nā mea ʻē aʻe) nā mea maikaʻi o ka compactness, ka wikiwiki kiʻekiʻe a me ka hoʻohana haʻahaʻa haʻahaʻa, akā aia nō nā paʻakikī nui e hoʻokō i ka hoʻololi ʻana i ka ikaika me ka ultra-high extinction ratio. I kēia mau lā, ua hana nā mea noiʻi ma kahi hui noiʻi hui no Fiber Optic Sensing ma ke kulanui Kina i kahi holomua nui ma ke kahua o ka ultra-high extinction ratio electro-optical modulators ma nā substrates silicon. Ma muli o ke kiʻekiʻe kiʻekiʻe o ka kānana kānana, ʻo ka silika on-chipelectro-optic modulatorme ka lākiō hoʻopau a hiki i ka 68 dB ʻike ʻia no ka manawa mua. ʻO ka nui a me ka hoʻohana ʻana i ka mana he ʻelua mau kauoha o ka nui ma mua o ka mea kahikoAOM modulator, a ua hōʻoia ʻia ka hiki ke hoʻohana ʻia o ka mea hana ma ka ʻōnaehana DAS.

Kiʻi 1 kiʻi kiʻi o ka mea hoʻāʻo no ka ultrakiʻekiʻe extinction ratio electro-optic modulator

ʻO ke kumu silikaelectro-optical modulatorma muli o ka ho'opili 'ana i ke kānana microring e like me ke kānana uila ma'amau. Hoʻokō ka modulator electro-optic i ka kānana bandpass pālahalaha a me ka lakio hōʻole kiʻekiʻe o waho o ka band (>60 dB) ma o ka hui pū ʻana o nā resonator microring ʻehā. Me ke kōkua o kahi Pin-type electro-optical phase shifter i kēlā me kēia microring, hiki ke hoʻololi nui ʻia ka spectrum transmittance o ka modulator ma kahi uila haʻahaʻa haʻahaʻa (<1.5 V). ʻO ke kiʻekiʻe o waho o ka band rejection ratio i hui pū ʻia me ke kānana kiʻekiʻe kiʻekiʻe i ka hiʻohiʻona hiki ke hoʻololi i ka ikaika o ke kukui hoʻokomo kokoke i ka lōʻihi o ka hawewe resonant me kahi ʻokoʻa nui loa, kahi kūpono loa i ka hana ʻana i nā pulses māmā.

No ka hōʻoia i ka mana modulation o ka electro-optic modulator, ua hōʻike mua ka hui i ka hoʻololi ʻana o ka transmittance o ka hāmeʻa me ka uila DC i ka nalu hana. Hiki ke ʻike ʻia ma hope o 1 V, hāʻule nui ka transmittance ma luna o 60 dB. Ma muli o ka palena o nā kaʻina nānā oscilloscope maʻamau, ua hoʻohana ka hui noiʻi i ke ʻano hoʻohālikelike ponoʻī heterodyne, a hoʻohana i ka laulā nui o ka spectrometer e hōʻike i ka lākiō hoʻopau ikaika loa o ka modulator i ka wā pulse modulation. Hōʻike nā hopena hoʻokolohua ʻo ka pulse māmā puka o ka modulator he lākiō hoʻopau a hiki i 68 dB, a ʻo ka lākiō hoʻopau ʻoi aku ma mua o 65 dB kokoke i kekahi mau kūlana hawewe resonant. Ma hope o ka helu kikoʻī ʻana, ʻo ka uila uila RF maoli i hoʻouka ʻia i ka electrode ma kahi o 1 V, a ʻo ka hoʻohana ʻana i ka mana modulation he 3.6 mW wale nō, ʻo ia ʻelua mau kauoha o ka liʻiliʻi ma mua o ka hoʻohana mana modulator AOM maʻamau.

Hiki ke hoʻohana ʻia ka hoʻohana ʻana o Silicon based electro-optic modulator i ka ʻōnaehana DAS i kahi ʻōnaehana DAS ʻike pololei ma o ka hoʻopili ʻana i ka modulator on-chip. ʻOkoʻa mai ka interferometry heterodyne hōʻailona kūloko, ua hoʻohana ʻia ke ʻano demodulation o ka interferometry Michelson non-balanced i kēia ʻōnaehana, no laila ʻaʻole koi ʻia ka hopena o ka hoʻololi ʻana o ka modulator. Hoʻihoʻi maikaʻi ʻia nā hoʻololi ʻāpana i hana ʻia e nā hōʻailona vibration sinusoidal e ka demodulation o nā hōʻailona hoʻopuehu ʻo Rayleigh o nā kaha 3 me ka hoʻohana ʻana i ka algorithm demodulation IQ maʻamau. Hōʻike nā hopena i ka SNR ma kahi o 56 dB. E noiʻi hou ʻia ka māhele ʻana o ka mana spectral density ma ka lōʻihi holoʻokoʻa o ka fiber sensor ma ke ʻano o ka frequency signal ± 100 Hz. Ma waho aʻe o ka hōʻailona koʻikoʻi ma ke kūlana vibration a me ka alapine, ʻike ʻia aia kekahi mau mana spectral density pane ma nā wahi spatial ʻē aʻe. ʻO ka leo crosstalk ma ka laulā o ± 10 Hz a ma waho o ke kūlana haʻalulu e awelika ma ka lōʻihi o ka fiber, a ʻo ka awelika SNR ma kahi ākea ʻaʻole i emi iho ma mua o 33 dB.

Kiʻi 2

he kiʻikuhi Schematic o ka fiber optical i puʻunaue acoustic sensing system.

b.

c, d nā alapine haʻalulu kokoke i ka hāʻawi ʻana i ka mana spectral density ma ka fiber sensing.

ʻO kēia haʻawina ka mea mua e hoʻokō i kahi modulator electro-optical ma ke silika me kahi lākiō hoʻopau kiʻekiʻe kiʻekiʻe (68 dB), a ua hoʻopili maikaʻi ʻia i nā ʻōnaehana DAS, a kokoke loa ka hopena o ka hoʻohana ʻana i ka modulator AOM pāʻoihana, a ʻo ka nui a me ka hoʻohana ʻana i ka mana he ʻelua mau kauoha o ka liʻiliʻi ma mua o ka hope, i manaʻo ʻia e pāʻani i ke kuleana nui i ka hanauna hou o nā ʻōnaehana liʻiliʻi liʻiliʻi, haʻahaʻa. Eia kekahi, ke kaʻina hana hana nui CMOS a me ka hiki ke hoʻohui ʻia ma luna o ka pahu silikanā mea hana optoelectronichiki iā ia ke hoʻoikaika nui i ka hoʻomohala ʻana o kahi hanauna hou o nā kumu kūʻai haʻahaʻa, multi-device monolithic integrated modules based on-chip distributed fiber sensing system.