He hoʻolālā o ka hoʻomāmā ʻana i ke alapine optical e pili ana i ka modulator MZM

He hoʻolālā o ka hoʻomāmā ʻana i ke alapine optical ma muli oMea hoʻololi MZM

Hiki ke hoʻohana ʻia ka hoʻolaha alapine optical ma ke ʻano he liDARkumu kukuie hoʻopuka a scan i nā ʻaoʻao like ʻole i ka manawa like, a hiki ke hoʻohana ʻia ma ke ʻano he kumu kukui multi-wavelength o 800G FR4, e hoʻopau ana i ka ʻano MUX. ʻO ka maʻamau, ʻo ke kumu kukui multi-wavelength he mana haʻahaʻa a ʻaʻole i hoʻopili maikaʻi ʻia, a he nui nā pilikia. He nui nā pono o ka hoʻolālā i hoʻolauna ʻia i kēia lā a hiki ke kuhikuhi ʻia no ka ʻike. Ua hōʻike ʻia kāna kiʻikuhi hoʻonohonoho penei: ʻO ka mana kiʻekiʻeKukuna DFBʻO ke kumu kukui he kukui CW i ka ʻāpana manawa a me ka nalu hoʻokahi i ka alapine (frequency). Ma hope o ka hala ʻana ma waena o kahimea hoʻololime kahi alapine modulation fRF, e hoʻopuka ʻia ka sideband, a ʻo ka manawa sideband ka alapine modulated fRF. Hoʻohana ka modulator i kahi modulator LNOI me ka lōʻihi o 8.2mm, e like me ka mea i hōʻike ʻia ma ke Kiʻi b. Ma hope o kahi ʻāpana lōʻihi o ka mana kiʻekiʻemea hoʻololi pae, ʻo ke alapine modulation he fRF nō hoʻi, a pono kona pae e hana i ka crest a i ʻole ka trough o ka hōʻailona RF a me ka pulse māmā e pili ana kekahi i kekahi, e hopena ana i kahi chirp nui, e hopena ana i nā niho optical hou aʻe. Hiki i ka DC bias a me ka hohonu modulation o ka modulator ke hoʻopilikia i ka flatness o ka optical frequency dispersion.

Ma ke ʻano makemakika, ʻo ka hōʻailona ma hope o ka hoʻololi ʻia ʻana o ke kahua kukui e ka modulator:
Hiki ke ʻike ʻia he alapine hoʻopuehu alapine (optical frequency dispersion) ke kahua optical output me kahi alapine (frequency interval) o wrf, a pili ka ikaika o ka niho hoʻopuehu alapine (optical frequency dispersion) i ka mana opitika DFB. Ma ka hoʻohālikelike ʻana i ka ikaika o ke kukui e hele ana ma o ka modulator MZM a meMea hoʻololi pae PM, a laila FFT, loaʻa ka optical frequency dispersion spectrum. Hōʻike ke kiʻi ma lalo nei i ka pilina pololei ma waena o ka optical frequency flatness a me ka modulator DC bias a me ka modulation depth e pili ana i kēia simulation.

Hōʻike ke kiʻi ma lalo nei i ke kiʻikuhi spectral simulated me ka MZM bias DC o 0.6π a me ka hohonu modulation o 0.4π, e hōʻike ana he <5dB kona pālahalaha.

Eia ka kiʻikuhi pūʻolo o ka modulator MZM, he 500nm ka mānoanoa o LN, ʻo ka hohonu o ke kahakaha ʻana he 260nm, a ʻo ka laulā o ke alakaʻi nalu he 1.5um. ʻO ka mānoanoa o ka electrode gula he 1.2um. ʻO ka mānoanoa o ka uhi luna SIO2 he 2um.

Eia ka spectrum o ka OFC i hoʻāʻo ʻia, me 13 mau niho optically sparse a me ka flatness <2.4dB. ʻO 5GHz ka alapine modulation, a ʻo ka hoʻouka mana RF ma MZM a me PM he 11.24 dBm a me 24.96dBm. Hiki ke hoʻonui ʻia ka helu o nā niho o ka optical frequency dispersion excitation ma ka hoʻonui hou ʻana i ka mana PM-RF, a hiki ke hoʻonui ʻia ka optical frequency dispersion interval ma ka hoʻonui ʻana i ka modulation frequency. kiʻi
Ua hoʻokumu ʻia ka mea i luna ma ka papahana LNOI, a ua hoʻokumu ʻia kēia ma ka papahana IIIV. Penei ke kiʻikuhi hoʻonohonoho: Hoʻohui ka chip i ka laser DBR, MZM modulator, PM phase modulator, SOA a me SSC. Hiki i kahi chip hoʻokahi ke hoʻokō i ka lahilahi alapine optical hana kiʻekiʻe.

ʻO ka SMSR o ka laser DBR he 35dB, ʻo ka laulā o ka laina he 38MHz, a ʻo ka laulā hoʻonohonoho he 9nm.

Hoʻohana ʻia ka modulator MZM e hana i ka sideband me ka lōʻihi o 1mm a me ka bandwidth o 7GHz@3dB wale nō. Ua kaupalena ʻia e ka impedance mismatch, ka pohō optical a hiki i ka 20dB@-8B bias.

ʻO 500µm ka lōʻihi o SOA, kahi i hoʻohana ʻia e uku no ka nalowale ʻokoʻa optical modulation, a ʻo ka bandwidth spectral he 62nm@3dB@90mA. Hoʻomaikaʻi ka SSC i hoʻohui ʻia ma ka hopena i ka pono o ka hoʻopili ʻana o ka chip (ʻo 5dB ka pono o ka hoʻopili ʻana). ʻO ka mana hopena hope loa ma kahi o −7dBm.

I mea e hana ai i ka hoʻolaha alapine optical, ʻo ke alapine modulation RF i hoʻohana ʻia he 2.6GHz, ʻo ka mana he 24.7dBm, a ʻo ka Vpi o ka modulator phase he 5V. ʻO ke kiʻi ma lalo nei ka hopena o ka photophobic spectrum me 17 mau niho photophobic @10dB a me SNSR ʻoi aku ka kiʻekiʻe ma mua o 30dB.

Ua manaʻo ʻia ka hoʻolālā no ka hoʻoili ʻana o ka microwave 5G, a ʻo ke kiʻi ma lalo nei ka ʻāpana spectrum i ʻike ʻia e ka mea ʻike kukui, hiki ke hoʻoulu i nā hōʻailona 26G ma ka 10 manawa o ke alapine (frequency). ʻAʻole i ʻōlelo ʻia ma ʻaneʻi.

I ka hōʻuluʻulu manaʻo, ʻo ke alapine optical i hana ʻia e kēia ʻano hana he alapine paʻa, walaʻau haʻahaʻa, mana kiʻekiʻe a me ka hoʻohui maʻalahi, akā aia kekahi mau pilikia. Pono ka hōʻailona RF i hoʻouka ʻia ma ka PM i ka mana nui, ka hoʻohana ʻana i ka mana nui, a ua kaupalena ʻia ka alapine e ka helu modulation, a hiki i ka 50GHz, e koi ana i kahi alapine lōʻihi (ma ke ʻano maʻamau >10nm) i ka ʻōnaehana FR8. Hoʻohana palena ʻia, ʻaʻole lawa ka palahalaha mana.