Unxibelelwano oluhambelanayo lwe-optical: isigaba sokukhanya

Ihambelanayounxibelelwano lwe-optical: isigaba sokukhanya
Unxibelelwano oluhambelanayo aluxhomekekanga kuphela ekubeni ukukhanya kukhanye kangakanani, kodwa nakwindawo apho ukukhanya kukho khona, kwaye lusebenzisa nee-orthogonal polarizations ezimbini. Ngale ndlela, ulwazi oluthe kratya lunokufakwa kwi-wavelength efanayo, kwaye umgama wokudluliselwa unokuba kude.
1, Umthombo wokukhanya ohambelanayo: i-laser eqhubekayo, kodwa ifuna uzinzo olungakumbi
Umthombo wokukhanya kunxibelelwano oluhambelanayo useyi-CW continuous laser. Ayisiyo i-pulsed laser okanye i-LED, kodwa yimveliso eqhubekayo yokukhanya okuzinzileyo njenge-carrier wave ye-modulation elandelayo. Xa kuthelekiswa ne-CWumthombo wokukhanyakwiimodyuli eziqhelekileyo ze-optical ezimfutshane, kufuna iimfuno eziphezulu. Isitshixo asikokuba amandla anele na, kodwa kukwakho nokuba i-frequency kufuneka izinze kwaye ingxolo yesigaba kufuneka ibe phantsi. Ngoko ke, imithombo yokukhanya ehambelanayo inokuqondwa njenge-'optical reference' ezinzileyo ngakumbi. Iseyi-laser eqhubekayo, kodwa ifuna uzinzo oluphezulu.
2, Ukuguqulwa okuHlangeneyo: Akufani ne-modulator ye-EML
Ulwakhiwo lwe-EML luI-laser ye-DFB+EAM electroabsorbent modulator. I-EAM inoxanduva lokutshintsha i-absorption intensity ukuze i-output light improvement ikhanye okanye ibe mnyama. Ke ngoko, i-modulator kwi-EML ikakhulu yenza i-intensity modulation. I-Coherent modulation yahlukile. Ihlala isebenzisaUmlungisi we-IQ. I-IQ modulator ayikwenzi nje ukukhanya kukhanye okanye kube mnyama, kodwa yahlulahlula ukukhanya okuqhubekayo kwiindlela ze-I kunye ne-Q, ilawula izinto ezimbini zesigaba esijikelezayo ezihlukanisiweyo ngama-90 degrees, ize emva koko idibanise imveliso. Ngale ndlela, ukukhanya okuphumayo kunokuthwala ulwazi lwe-amplitude kunye nesigaba ngaxeshanye.
3, Ukususwa kwe-Coherent: ukusebenzisa isibane se-oscillator sendawo ukufunda isigaba
I-PD eqhelekileyo ibona kuphela ukukhanya okukhulu kwaye ayinakubona ngqo isigaba. Ukuze ufunde isigaba ngendlela ehambelanayo, kufuneka kungeniswe umqadi wesalathiso obizwa ngokuba yi-LO, i-laser ye-oscillator yendawo,. Isiphelo sokwamkela sithumela ukukhanya kwesignali esidluliselweyo kunye nokukhanya kwe-oscillator yendawo kwi-optical mixer. Imisebe emibini yokukhanya iyaphazamisana, kwaye isiphumo sokuphazamiseka sinxulumene nomahluko wesigaba phakathi kwazo. Emva koko, i-balanced detector iguqula esi siphumo sokuphazamiseka sibe sisignali yombane. Ngokukhanya kwe-oscillator yendawo, isiphelo sokwamkela sinokumisela ukuba ingakanani i-engile esi sibane sesalathiso esicinyiweyo xa kuthelekiswa nokukhanya kwesalathiso.
4, Indawo kwi-AIDC: Umgama omfutshane usajonge i-IM-DD, i-DCI ijonge ngakumbi ukuhambelana
Eyona ndawo icacileyo yonxibelelwano oluhambelanayo kwiindawo zedatha ze-AI yi-DCI, emele i-Data Center Interconnection. Oko kukuthi, unxibelelwano olukhawulezayo phakathi kweziko zedatha, iipaki, kunye neendawo zasezidolophini.
Nangona kunjalo, i-IM-DD iseneengenelo zexabiso namandla kwiindlela zokunxibelelana ezimfutshane ngaphakathi naphakathi kweekhabhathi. Iimodyuli ze-optical ze-800G kunye ne-1.6T ezimfutshane ziza kusebenzisa kakhulu indlela efanayo ne-EML, i-silicon optics, i-PAM4, i-PD, kunye ne-TIA. Inkqubo edibeneyo inamacandelo amaninzi, ukusetyenziswa kwamandla okuphezulu, kunye ne-DSP enzima, kwaye ayizukuthatha indawo yeemodyuli ze-optical ezimfutshane ngaphandle kwemiqathango.