Ibintu bibiri by'ibanze bya laser, kimwe gikangurwa no gusohora imyuka, ikindi ni resonator. Muri iyi nyandiko, hamenyekanye ihame ryibanze rya DBR (Ikwirakwizwa rya Bragg Reflector), ni resonator mu bwoko bwa VCSEL. Ubumenyi bubiri bwibanze bwa fiziki: icyerekezo cyo guhinduranya no guhuza firime yoroheje bitangizwa.
Umwanya wa DBR muri laser ya VCSEL urerekanwa hepfo:
Inzira yo guhinduka
Iyo urumuri rwoherejwe kuva murwego ruto ruke n1 kugeza kuri n2 rwagati rwinshi (indangagaciro yo kwanga n2> n1), urumuri rwerekanwe ruzanyura kuri dogere 180 icyiciro. Ariko, nta cyiciro cyinzibacyuho kibaho mugihe uburyo bwa fotodense bwandujwe muburyo bwo gufotora.
Urebye mubyubuhanga, urumuri nabwo ni umuyagankuba wa elegitoroniki, kandi urumuri rwumucyo rushobora kugereranywa no kwerekana ibimenyetso byamashanyarazi mugihe impedance ihindutse. Iyo ikimenyetso cyamashanyarazi cyinjiye mumurongo muto woherejwe kuva kumurongo woherejwe cyane, gitanga icyerekezo kibi cyo kwerekana (icyiciro cya dogere 180), kandi iyo cyinjiye mumurongo wohereza inzitizi kuva kumurongo muto woherejwe. , itanga icyiciro cyiza cyo kwerekana (nta cyiciro cyinzibacyuho). Indangantego yo guhanagura uburyo bwo gukwirakwiza optique isa nimbogamizi yikwirakwizwa ryamashanyarazi.
Ibisobanuro byimbitse birenze iyi ngingo.
Kwivanga kwa firime
Iyo urumuri runyuze muri firime yoroheje, ruzagaragazwa kabiri hejuru hejuru no hepfo, kandi ubunini bwa firime yoroheje bizagira ingaruka kubitandukanya inzira nziza yibitekerezo byombi. Niba ubunini bwa firime yoroheje bugenzurwa kuba (1/4 + N) inshuro z'uburebure bwumurongo, itandukaniro ryinzira ya optique yibitekerezo byombi ni (1/2 + 2N), kandi itandukaniro ryinzira nziza ihuye na dogere 180. icyiciro cyinzibacyuho, kandi kimwe mubitekerezo bizanyura mucyiciro cya dogere 180. Noneho urumuri rwerekanwe inshuro ebyiri amaherezo ruri mucyiciro, kandi superposition irazamurwa, ni ukuvuga ko coeffisiyoneri yo kwerekana muri rusange yiyongera. Mubyukuri, DBR nigice gisimburana cyibitangazamakuru bibiri byanga. Iyo urumuri runyuze muri DBR, buri cyiciro kizongera sisitemu yo kugaragariza, kandi coefficente yo kwerekana ya DBR irashobora kugera kurwego rwo hejuru cyane.
Igishushanyo mbonera cya firime:
Icyitonderwa 1: Kugirango werekane neza, imirishyo itatu yumucyo ishushanywa ukwayo, ariko mubyukuri yashyizwe hamwe;
Igishushanyo 2: Icyerekezo cya mbere cyubururu (icyiciro cya dogere 180 inzibacyuho) naho icya kabiri kigaragaza urumuri rwumuhondo (itandukaniro rya dogere 180 bitewe nuburyo butandukanye bwo gutandukanya inzira) amaherezo arangije icyiciro, kandi superposition irazamurwa.
Imiterere ya DBR irashobora kongera ibitekerezo binyuze mubice byinshi byo gutekereza. Nyamara, DBR ikora ikoresheje ihame ryo kwivanga, bityo DBR izaba ifite uburyo bwo kwerekana ibintu byinshi kumurongo wihariye wumucyo wumucyo, kandi irashobora kugera kubihombo bike cyane, kandi nubundi bwoko bwerekana (nkibice byicyuma) biratandukanye mubiranga ibitekerezo
Ibyavuzwe haruguru niHDV Phoelectron Technology Ltd kuzana abakiriya kubyerekeye "ibitekerezo bibiri byibanze bya laser" ingingo yo gutangiza, kandi isosiyete yacu ni umusaruro wihariye wabakora imiyoboro ya optique, ibicuruzwa birimo ni ONU (OLT ONU / AC ONU / CATV ONU / GPON ONU / XPON ONU). scenarios yo gushyigikira imiyoboro, ikaze kugisha inama.