Laser DFB mai mita ɗaya-zaɓi-duka-zaɓi

Mita ɗaya-ɗaya-zaren fiberLaser DFB

Tsarin hanyar gani

Tsawon tsayin tsakiya na laser fiber na DFB na yau da kullun shine 1550.16nm, kuma rabon ƙin yarda da gefe-da-gefe ya fi 40dB. Ganin cewa layin layi na 20dB naLaser fiber DFBshine 69.8kHz, ana iya sanin cewa faɗin layinsa na 3dB shine 3.49kHz.

Bayanin hanyar gani

1. Tsarin laser mai mita ɗaya

Hanyar gani ta ƙunshi abubuwan gani masu aiki kamar 976 nm da aka famfolaser, π -phase shift grating, erbium-doped fiber, da kuma wavelength division multiplexer. Ka'idar aiki ita ce hasken famfo da laser mai famfo 976 nm ya samar ana fitar da shi ta hanyar kariyar famfo kuma a raba shi zuwa hanyoyi biyu. Kashi 20% na hasken famfo yana ratsa ƙarshen 980nm na wavelength division multiplexer na 1550/980nm kuma yana shiga grating na π -phase shift. Laser ɗin tushen iri yana da alaƙa da ƙarshen 1550 nm na 1550/980nm WDM bayan ya ratsa ta hanyar raba fiber. Kashi 80% na hasken famfo yana da alaƙa ta hanyar multiplexer na wavelength division na 1550/980 nm zuwa cikin EDF na fiber mai ƙarfin erbium 2 m don musayar makamashi, wanda ke cimma haɓakar ƙarfin laser.

A ƙarshe, ana samun fitowar laser ta hanyar ISO. Ana haɗa laser ɗin fitarwa zuwa na'urar auna sigina (OSA) da kuma na'urar auna wutar lantarki (PM) bi da bi don sa ido kan fitowar laser da ƙarfin laser. Duk sassan hanyar gani ta tsarin gaba ɗaya an haɗa su ta hanyar haɗa fiber optic fusion splicer, wanda ya samar da cikakken tsarin tsarin fiber optic tare da tsawon rami na kimanin mita 10. Madaurin tsarin auna faɗin layi ya ƙunshi na'urori masu zuwa: maɗauran fiber optic guda biyu masu 3 dB, layin jinkiri na fiber optic na SM-28e mai tsawon kilomita 50, 40 MHzmai daidaita sauti na acouste-optic, da kumana'urar gano hotoda kuma na'urar nazarin bakan.

2. Sigogin na'ura:

EDF: Tsawon tsayin aiki yana cikin rukunin C, buɗewar lambobi shine 0.23, kololuwar sha shine 1532 nm, ƙimar da aka saba da ita shine 33 dB/m, kuma asarar walda shine 0.2 dB.

Mai kare famfo: Yana iya samar da kariyar famfo a cikin band 800 zuwa 2000 nm, tare da tsayin tsayin tsakiya na 976 nm da ƙarfin sarrafa wutar lantarki na 1 W.

Maɗaurin fiber na gani: Yana gano rarrabawa ko haɗakar ƙarfin siginar gani. Maɗaurin fiber na gani 1*2, tare da rabon rabawa na 20:80%, tsawon tsayin aiki na 976nm, da kuma yanayin guda ɗaya.

Mai amfani da yawa na rarraba tsawon wavelength: Yana gano haɗuwa da rarraba sigina biyu na gani na tsawon tsayi daban-daban, 980/1550 nm WDM. Zaren da ke ƙarshen famfo shine Hi1060, kuma zaren da ke ƙarshen gama gari da ƙarshen sigina shine SMF-28e.

Mai raba fiber na gani: Yana hana tushen haske ya yi mummunan tasiri daga hasken da ke nuna baya, tare da tsawon rai mai aiki na 1550nm, mai raba bipolar, da kuma matsakaicin ƙarfin gani na 1W.