I-laser ye-DFB ene-fiber eyodwa enemvamisa eyodwa

Imvamisa eyodwa ye-fiber yonkeI-laser ye-DFB

Umklamo wendlela yokubona

Ubude be-wavelength obuphakathi be-laser ye-DFB fiber evamile bungu-1550.16nm, kanti isilinganiso sokwenqatshwa ohlangothini nohlangothi sikhulu kune-40dB. Njengoba ububanzi be-20dB be-aI-laser yefayibha ye-DFBingu-69.8kHz, kungaziwa ukuthi ububanzi bayo bomugqa ongu-3dB bungu-3.49kHz.

Incazelo yendlela ebonakalayo

1. Uhlelo lwe-laser olunemvamisa eyodwa

Indlela ye-optical yakhiwe yizingxenye ze-optical ezingasebenzi njenge-976 nm ephampuwei-laser, i-grit ye-π-phase shift, i-fiber efakwe i-erbium, kanye ne-multiplexer ye-wavelength division. Umgomo osebenzayo ukuthi ukukhanya kwephampu okukhiqizwa yi-laser efakwe i-976 nm kuphuma nge-pump protector futhi kuhlukaniswe ngezindlela ezimbili. U-20% wokukhanya kwephampu udlula ekugcineni kwe-980nm kwe-1550/980nm wavelength division multiplexer bese ungena kwi-π-phase shift grating. I-laser yomthombo wembewu ephumayo ixhunywe ekugcineni kwe-1550 nm kwe-1550/980nm WDM ngemva kokudlula ku-fiber isolator. U-80% wokukhanya kwephampu uhlanganiswa nge-multiplexer ye-1550/980 nm wavelength division ku-2 m erbium-doped gain fiber EDF yokushintshana kwamandla, okufeza ukwandiswa kwamandla e-laser.

Ekugcineni, umkhiqizo we-laser utholakala nge-ISO. I-laser ephumayo ixhunywe ngokulandelana kwi-spectrometer (OSA) kanye ne-optical power meter (PM) ukuze kuqashwe i-laser output spectrum kanye namandla e-laser. Zonke izingxenye zendlela ye-optical yesistimu yonke zixhunywe yi-fiber optic fusion splicer, okufeza isakhiwo sohlelo lwe-fiber optical oluphelele olunobude be-cavity obungaba amamitha ayi-10. I-loop yesistimu yokulinganisa ububanzi bomugqa yakhiwe ngamadivayisi alandelayo: ama-couplers amabili e-3 dB optical fiber, umugqa wokulibaziseka we-fiber optical single-mode SM-28e ongu-50 km, i-40 MHz.i-modulator ye-acouste-optic, kanye ne-umshini wokuthola izithombekanye ne-spectrum analyzer.

2. Amapharamitha edivayisi:

I-EDF: Ubude besikhathi sokusebenza busebhendini le-C, imbobo yezinombolo ingu-0.23, isiqongo sokumuncwa siyi-1532 nm, inani elijwayelekile lingu-33 dB/m, kanti ukulahlekelwa kokushisela kungu-0.2 dB.

Isivikelo sephampu: Singahlinzeka ngokuvikelwa kwephampu ebhendini engu-800 kuya ku-2000 nm, enobude obuphakathi obungu-976 nm kanye nomthamo wokuphatha amandla ongu-1 W.

Isixhumi sefayibha yokubona: Siqaphela ukusatshalaliswa noma inhlanganisela yamandla esignali yokubona. Isixhumi sefayibha yokubona esingu-1*2, esinesilinganiso sokuhlukana esingu-20:80%, ubude bomkhathi obusebenzayo obungu-976nm, kanye nemodi eyodwa.

I-multiplexer yokuhlukaniswa kwamagagasi: Iqaphela ukuhlanganiswa nokuhlukaniswa kwezibonakaliso ezimbili ezibonakalayo zamagagasi ahlukene, i-980/1550 nm WDM. I-fiber ekugcineni kwephampu yi-Hi1060, kanti i-fiber ekugcineni okuvamile nasekupheleni kwesignali yi-SMF-28e.

I-optical fiber isolator: Ivimbela umthombo wokukhanya ukuthi ungathinteki kabi ukukhanya okubukisiwe emuva, okunobude obusebenzayo obungu-1550nm, i-bipolar isolator, kanye namandla aphezulu okukhanya angu-1W.