Ilaser ye-DFB ye-fiber eyodwa-frequency eyodwa

I-All-fiber single-frequencyI-DFB laser

Umklamo wendlela ye-Optical

Ubude begagasi obumaphakathi belaser yefayibha ye-DFB evamile ngu-1550.16nm, futhi isilinganiso sokunqatshwa kohlangothi nesohlangothi sikhulu kuno-40dB. Uma kubhekwa ukuthi ububanzi bomugqa obungu-20dB be-aI-DFB fiber laseringu-69.8kHz, kungaziwa ukuthi ububanzi bayo be-3dB bungu-3.49kHz.

Incazelo yendlela yokubona

1. Isistimu ye-laser ye-single-frequency

Umzila we-optical wakhiwe izingxenye ze-passive optical ezifana ne-976 nm pumped.laser, π -phase shift grating, i-erbium-doped fiber, kanye ne-wavelength division multiplexer. Umgomo wokusebenza ukuthi ukukhanya kwepompo okukhiqizwe yi-laser pumped engu-976 nm kuphuma ngesivikeli sepompo futhi kuhlukaniswe izindlela ezimbili. U-20% wokukhanya kwephampu udlula ekugcineni kuka-980nm we-1550/980nm wavelength division multiplexer bese ungena ku-π -phase shift grating. I-laser yomthombo wembewu ephumayo ixhunywe ekugcineni kwe-1550 nm ye-1550/980nm WDM ngemva kokudlula ku-fiber isolator. U-80% wesibani sephampu uhlanganiswe nge-multiplexer ye-wavelength division engu-1550/980 nm ibe yi-fiber EDF engu-2 m ye-erbium-doped yokushintshanisa amandla, kuzuzwe ukukhuliswa kwamandla e-laser.

Ekugcineni, ukuphuma kwe-laser kufinyelelwa nge-ISO. I-laser ephumayo ixhunywe ku-spectrometer (OSA) kanye nemitha yamandla optical (PM) yokuqapha i-laser output spectrum namandla e-laser. Zonke izingxenye zendlela yokubona yohlelo lonke zixhunywe i-fiber optic fusion splicer, efinyelela ukwakheka kwesistimu yefiber ebonakalayo enobude obungamamitha ayi-10. Iluphu yesistimu yokulinganisa ububanzi bomugqa yenziwe ngalezi mishini ezilandelayo: ama-couplers amabili we-3 dB optical fibre, umugqa wokulibaziseka we-50 km SM-28e wemodi eyodwa ye-fiber optical, 40 MHzi-acouste-optic modulator, kanye no-ai-photodetectorkanye ne-spectrum analyzer.

2. Amapharamitha wedivayisi:

I-EDF: Ubude begagasi obusebenzayo busebhendini engu-C, indawo yokuvula inombolo ingu-0.23, inani eliphakeme lokumunca lingu-1532 nm, inani elijwayelekile lingu-33 dB/m, kanti ukulahlekelwa kokushisela kungu-0.2 dB.

Isivikeli sephampu: Inganikeza ukuvikelwa kwepompo ebhendini engu-800 kuya ku-2000 nm, enobude obumaphakathi obungu-976 nm namandla okubamba amandla angu-1 W.

I-Optical fiber coupler: Ibona ukusatshalaliswa noma inhlanganisela yamandla esignali yokubona. I-1*2 optical fiber coupler, enesilinganiso sokuhlukanisa esingu-20:80%, ubude begagasi obusebenzayo obungu-976nm, kanye nemodi eyodwa.

I-Wavelength division multiplexer: Iqaphela inhlanganisela nokuhlukaniswa kwamasignali amabili optical amaza ahlukene, i-980/1550 nm WDM. I-fiber ekugcineni kwepompo yi-Hi1060, futhi i-fiber ekugcineni evamile kanye nesiphetho sesignali yi-SMF-28e.

I-Optical fibre isolator: Ivimbela umthombo wokukhanya ukuthi ungathinteki kabi ukukhanya okubheke emuva, okunobude begagasi obusebenzayo obungu-1550nm, i-bipolar isolator, namandla amakhulu okubona angu-1W.