DFB laser holoʻokoʻa-fiber hoʻokahi

All-fiber single-frequencyDFB laser

Hoʻolālā ala ʻōpika

ʻO 1550.16nm ka nalu waena o kahi laser fiber DFB maʻamau, a ʻoi aku ka nui o ka hōʻole ʻana o ka ʻaoʻao ma mua o 40dB. Hāʻawi ʻia ka 20dB linewidth o aDFB fiber laserʻo 69.8kHz, hiki ke ʻike ʻia ʻo kāna laina laina 3dB ʻo 3.49kHz.

ʻO ka wehewehe ʻana i ke ala Optical

1. Hoʻokahi-frequency pūnaewele laser

Hoʻokumu ʻia ke ala optical me nā ʻāpana optical passive e like me ka 976 nm pumpedlaser, π -pahu hoʻoneʻe kiʻi, erbium-doped fiber, a me ka hawewe mahele multiplexer. ʻO ke kumu hana, ʻo ke kukui pahū i hana ʻia e ka laser pumped 976 nm i hoʻopuka ʻia ma o ka pale pale a hoʻokaʻawale ʻia i ʻelua ala. ʻO 20% o ke kukui paila e hele i ka hopena 980nm o ka 1550/980nm wavelength division multiplexer a komo i ka π -phase shift grating. Hoʻopili ʻia ka laser kumu kumu hua i ka hopena 1550 nm o ka 1550/980nm WDM ma hope o ka hele ʻana i kahi mea hoʻokaʻawale fiber. Hoʻohui ʻia ʻo 80% o ke kukui pahū ma o ka 1550/980 nm wavelength division multiplexer i loko o kahi 2 m erbium-doped gain fiber EDF no ka hoʻololi ʻana i ka ikehu, e hoʻokō ana i ka hoʻonui ʻana i ka mana laser.

ʻO ka hope, loaʻa ka hopena laser ma o kahi ISO. Hoʻopili ʻia ka laser puka i ka spectrometer (OSA) a me ka mīkini mana optical (PM) no ka nānā ʻana i ka spectrum output laser a me ka mana laser. Hoʻopili ʻia nā ʻāpana āpau o ke ala ʻōpika holoʻokoʻa e ka fiber optic fusion splicer, e loaʻa ana i kahi ʻōnaehana ʻōnaehana fiber optical piha me ka lōʻihi o ka lua ma kahi o 10 mika. ʻO ka loop loop o ka ʻōnaehana ana laula laina i haku ʻia me nā mea penei: ʻelua 3 dB optical fiber couplers, he 50 km SM-28e single-mode optical fiber lohi laina, he 40 MHz.acouste-optic modulator, a me amea nānā kiʻia me ka mea hoʻoponopono spectrum.

2. Nā ʻāpana hāmeʻa:

EDF: Aia ka lōʻihi hawewe hana i ka hui C, ʻo ka puka helu he 0.23, ʻo ka peak absorption ʻo 1532 nm, ʻo ka waiwai maʻamau he 33 dB/m, a ʻo ka poho wili he 0.2 dB.

Pump protector: Hiki iā ia ke hāʻawi i ka pale ʻana i ka pauma ma ka band 800 a 2000 nm, me ka nalu waena o 976 nm a me ka mana hoʻokele mana o 1 W.

Optical fiber coupler: Hoʻomaopopo ia i ka hāʻawi ʻana a i ʻole ka hui pū ʻana o ka mana hōʻailona optical. 1 * 2 optical fiber coupler, me ka māhele māhele o 20: 80%, kahi hawewe hana o 976nm, a me ke ʻano hoʻokahi.

Wavelong division multiplexer: Hoʻomaopopo ia i ka hui ʻana a me ka māhele ʻana o nā hōʻailona optical ʻelua o nā lōʻihi nalu like ʻole, 980/1550 nm WDM. ʻO ka fiber ma ka hopena o ka pauma ʻo Hi1060, a ʻo ka fiber ma ka hopena maʻamau a me ka hopena hōʻailona ʻo SMF-28e.

ʻO ka mea hoʻokaʻawale fiber Optical: Kāohi i ke kumu kukui mai ka hoʻopilikia ʻia ʻana e nā kukui i hoʻohālikelike ʻia i hope, me ka lōʻihi o ka hawewe hana o 1550nm, bipolar isolator, a me ka mana optical kiʻekiʻe o 1W.